Merge commit 'df84f17' into HEAD

This merge fixes a semantic conflict with the trivial tree.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

12 files changed, 1571 insertions, 873 deletions

diff --git a/hw/i386/Kconfig b/hw/i386/Kconfig
index c5c9d4900e..b25bb6d78a 100644
--- a/hw/i386/Kconfig
+++ b/hw/i386/Kconfig
@@ -92,6 +92,16 @@ config Q35
     select SMBIOS
     select FW_CFG_DMA
 
+config MICROVM
+    bool
+    imply SERIAL_ISA
+    select ISA_BUS
+    select APIC
+    select IOAPIC
+    select I8259
+    select MC146818RTC
+    select VIRTIO_MMIO
+
 config VTD
     bool
 
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index d3374e0831..0d195b5210 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -1,8 +1,10 @@
 obj-$(CONFIG_KVM) += kvm/
 obj-y += e820_memory_layout.o multiboot.o
+obj-y += x86.o
 obj-y += pc.o
 obj-$(CONFIG_I440FX) += pc_piix.o
 obj-$(CONFIG_Q35) += pc_q35.o
+obj-$(CONFIG_MICROVM) += microvm.o
 obj-y += fw_cfg.o pc_sysfw.o
 obj-y += x86-iommu.o
 obj-$(CONFIG_VTD) += intel_iommu.o
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index d9435ba0b3..9dd3dbb16c 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -361,6 +361,7 @@ static void
 build_madt(GArray *table_data, BIOSLinker *linker, PCMachineState *pcms)
 {
     MachineClass *mc = MACHINE_GET_CLASS(pcms);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
     const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(pcms));
     int madt_start = table_data->len;
     AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(pcms->acpi_dev);
@@ -390,7 +391,7 @@ build_madt(GArray *table_data, BIOSLinker *linker, PCMachineState *pcms)
     io_apic->address = cpu_to_le32(IO_APIC_DEFAULT_ADDRESS);
     io_apic->interrupt = cpu_to_le32(0);
 
-    if (pcms->apic_xrupt_override) {
+    if (x86ms->apic_xrupt_override) {
         intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
         intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
         intsrcovr->length = sizeof(*intsrcovr);
@@ -1831,6 +1832,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
     CrsRangeSet crs_range_set;
     PCMachineState *pcms = PC_MACHINE(machine);
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(machine);
+    X86MachineState *x86ms = X86_MACHINE(machine);
     AcpiMcfgInfo mcfg;
     uint32_t nr_mem = machine->ram_slots;
     int root_bus_limit = 0xFF;
@@ -2103,7 +2105,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
          * with half of the 16-bit control register. Hence, the total size
          * of the i/o region used is FW_CFG_CTL_SIZE; when using DMA, the
          * DMA control register is located at FW_CFG_DMA_IO_BASE + 4 */
-        uint8_t io_size = object_property_get_bool(OBJECT(pcms->fw_cfg),
+        uint8_t io_size = object_property_get_bool(OBJECT(x86ms->fw_cfg),
                                                    "dma_enabled", NULL) ?
                           ROUND_UP(FW_CFG_CTL_SIZE, 4) + sizeof(dma_addr_t) :
                           FW_CFG_CTL_SIZE;
@@ -2336,6 +2338,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
     int srat_start, numa_start, slots;
     uint64_t mem_len, mem_base, next_base;
     MachineClass *mc = MACHINE_GET_CLASS(machine);
+    X86MachineState *x86ms = X86_MACHINE(machine);
     const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(machine);
     PCMachineState *pcms = PC_MACHINE(machine);
     ram_addr_t hotplugabble_address_space_size =
@@ -2406,16 +2409,16 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
         }
 
         /* Cut out the ACPI_PCI hole */
-        if (mem_base <= pcms->below_4g_mem_size &&
-            next_base > pcms->below_4g_mem_size) {
-            mem_len -= next_base - pcms->below_4g_mem_size;
+        if (mem_base <= x86ms->below_4g_mem_size &&
+            next_base > x86ms->below_4g_mem_size) {
+            mem_len -= next_base - x86ms->below_4g_mem_size;
             if (mem_len > 0) {
                 numamem = acpi_data_push(table_data, sizeof *numamem);
                 build_srat_memory(numamem, mem_base, mem_len, i - 1,
                                   MEM_AFFINITY_ENABLED);
             }
             mem_base = 1ULL << 32;
-            mem_len = next_base - pcms->below_4g_mem_size;
+            mem_len = next_base - x86ms->below_4g_mem_size;
             next_base = mem_base + mem_len;
         }
 
@@ -2634,6 +2637,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
 {
     PCMachineState *pcms = PC_MACHINE(machine);
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
+    X86MachineState *x86ms = X86_MACHINE(machine);
     GArray *table_offsets;
     unsigned facs, dsdt, rsdt, fadt;
     AcpiPmInfo pm;
@@ -2795,7 +2799,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
          */
         int legacy_aml_len =
             pcmc->legacy_acpi_table_size +
-            ACPI_BUILD_LEGACY_CPU_AML_SIZE * pcms->apic_id_limit;
+            ACPI_BUILD_LEGACY_CPU_AML_SIZE * x86ms->apic_id_limit;
         int legacy_table_size =
             ROUND_UP(tables_blob->len - aml_len + legacy_aml_len,
                      ACPI_BUILD_ALIGN_SIZE);
@@ -2885,13 +2889,14 @@ void acpi_setup(void)
 {
     PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
     AcpiBuildTables tables;
     AcpiBuildState *build_state;
     Object *vmgenid_dev;
     TPMIf *tpm;
     static FwCfgTPMConfig tpm_config;
 
-    if (!pcms->fw_cfg) {
+    if (!x86ms->fw_cfg) {
         ACPI_BUILD_DPRINTF("No fw cfg. Bailing out.\n");
         return;
     }
@@ -2922,7 +2927,7 @@ void acpi_setup(void)
         acpi_add_rom_blob(acpi_build_update, build_state,
                           tables.linker->cmd_blob, "etc/table-loader", 0);
 
-    fw_cfg_add_file(pcms->fw_cfg, ACPI_BUILD_TPMLOG_FILE,
+    fw_cfg_add_file(x86ms->fw_cfg, ACPI_BUILD_TPMLOG_FILE,
                     tables.tcpalog->data, acpi_data_len(tables.tcpalog));
 
     tpm = tpm_find();
@@ -2932,13 +2937,13 @@ void acpi_setup(void)
             .tpm_version = tpm_get_version(tpm),
             .tpmppi_version = TPM_PPI_VERSION_1_30
         };
-        fw_cfg_add_file(pcms->fw_cfg, "etc/tpm/config",
+        fw_cfg_add_file(x86ms->fw_cfg, "etc/tpm/config",
                         &tpm_config, sizeof tpm_config);
     }
 
     vmgenid_dev = find_vmgenid_dev();
     if (vmgenid_dev) {
-        vmgenid_add_fw_cfg(VMGENID(vmgenid_dev), pcms->fw_cfg,
+        vmgenid_add_fw_cfg(VMGENID(vmgenid_dev), x86ms->fw_cfg,
                            tables.vmgenid);
     }
 
@@ -2951,7 +2956,7 @@ void acpi_setup(void)
         uint32_t rsdp_size = acpi_data_len(tables.rsdp);
 
         build_state->rsdp = g_memdup(tables.rsdp->data, rsdp_size);
-        fw_cfg_add_file_callback(pcms->fw_cfg, ACPI_BUILD_RSDP_FILE,
+        fw_cfg_add_file_callback(x86ms->fw_cfg, ACPI_BUILD_RSDP_FILE,
                                  acpi_build_update, NULL, build_state,
                                  build_state->rsdp, rsdp_size, true);
         build_state->rsdp_mr = NULL;
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index d3726361dd..d55dbf07fc 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -1540,6 +1540,7 @@ static void amdvi_realize(DeviceState *dev, Error **err)
     X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
     MachineState *ms = MACHINE(qdev_get_machine());
     PCMachineState *pcms = PC_MACHINE(ms);
+    X86MachineState *x86ms = X86_MACHINE(ms);
     PCIBus *bus = pcms->bus;
 
     s->iotlb = g_hash_table_new_full(amdvi_uint64_hash,
@@ -1568,7 +1569,7 @@ static void amdvi_realize(DeviceState *dev, Error **err)
     }
 
     /* Pseudo address space under root PCI bus. */
-    pcms->ioapic_as = amdvi_host_dma_iommu(bus, s, AMDVI_IOAPIC_SB_DEVID);
+    x86ms->ioapic_as = amdvi_host_dma_iommu(bus, s, AMDVI_IOAPIC_SB_DEVID);
 
     /* set up MMIO */
     memory_region_init_io(&s->mmio, OBJECT(s), &mmio_mem_ops, s, "amdvi-mmio",
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 771bed25c9..14e4e6ad62 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -3733,6 +3733,7 @@ static void vtd_realize(DeviceState *dev, Error **errp)
 {
     MachineState *ms = MACHINE(qdev_get_machine());
     PCMachineState *pcms = PC_MACHINE(ms);
+    X86MachineState *x86ms = X86_MACHINE(ms);
     PCIBus *bus = pcms->bus;
     IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev);
     X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
@@ -3773,7 +3774,7 @@ static void vtd_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, Q35_HOST_BRIDGE_IOMMU_ADDR);
     pci_setup_iommu(bus, vtd_host_dma_iommu, dev);
     /* Pseudo address space under root PCI bus. */
-    pcms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC);
+    x86ms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC);
     qemu_add_machine_init_done_notifier(&vtd_machine_done_notify);
 }
 
diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
new file mode 100644
index 0000000000..8aacd6c8d1
--- /dev/null
+++ b/hw/i386/microvm.c
@@ -0,0 +1,572 @@
+/*
+ * Copyright (c) 2018 Intel Corporation
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qemu/cutils.h"
+#include "qemu/units.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+#include "qapi/qapi-visit-common.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/cpus.h"
+#include "sysemu/numa.h"
+#include "sysemu/reset.h"
+
+#include "hw/loader.h"
+#include "hw/irq.h"
+#include "hw/kvm/clock.h"
+#include "hw/i386/microvm.h"
+#include "hw/i386/x86.h"
+#include "hw/i386/pc.h"
+#include "target/i386/cpu.h"
+#include "hw/timer/i8254.h"
+#include "hw/rtc/mc146818rtc.h"
+#include "hw/char/serial.h"
+#include "hw/i386/topology.h"
+#include "hw/i386/e820_memory_layout.h"
+#include "hw/i386/fw_cfg.h"
+#include "hw/virtio/virtio-mmio.h"
+
+#include "cpu.h"
+#include "elf.h"
+#include "kvm_i386.h"
+#include "hw/xen/start_info.h"
+
+#define MICROVM_BIOS_FILENAME "bios-microvm.bin"
+
+static void microvm_set_rtc(MicrovmMachineState *mms, ISADevice *s)
+{
+    X86MachineState *x86ms = X86_MACHINE(mms);
+    int val;
+
+    val = MIN(x86ms->below_4g_mem_size / KiB, 640);
+    rtc_set_memory(s, 0x15, val);
+    rtc_set_memory(s, 0x16, val >> 8);
+    /* extended memory (next 64MiB) */
+    if (x86ms->below_4g_mem_size > 1 * MiB) {
+        val = (x86ms->below_4g_mem_size - 1 * MiB) / KiB;
+    } else {
+        val = 0;
+    }
+    if (val > 65535) {
+        val = 65535;
+    }
+    rtc_set_memory(s, 0x17, val);
+    rtc_set_memory(s, 0x18, val >> 8);
+    rtc_set_memory(s, 0x30, val);
+    rtc_set_memory(s, 0x31, val >> 8);
+    /* memory between 16MiB and 4GiB */
+    if (x86ms->below_4g_mem_size > 16 * MiB) {
+        val = (x86ms->below_4g_mem_size - 16 * MiB) / (64 * KiB);
+    } else {
+        val = 0;
+    }
+    if (val > 65535) {
+        val = 65535;
+    }
+    rtc_set_memory(s, 0x34, val);
+    rtc_set_memory(s, 0x35, val >> 8);
+    /* memory above 4GiB */
+    val = x86ms->above_4g_mem_size / 65536;
+    rtc_set_memory(s, 0x5b, val);
+    rtc_set_memory(s, 0x5c, val >> 8);
+    rtc_set_memory(s, 0x5d, val >> 16);
+}
+
+static void microvm_gsi_handler(void *opaque, int n, int level)
+{
+    GSIState *s = opaque;
+
+    qemu_set_irq(s->ioapic_irq[n], level);
+}
+
+static void microvm_devices_init(MicrovmMachineState *mms)
+{
+    X86MachineState *x86ms = X86_MACHINE(mms);
+    ISABus *isa_bus;
+    ISADevice *rtc_state;
+    GSIState *gsi_state;
+    int i;
+
+    /* Core components */
+
+    gsi_state = g_malloc0(sizeof(*gsi_state));
+    if (mms->pic == ON_OFF_AUTO_ON || mms->pic == ON_OFF_AUTO_AUTO) {
+        x86ms->gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS);
+    } else {
+        x86ms->gsi = qemu_allocate_irqs(microvm_gsi_handler,
+                                        gsi_state, GSI_NUM_PINS);
+    }
+
+    isa_bus = isa_bus_new(NULL, get_system_memory(), get_system_io(),
+                          &error_abort);
+    isa_bus_irqs(isa_bus, x86ms->gsi);
+
+    ioapic_init_gsi(gsi_state, "machine");
+
+    kvmclock_create();
+
+    for (i = 0; i < VIRTIO_NUM_TRANSPORTS; i++) {
+        sysbus_create_simple("virtio-mmio",
+                             VIRTIO_MMIO_BASE + i * 512,
+                             x86ms->gsi[VIRTIO_IRQ_BASE + i]);
+    }
+
+    /* Optional and legacy devices */
+
+    if (mms->pic == ON_OFF_AUTO_ON || mms->pic == ON_OFF_AUTO_AUTO) {
+        qemu_irq *i8259;
+
+        i8259 = i8259_init(isa_bus, pc_allocate_cpu_irq());
+        for (i = 0; i < ISA_NUM_IRQS; i++) {
+            gsi_state->i8259_irq[i] = i8259[i];
+        }
+        g_free(i8259);
+    }
+
+    if (mms->pit == ON_OFF_AUTO_ON || mms->pit == ON_OFF_AUTO_AUTO) {
+        if (kvm_pit_in_kernel()) {
+            kvm_pit_init(isa_bus, 0x40);
+        } else {
+            i8254_pit_init(isa_bus, 0x40, 0, NULL);
+        }
+    }
+
+    if (mms->rtc == ON_OFF_AUTO_ON ||
+        (mms->rtc == ON_OFF_AUTO_AUTO && !kvm_enabled())) {
+        rtc_state = mc146818_rtc_init(isa_bus, 2000, NULL);
+        microvm_set_rtc(mms, rtc_state);
+    }
+
+    if (mms->isa_serial) {
+        serial_hds_isa_init(isa_bus, 0, 1);
+    }
+
+    if (bios_name == NULL) {
+        bios_name = MICROVM_BIOS_FILENAME;
+    }
+    x86_bios_rom_init(get_system_memory(), true);
+}
+
+static void microvm_memory_init(MicrovmMachineState *mms)
+{
+    MachineState *machine = MACHINE(mms);
+    X86MachineState *x86ms = X86_MACHINE(mms);
+    MemoryRegion *ram, *ram_below_4g, *ram_above_4g;
+    MemoryRegion *system_memory = get_system_memory();
+    FWCfgState *fw_cfg;
+    ram_addr_t lowmem;
+    int i;
+
+    /*
+     * Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory
+     * and 256 Mbytes for PCI Express Enhanced Configuration Access Mapping
+     * also known as MMCFG).
+     * If it doesn't, we need to split it in chunks below and above 4G.
+     * In any case, try to make sure that guest addresses aligned at
+     * 1G boundaries get mapped to host addresses aligned at 1G boundaries.
+     */
+    if (machine->ram_size >= 0xb0000000) {
+        lowmem = 0x80000000;
+    } else {
+        lowmem = 0xb0000000;
+    }
+
+    /*
+     * Handle the machine opt max-ram-below-4g.  It is basically doing
+     * min(qemu limit, user limit).
+     */
+    if (!x86ms->max_ram_below_4g) {
+        x86ms->max_ram_below_4g = 4 * GiB;
+    }
+    if (lowmem > x86ms->max_ram_below_4g) {
+        lowmem = x86ms->max_ram_below_4g;
+        if (machine->ram_size - lowmem > lowmem &&
+            lowmem & (1 * GiB - 1)) {
+            warn_report("There is possibly poor performance as the ram size "
+                        " (0x%" PRIx64 ") is more then twice the size of"
+                        " max-ram-below-4g (%"PRIu64") and"
+                        " max-ram-below-4g is not a multiple of 1G.",
+                        (uint64_t)machine->ram_size, x86ms->max_ram_below_4g);
+        }
+    }
+
+    if (machine->ram_size > lowmem) {
+        x86ms->above_4g_mem_size = machine->ram_size - lowmem;
+        x86ms->below_4g_mem_size = lowmem;
+    } else {
+        x86ms->above_4g_mem_size = 0;
+        x86ms->below_4g_mem_size = machine->ram_size;
+    }
+
+    ram = g_malloc(sizeof(*ram));
+    memory_region_allocate_system_memory(ram, NULL, "microvm.ram",
+                                         machine->ram_size);
+
+    ram_below_4g = g_malloc(sizeof(*ram_below_4g));
+    memory_region_init_alias(ram_below_4g, NULL, "ram-below-4g", ram,
+                             0, x86ms->below_4g_mem_size);
+    memory_region_add_subregion(system_memory, 0, ram_below_4g);
+
+    e820_add_entry(0, x86ms->below_4g_mem_size, E820_RAM);
+
+    if (x86ms->above_4g_mem_size > 0) {
+        ram_above_4g = g_malloc(sizeof(*ram_above_4g));
+        memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", ram,
+                                 x86ms->below_4g_mem_size,
+                                 x86ms->above_4g_mem_size);
+        memory_region_add_subregion(system_memory, 0x100000000ULL,
+                                    ram_above_4g);
+        e820_add_entry(0x100000000ULL, x86ms->above_4g_mem_size, E820_RAM);
+    }
+
+    fw_cfg = fw_cfg_init_io_dma(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4,
+                                &address_space_memory);
+
+    fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, machine->smp.cpus);
+    fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, machine->smp.max_cpus);
+    fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)machine->ram_size);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, kvm_allows_irq0_override());
+    fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE,
+                     &e820_reserve, sizeof(e820_reserve));
+    fw_cfg_add_file(fw_cfg, "etc/e820", e820_table,
+                    sizeof(struct e820_entry) * e820_get_num_entries());
+
+    rom_set_fw(fw_cfg);
+
+    if (machine->kernel_filename != NULL) {
+        x86_load_linux(x86ms, fw_cfg, 0, true, true);
+    }
+
+    if (mms->option_roms) {
+        for (i = 0; i < nb_option_roms; i++) {
+            rom_add_option(option_rom[i].name, option_rom[i].bootindex);
+        }
+    }
+
+    x86ms->fw_cfg = fw_cfg;
+    x86ms->ioapic_as = &address_space_memory;
+}
+
+static gchar *microvm_get_mmio_cmdline(gchar *name)
+{
+    gchar *cmdline;
+    gchar *separator;
+    long int index;
+    int ret;
+
+    separator = g_strrstr(name, ".");
+    if (!separator) {
+        return NULL;
+    }
+
+    if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
+        return NULL;
+    }
+
+    cmdline = g_malloc0(VIRTIO_CMDLINE_MAXLEN);
+    ret = g_snprintf(cmdline, VIRTIO_CMDLINE_MAXLEN,
+                     " virtio_mmio.device=512@0x%lx:%ld",
+                     VIRTIO_MMIO_BASE + index * 512,
+                     VIRTIO_IRQ_BASE + index);
+    if (ret < 0 || ret >= VIRTIO_CMDLINE_MAXLEN) {
+        g_free(cmdline);
+        return NULL;
+    }
+
+    return cmdline;
+}
+
+static void microvm_fix_kernel_cmdline(MachineState *machine)
+{
+    X86MachineState *x86ms = X86_MACHINE(machine);
+    BusState *bus;
+    BusChild *kid;
+    char *cmdline;
+
+    /*
+     * Find MMIO transports with attached devices, and add them to the kernel
+     * command line.
+     *
+     * Yes, this is a hack, but one that heavily improves the UX without
+     * introducing any significant issues.
+     */
+    cmdline = g_strdup(machine->kernel_cmdline);
+    bus = sysbus_get_default();
+    QTAILQ_FOREACH(kid, &bus->children, sibling) {
+        DeviceState *dev = kid->child;
+        ObjectClass *class = object_get_class(OBJECT(dev));
+
+        if (class == object_class_by_name(TYPE_VIRTIO_MMIO)) {
+            VirtIOMMIOProxy *mmio = VIRTIO_MMIO(OBJECT(dev));
+            VirtioBusState *mmio_virtio_bus = &mmio->bus;
+            BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
+
+            if (!QTAILQ_EMPTY(&mmio_bus->children)) {
+                gchar *mmio_cmdline = microvm_get_mmio_cmdline(mmio_bus->name);
+                if (mmio_cmdline) {
+                    char *newcmd = g_strjoin(NULL, cmdline, mmio_cmdline, NULL);
+                    g_free(mmio_cmdline);
+                    g_free(cmdline);
+                    cmdline = newcmd;
+                }
+            }
+        }
+    }
+
+    fw_cfg_modify_i32(x86ms->fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(cmdline) + 1);
+    fw_cfg_modify_string(x86ms->fw_cfg, FW_CFG_CMDLINE_DATA, cmdline);
+}
+
+static void microvm_machine_state_init(MachineState *machine)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(machine);
+    X86MachineState *x86ms = X86_MACHINE(machine);
+    Error *local_err = NULL;
+
+    microvm_memory_init(mms);
+
+    x86_cpus_init(x86ms, CPU_VERSION_LATEST);
+    if (local_err) {
+        error_report_err(local_err);
+        exit(1);
+    }
+
+    microvm_devices_init(mms);
+}
+
+static void microvm_machine_reset(MachineState *machine)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(machine);
+    CPUState *cs;
+    X86CPU *cpu;
+
+    if (machine->kernel_filename != NULL &&
+        mms->auto_kernel_cmdline && !mms->kernel_cmdline_fixed) {
+        microvm_fix_kernel_cmdline(machine);
+        mms->kernel_cmdline_fixed = true;
+    }
+
+    qemu_devices_reset();
+
+    CPU_FOREACH(cs) {
+        cpu = X86_CPU(cs);
+
+        if (cpu->apic_state) {
+            device_reset(cpu->apic_state);
+        }
+    }
+}
+
+static void microvm_machine_get_pic(Object *obj, Visitor *v, const char *name,
+                                    void *opaque, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+    OnOffAuto pic = mms->pic;
+
+    visit_type_OnOffAuto(v, name, &pic, errp);
+}
+
+static void microvm_machine_set_pic(Object *obj, Visitor *v, const char *name,
+                                    void *opaque, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    visit_type_OnOffAuto(v, name, &mms->pic, errp);
+}
+
+static void microvm_machine_get_pit(Object *obj, Visitor *v, const char *name,
+                                    void *opaque, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+    OnOffAuto pit = mms->pit;
+
+    visit_type_OnOffAuto(v, name, &pit, errp);
+}
+
+static void microvm_machine_set_pit(Object *obj, Visitor *v, const char *name,
+                                    void *opaque, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    visit_type_OnOffAuto(v, name, &mms->pit, errp);
+}
+
+static void microvm_machine_get_rtc(Object *obj, Visitor *v, const char *name,
+                                    void *opaque, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+    OnOffAuto rtc = mms->rtc;
+
+    visit_type_OnOffAuto(v, name, &rtc, errp);
+}
+
+static void microvm_machine_set_rtc(Object *obj, Visitor *v, const char *name,
+                                    void *opaque, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    visit_type_OnOffAuto(v, name, &mms->rtc, errp);
+}
+
+static bool microvm_machine_get_isa_serial(Object *obj, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    return mms->isa_serial;
+}
+
+static void microvm_machine_set_isa_serial(Object *obj, bool value,
+                                           Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    mms->isa_serial = value;
+}
+
+static bool microvm_machine_get_option_roms(Object *obj, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    return mms->option_roms;
+}
+
+static void microvm_machine_set_option_roms(Object *obj, bool value,
+                                            Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    mms->option_roms = value;
+}
+
+static bool microvm_machine_get_auto_kernel_cmdline(Object *obj, Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    return mms->auto_kernel_cmdline;
+}
+
+static void microvm_machine_set_auto_kernel_cmdline(Object *obj, bool value,
+                                                    Error **errp)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    mms->auto_kernel_cmdline = value;
+}
+
+static void microvm_machine_initfn(Object *obj)
+{
+    MicrovmMachineState *mms = MICROVM_MACHINE(obj);
+
+    /* Configuration */
+    mms->pic = ON_OFF_AUTO_AUTO;
+    mms->pit = ON_OFF_AUTO_AUTO;
+    mms->rtc = ON_OFF_AUTO_AUTO;
+    mms->isa_serial = true;
+    mms->option_roms = true;
+    mms->auto_kernel_cmdline = true;
+
+    /* State */
+    mms->kernel_cmdline_fixed = false;
+}
+
+static void microvm_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    mc->init = microvm_machine_state_init;
+
+    mc->family = "microvm_i386";
+    mc->desc = "microvm (i386)";
+    mc->units_per_default_bus = 1;
+    mc->no_floppy = 1;
+    mc->max_cpus = 288;
+    mc->has_hotpluggable_cpus = false;
+    mc->auto_enable_numa_with_memhp = false;
+    mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE;
+    mc->nvdimm_supported = false;
+
+    /* Avoid relying too much on kernel components */
+    mc->default_kernel_irqchip_split = true;
+
+    /* Machine class handlers */
+    mc->reset = microvm_machine_reset;
+
+    object_class_property_add(oc, MICROVM_MACHINE_PIC, "OnOffAuto",
+                              microvm_machine_get_pic,
+                              microvm_machine_set_pic,
+                              NULL, NULL, &error_abort);
+    object_class_property_set_description(oc, MICROVM_MACHINE_PIC,
+        "Enable i8259 PIC", &error_abort);
+
+    object_class_property_add(oc, MICROVM_MACHINE_PIT, "OnOffAuto",
+                              microvm_machine_get_pit,
+                              microvm_machine_set_pit,
+                              NULL, NULL, &error_abort);
+    object_class_property_set_description(oc, MICROVM_MACHINE_PIT,
+        "Enable i8254 PIT", &error_abort);
+
+    object_class_property_add(oc, MICROVM_MACHINE_RTC, "OnOffAuto",
+                              microvm_machine_get_rtc,
+                              microvm_machine_set_rtc,
+                              NULL, NULL, &error_abort);
+    object_class_property_set_description(oc, MICROVM_MACHINE_RTC,
+        "Enable MC146818 RTC", &error_abort);
+
+    object_class_property_add_bool(oc, MICROVM_MACHINE_ISA_SERIAL,
+                                   microvm_machine_get_isa_serial,
+                                   microvm_machine_set_isa_serial,
+                                   &error_abort);
+    object_class_property_set_description(oc, MICROVM_MACHINE_ISA_SERIAL,
+        "Set off to disable the instantiation an ISA serial port",
+        &error_abort);
+
+    object_class_property_add_bool(oc, MICROVM_MACHINE_OPTION_ROMS,
+                                   microvm_machine_get_option_roms,
+                                   microvm_machine_set_option_roms,
+                                   &error_abort);
+    object_class_property_set_description(oc, MICROVM_MACHINE_OPTION_ROMS,
+        "Set off to disable loading option ROMs", &error_abort);
+
+    object_class_property_add_bool(oc, MICROVM_MACHINE_AUTO_KERNEL_CMDLINE,
+                                   microvm_machine_get_auto_kernel_cmdline,
+                                   microvm_machine_set_auto_kernel_cmdline,
+                                   &error_abort);
+    object_class_property_set_description(oc,
+        MICROVM_MACHINE_AUTO_KERNEL_CMDLINE,
+        "Set off to disable adding virtio-mmio devices to the kernel cmdline",
+        &error_abort);
+}
+
+static const TypeInfo microvm_machine_info = {
+    .name          = TYPE_MICROVM_MACHINE,
+    .parent        = TYPE_X86_MACHINE,
+    .instance_size = sizeof(MicrovmMachineState),
+    .instance_init = microvm_machine_initfn,
+    .class_size    = sizeof(MicrovmMachineClass),
+    .class_init    = microvm_class_init,
+    .interfaces = (InterfaceInfo[]) {
+         { }
+    },
+};
+
+static void microvm_machine_init(void)
+{
+    type_register_static(&microvm_machine_info);
+}
+type_init(microvm_machine_init);
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 51b72439b4..b8f02c6f3f 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -24,6 +24,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "hw/i386/x86.h"
 #include "hw/i386/pc.h"
 #include "hw/char/serial.h"
 #include "hw/char/parallel.h"
@@ -68,6 +69,7 @@
 #include "qemu/config-file.h"
 #include "qemu/error-report.h"
 #include "qemu/option.h"
+#include "qemu/cutils.h"
 #include "hw/acpi/acpi.h"
 #include "hw/acpi/cpu_hotplug.h"
 #include "hw/boards.h"
@@ -77,7 +79,6 @@
 #include "qapi/qapi-visit-common.h"
 #include "qapi/visitor.h"
 #include "hw/core/cpu.h"
-#include "hw/nmi.h"
 #include "hw/usb.h"
 #include "hw/i386/intel_iommu.h"
 #include "hw/net/ne2000-isa.h"
@@ -102,9 +103,6 @@
 
 struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
 
-/* Physical Address of PVH entry point read from kernel ELF NOTE */
-static size_t pvh_start_addr;
-
 GlobalProperty pc_compat_4_1[] = {};
 const size_t pc_compat_4_1_len = G_N_ELEMENTS(pc_compat_4_1);
 
@@ -357,6 +355,21 @@ void gsi_handler(void *opaque, int n, int level)
     qemu_set_irq(s->ioapic_irq[n], level);
 }
 
+GSIState *pc_gsi_create(qemu_irq **irqs, bool pci_enabled)
+{
+    GSIState *s;
+
+    s = g_new0(GSIState, 1);
+    if (kvm_ioapic_in_kernel()) {
+        kvm_pc_setup_irq_routing(pci_enabled);
+        *irqs = qemu_allocate_irqs(kvm_pc_gsi_handler, s, GSI_NUM_PINS);
+    } else {
+        *irqs = qemu_allocate_irqs(gsi_handler, s, GSI_NUM_PINS);
+    }
+
+    return s;
+}
+
 static void ioport80_write(void *opaque, hwaddr addr, uint64_t data,
                            unsigned size)
 {
@@ -681,17 +694,18 @@ void pc_cmos_init(PCMachineState *pcms,
 {
     int val;
     static pc_cmos_init_late_arg arg;
+    X86MachineState *x86ms = X86_MACHINE(pcms);
 
     /* various important CMOS locations needed by PC/Bochs bios */
 
     /* memory size */
     /* base memory (first MiB) */
-    val = MIN(pcms->below_4g_mem_size / KiB, 640);
+    val = MIN(x86ms->below_4g_mem_size / KiB, 640);
     rtc_set_memory(s, 0x15, val);
     rtc_set_memory(s, 0x16, val >> 8);
     /* extended memory (next 64MiB) */
-    if (pcms->below_4g_mem_size > 1 * MiB) {
-        val = (pcms->below_4g_mem_size - 1 * MiB) / KiB;
+    if (x86ms->below_4g_mem_size > 1 * MiB) {
+        val = (x86ms->below_4g_mem_size - 1 * MiB) / KiB;
     } else {
         val = 0;
     }
@@ -702,8 +716,8 @@ void pc_cmos_init(PCMachineState *pcms,
     rtc_set_memory(s, 0x30, val);
     rtc_set_memory(s, 0x31, val >> 8);
     /* memory between 16MiB and 4GiB */
-    if (pcms->below_4g_mem_size > 16 * MiB) {
-        val = (pcms->below_4g_mem_size - 16 * MiB) / (64 * KiB);
+    if (x86ms->below_4g_mem_size > 16 * MiB) {
+        val = (x86ms->below_4g_mem_size - 16 * MiB) / (64 * KiB);
     } else {
         val = 0;
     }
@@ -712,14 +726,14 @@ void pc_cmos_init(PCMachineState *pcms,
     rtc_set_memory(s, 0x34, val);
     rtc_set_memory(s, 0x35, val >> 8);
     /* memory above 4GiB */
-    val = pcms->above_4g_mem_size / 65536;
+    val = x86ms->above_4g_mem_size / 65536;
     rtc_set_memory(s, 0x5b, val);
     rtc_set_memory(s, 0x5c, val >> 8);
     rtc_set_memory(s, 0x5d, val >> 16);
 
     object_property_add_link(OBJECT(pcms), "rtc_state",
                              TYPE_ISA_DEVICE,
-                             (Object **)&pcms->rtc,
+                             (Object **)&x86ms->rtc,
                              object_property_allow_set_link,
                              OBJ_PROP_LINK_STRONG, &error_abort);
     object_property_set_link(OBJECT(pcms), OBJECT(s),
@@ -866,478 +880,6 @@ static void handle_a20_line_change(void *opaque, int irq, int level)
     x86_cpu_set_a20(cpu, level);
 }
 
-/* Calculates initial APIC ID for a specific CPU index
- *
- * Currently we need to be able to calculate the APIC ID from the CPU index
- * alone (without requiring a CPU object), as the QEMU<->Seabios interfaces have
- * no concept of "CPU index", and the NUMA tables on fw_cfg need the APIC ID of
- * all CPUs up to max_cpus.
- */
-static uint32_t x86_cpu_apic_id_from_index(PCMachineState *pcms,
-                                           unsigned int cpu_index)
-{
-    MachineState *ms = MACHINE(pcms);
-    PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
-    uint32_t correct_id;
-    static bool warned;
-
-    correct_id = x86_apicid_from_cpu_idx(pcms->smp_dies, ms->smp.cores,
-                                         ms->smp.threads, cpu_index);
-    if (pcmc->compat_apic_id_mode) {
-        if (cpu_index != correct_id && !warned && !qtest_enabled()) {
-            error_report("APIC IDs set in compatibility mode, "
-                         "CPU topology won't match the configuration");
-            warned = true;
-        }
-        return cpu_index;
-    } else {
-        return correct_id;
-    }
-}
-
-static long get_file_size(FILE *f)
-{
-    long where, size;
-
-    /* XXX: on Unix systems, using fstat() probably makes more sense */
-
-    where = ftell(f);
-    fseek(f, 0, SEEK_END);
-    size = ftell(f);
-    fseek(f, where, SEEK_SET);
-
-    return size;
-}
-
-struct setup_data {
-    uint64_t next;
-    uint32_t type;
-    uint32_t len;
-    uint8_t data[0];
-} __attribute__((packed));
-
-
-/*
- * The entry point into the kernel for PVH boot is different from
- * the native entry point.  The PVH entry is defined by the x86/HVM
- * direct boot ABI and is available in an ELFNOTE in the kernel binary.
- *
- * This function is passed to load_elf() when it is called from
- * load_elfboot() which then additionally checks for an ELF Note of
- * type XEN_ELFNOTE_PHYS32_ENTRY and passes it to this function to
- * parse the PVH entry address from the ELF Note.
- *
- * Due to trickery in elf_opts.h, load_elf() is actually available as
- * load_elf32() or load_elf64() and this routine needs to be able
- * to deal with being called as 32 or 64 bit.
- *
- * The address of the PVH entry point is saved to the 'pvh_start_addr'
- * global variable.  (although the entry point is 32-bit, the kernel
- * binary can be either 32-bit or 64-bit).
- */
-static uint64_t read_pvh_start_addr(void *arg1, void *arg2, bool is64)
-{
-    size_t *elf_note_data_addr;
-
-    /* Check if ELF Note header passed in is valid */
-    if (arg1 == NULL) {
-        return 0;
-    }
-
-    if (is64) {
-        struct elf64_note *nhdr64 = (struct elf64_note *)arg1;
-        uint64_t nhdr_size64 = sizeof(struct elf64_note);
-        uint64_t phdr_align = *(uint64_t *)arg2;
-        uint64_t nhdr_namesz = nhdr64->n_namesz;
-
-        elf_note_data_addr =
-            ((void *)nhdr64) + nhdr_size64 +
-            QEMU_ALIGN_UP(nhdr_namesz, phdr_align);
-    } else {
-        struct elf32_note *nhdr32 = (struct elf32_note *)arg1;
-        uint32_t nhdr_size32 = sizeof(struct elf32_note);
-        uint32_t phdr_align = *(uint32_t *)arg2;
-        uint32_t nhdr_namesz = nhdr32->n_namesz;
-
-        elf_note_data_addr =
-            ((void *)nhdr32) + nhdr_size32 +
-            QEMU_ALIGN_UP(nhdr_namesz, phdr_align);
-    }
-
-    pvh_start_addr = *elf_note_data_addr;
-
-    return pvh_start_addr;
-}
-
-static bool load_elfboot(const char *kernel_filename,
-                   int kernel_file_size,
-                   uint8_t *header,
-                   size_t pvh_xen_start_addr,
-                   FWCfgState *fw_cfg)
-{
-    uint32_t flags = 0;
-    uint32_t mh_load_addr = 0;
-    uint32_t elf_kernel_size = 0;
-    uint64_t elf_entry;
-    uint64_t elf_low, elf_high;
-    int kernel_size;
-
-    if (ldl_p(header) != 0x464c457f) {
-        return false; /* no elfboot */
-    }
-
-    bool elf_is64 = header[EI_CLASS] == ELFCLASS64;
-    flags = elf_is64 ?
-        ((Elf64_Ehdr *)header)->e_flags : ((Elf32_Ehdr *)header)->e_flags;
-
-    if (flags & 0x00010004) { /* LOAD_ELF_HEADER_HAS_ADDR */
-        error_report("elfboot unsupported flags = %x", flags);
-        exit(1);
-    }
-
-    uint64_t elf_note_type = XEN_ELFNOTE_PHYS32_ENTRY;
-    kernel_size = load_elf(kernel_filename, read_pvh_start_addr,
-                           NULL, &elf_note_type, &elf_entry,
-                           &elf_low, &elf_high, 0, I386_ELF_MACHINE,
-                           0, 0);
-
-    if (kernel_size < 0) {
-        error_report("Error while loading elf kernel");
-        exit(1);
-    }
-    mh_load_addr = elf_low;
-    elf_kernel_size = elf_high - elf_low;
-
-    if (pvh_start_addr == 0) {
-        error_report("Error loading uncompressed kernel without PVH ELF Note");
-        exit(1);
-    }
-    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ENTRY, pvh_start_addr);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, mh_load_addr);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, elf_kernel_size);
-
-    return true;
-}
-
-static void load_linux(PCMachineState *pcms,
-                       FWCfgState *fw_cfg)
-{
-    uint16_t protocol;
-    int setup_size, kernel_size, cmdline_size;
-    int dtb_size, setup_data_offset;
-    uint32_t initrd_max;
-    uint8_t header[8192], *setup, *kernel;
-    hwaddr real_addr, prot_addr, cmdline_addr, initrd_addr = 0;
-    FILE *f;
-    char *vmode;
-    MachineState *machine = MACHINE(pcms);
-    PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
-    struct setup_data *setup_data;
-    const char *kernel_filename = machine->kernel_filename;
-    const char *initrd_filename = machine->initrd_filename;
-    const char *dtb_filename = machine->dtb;
-    const char *kernel_cmdline = machine->kernel_cmdline;
-
-    /* Align to 16 bytes as a paranoia measure */
-    cmdline_size = (strlen(kernel_cmdline)+16) & ~15;
-
-    /* load the kernel header */
-    f = fopen(kernel_filename, "rb");
-    if (!f || !(kernel_size = get_file_size(f)) ||
-        fread(header, 1, MIN(ARRAY_SIZE(header), kernel_size), f) !=
-        MIN(ARRAY_SIZE(header), kernel_size)) {
-        fprintf(stderr, "qemu: could not load kernel '%s': %s\n",
-                kernel_filename, strerror(errno));
-        exit(1);
-    }
-
-    /* kernel protocol version */
-#if 0
-    fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
-#endif
-    if (ldl_p(header+0x202) == 0x53726448) {
-        protocol = lduw_p(header+0x206);
-    } else {
-        /*
-         * This could be a multiboot kernel. If it is, let's stop treating it
-         * like a Linux kernel.
-         * Note: some multiboot images could be in the ELF format (the same of
-         * PVH), so we try multiboot first since we check the multiboot magic
-         * header before to load it.
-         */
-        if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
-                           kernel_cmdline, kernel_size, header)) {
-            return;
-        }
-        /*
-         * Check if the file is an uncompressed kernel file (ELF) and load it,
-         * saving the PVH entry point used by the x86/HVM direct boot ABI.
-         * If load_elfboot() is successful, populate the fw_cfg info.
-         */
-        if (pcmc->pvh_enabled &&
-            load_elfboot(kernel_filename, kernel_size,
-                         header, pvh_start_addr, fw_cfg)) {
-            fclose(f);
-
-            fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE,
-                strlen(kernel_cmdline) + 1);
-            fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline);
-
-            fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, sizeof(header));
-            fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA,
-                             header, sizeof(header));
-
-            /* load initrd */
-            if (initrd_filename) {
-                GMappedFile *mapped_file;
-                gsize initrd_size;
-                gchar *initrd_data;
-                GError *gerr = NULL;
-
-                mapped_file = g_mapped_file_new(initrd_filename, false, &gerr);
-                if (!mapped_file) {
-                    fprintf(stderr, "qemu: error reading initrd %s: %s\n",
-                            initrd_filename, gerr->message);
-                    exit(1);
-                }
-                pcms->initrd_mapped_file = mapped_file;
-
-                initrd_data = g_mapped_file_get_contents(mapped_file);
-                initrd_size = g_mapped_file_get_length(mapped_file);
-                initrd_max = pcms->below_4g_mem_size - pcmc->acpi_data_size - 1;
-                if (initrd_size >= initrd_max) {
-                    fprintf(stderr, "qemu: initrd is too large, cannot support."
-                            "(max: %"PRIu32", need %"PRId64")\n",
-                            initrd_max, (uint64_t)initrd_size);
-                    exit(1);
-                }
-
-                initrd_addr = (initrd_max - initrd_size) & ~4095;
-
-                fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_addr);
-                fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
-                fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data,
-                                 initrd_size);
-            }
-
-            option_rom[nb_option_roms].bootindex = 0;
-            option_rom[nb_option_roms].name = "pvh.bin";
-            nb_option_roms++;
-
-            return;
-        }
-        protocol = 0;
-    }
-
-    if (protocol < 0x200 || !(header[0x211] & 0x01)) {
-        /* Low kernel */
-        real_addr    = 0x90000;
-        cmdline_addr = 0x9a000 - cmdline_size;
-        prot_addr    = 0x10000;
-    } else if (protocol < 0x202) {
-        /* High but ancient kernel */
-        real_addr    = 0x90000;
-        cmdline_addr = 0x9a000 - cmdline_size;
-        prot_addr    = 0x100000;
-    } else {
-        /* High and recent kernel */
-        real_addr    = 0x10000;
-        cmdline_addr = 0x20000;
-        prot_addr    = 0x100000;
-    }
-
-#if 0
-    fprintf(stderr,
-            "qemu: real_addr     = 0x" TARGET_FMT_plx "\n"
-            "qemu: cmdline_addr  = 0x" TARGET_FMT_plx "\n"
-            "qemu: prot_addr     = 0x" TARGET_FMT_plx "\n",
-            real_addr,
-            cmdline_addr,
-            prot_addr);
-#endif
-
-    /* highest address for loading the initrd */
-    if (protocol >= 0x20c &&
-        lduw_p(header+0x236) & XLF_CAN_BE_LOADED_ABOVE_4G) {
-        /*
-         * Linux has supported initrd up to 4 GB for a very long time (2007,
-         * long before XLF_CAN_BE_LOADED_ABOVE_4G which was added in 2013),
-         * though it only sets initrd_max to 2 GB to "work around bootloader
-         * bugs". Luckily, QEMU firmware(which does something like bootloader)
-         * has supported this.
-         *
-         * It's believed that if XLF_CAN_BE_LOADED_ABOVE_4G is set, initrd can
-         * be loaded into any address.
-         *
-         * In addition, initrd_max is uint32_t simply because QEMU doesn't
-         * support the 64-bit boot protocol (specifically the ext_ramdisk_image
-         * field).
-         *
-         * Therefore here just limit initrd_max to UINT32_MAX simply as well.
-         */
-        initrd_max = UINT32_MAX;
-    } else if (protocol >= 0x203) {
-        initrd_max = ldl_p(header+0x22c);
-    } else {
-        initrd_max = 0x37ffffff;
-    }
-
-    if (initrd_max >= pcms->below_4g_mem_size - pcmc->acpi_data_size) {
-        initrd_max = pcms->below_4g_mem_size - pcmc->acpi_data_size - 1;
-    }
-
-    fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_ADDR, cmdline_addr);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(kernel_cmdline)+1);
-    fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline);
-
-    if (protocol >= 0x202) {
-        stl_p(header+0x228, cmdline_addr);
-    } else {
-        stw_p(header+0x20, 0xA33F);
-        stw_p(header+0x22, cmdline_addr-real_addr);
-    }
-
-    /* handle vga= parameter */
-    vmode = strstr(kernel_cmdline, "vga=");
-    if (vmode) {
-        unsigned int video_mode;
-        /* skip "vga=" */
-        vmode += 4;
-        if (!strncmp(vmode, "normal", 6)) {
-            video_mode = 0xffff;
-        } else if (!strncmp(vmode, "ext", 3)) {
-            video_mode = 0xfffe;
-        } else if (!strncmp(vmode, "ask", 3)) {
-            video_mode = 0xfffd;
-        } else {
-            video_mode = strtol(vmode, NULL, 0);
-        }
-        stw_p(header+0x1fa, video_mode);
-    }
-
-    /* loader type */
-    /* High nybble = B reserved for QEMU; low nybble is revision number.
-       If this code is substantially changed, you may want to consider
-       incrementing the revision. */
-    if (protocol >= 0x200) {
-        header[0x210] = 0xB0;
-    }
-    /* heap */
-    if (protocol >= 0x201) {
-        header[0x211] |= 0x80;	/* CAN_USE_HEAP */
-        stw_p(header+0x224, cmdline_addr-real_addr-0x200);
-    }
-
-    /* load initrd */
-    if (initrd_filename) {
-        GMappedFile *mapped_file;
-        gsize initrd_size;
-        gchar *initrd_data;
-        GError *gerr = NULL;
-
-        if (protocol < 0x200) {
-            fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
-            exit(1);
-        }
-
-        mapped_file = g_mapped_file_new(initrd_filename, false, &gerr);
-        if (!mapped_file) {
-            fprintf(stderr, "qemu: error reading initrd %s: %s\n",
-                    initrd_filename, gerr->message);
-            exit(1);
-        }
-        pcms->initrd_mapped_file = mapped_file;
-
-        initrd_data = g_mapped_file_get_contents(mapped_file);
-        initrd_size = g_mapped_file_get_length(mapped_file);
-        if (initrd_size >= initrd_max) {
-            fprintf(stderr, "qemu: initrd is too large, cannot support."
-                    "(max: %"PRIu32", need %"PRId64")\n",
-                    initrd_max, (uint64_t)initrd_size);
-            exit(1);
-        }
-
-        initrd_addr = (initrd_max-initrd_size) & ~4095;
-
-        fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_addr);
-        fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
-        fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data, initrd_size);
-
-        stl_p(header+0x218, initrd_addr);
-        stl_p(header+0x21c, initrd_size);
-    }
-
-    /* load kernel and setup */
-    setup_size = header[0x1f1];
-    if (setup_size == 0) {
-        setup_size = 4;
-    }
-    setup_size = (setup_size+1)*512;
-    if (setup_size > kernel_size) {
-        fprintf(stderr, "qemu: invalid kernel header\n");
-        exit(1);
-    }
-    kernel_size -= setup_size;
-
-    setup  = g_malloc(setup_size);
-    kernel = g_malloc(kernel_size);
-    fseek(f, 0, SEEK_SET);
-    if (fread(setup, 1, setup_size, f) != setup_size) {
-        fprintf(stderr, "fread() failed\n");
-        exit(1);
-    }
-    if (fread(kernel, 1, kernel_size, f) != kernel_size) {
-        fprintf(stderr, "fread() failed\n");
-        exit(1);
-    }
-    fclose(f);
-
-    /* append dtb to kernel */
-    if (dtb_filename) {
-        if (protocol < 0x209) {
-            fprintf(stderr, "qemu: Linux kernel too old to load a dtb\n");
-            exit(1);
-        }
-
-        dtb_size = get_image_size(dtb_filename);
-        if (dtb_size <= 0) {
-            fprintf(stderr, "qemu: error reading dtb %s: %s\n",
-                    dtb_filename, strerror(errno));
-            exit(1);
-        }
-
-        setup_data_offset = QEMU_ALIGN_UP(kernel_size, 16);
-        kernel_size = setup_data_offset + sizeof(struct setup_data) + dtb_size;
-        kernel = g_realloc(kernel, kernel_size);
-
-        stq_p(header+0x250, prot_addr + setup_data_offset);
-
-        setup_data = (struct setup_data *)(kernel + setup_data_offset);
-        setup_data->next = 0;
-        setup_data->type = cpu_to_le32(SETUP_DTB);
-        setup_data->len = cpu_to_le32(dtb_size);
-
-        load_image_size(dtb_filename, setup_data->data, dtb_size);
-    }
-
-    memcpy(setup, header, MIN(sizeof(header), setup_size));
-
-    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
-    fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size);
-
-    fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, setup_size);
-    fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA, setup, setup_size);
-
-    option_rom[nb_option_roms].bootindex = 0;
-    option_rom[nb_option_roms].name = "linuxboot.bin";
-    if (pcmc->linuxboot_dma_enabled && fw_cfg_dma_enabled(fw_cfg)) {
-        option_rom[nb_option_roms].name = "linuxboot_dma.bin";
-    }
-    nb_option_roms++;
-}
-
 #define NE2000_NB_MAX 6
 
 static const int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360,
@@ -1374,31 +916,13 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
     }
 }
 
-static void pc_new_cpu(PCMachineState *pcms, int64_t apic_id, Error **errp)
-{
-    Object *cpu = NULL;
-    Error *local_err = NULL;
-    CPUX86State *env = NULL;
-
-    cpu = object_new(MACHINE(pcms)->cpu_type);
-
-    env = &X86_CPU(cpu)->env;
-    env->nr_dies = pcms->smp_dies;
-
-    object_property_set_uint(cpu, apic_id, "apic-id", &local_err);
-    object_property_set_bool(cpu, true, "realized", &local_err);
-
-    object_unref(cpu);
-    error_propagate(errp, local_err);
-}
-
 /*
  * This function is very similar to smp_parse()
  * in hw/core/machine.c but includes CPU die support.
  */
 void pc_smp_parse(MachineState *ms, QemuOpts *opts)
 {
-    PCMachineState *pcms = PC_MACHINE(ms);
+    X86MachineState *x86ms = X86_MACHINE(ms);
 
     if (opts) {
         unsigned cpus    = qemu_opt_get_number(opts, "cpus", 0);
@@ -1462,7 +986,7 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts)
         ms->smp.cpus = cpus;
         ms->smp.cores = cores;
         ms->smp.threads = threads;
-        pcms->smp_dies = dies;
+        x86ms->smp_dies = dies;
     }
 
     if (ms->smp.cpus > 1) {
@@ -1474,8 +998,8 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts)
 
 void pc_hot_add_cpu(MachineState *ms, const int64_t id, Error **errp)
 {
-    PCMachineState *pcms = PC_MACHINE(ms);
-    int64_t apic_id = x86_cpu_apic_id_from_index(pcms, id);
+    X86MachineState *x86ms = X86_MACHINE(ms);
+    int64_t apic_id = x86_cpu_apic_id_from_index(x86ms, id);
     Error *local_err = NULL;
 
     if (id < 0) {
@@ -1490,38 +1014,14 @@ void pc_hot_add_cpu(MachineState *ms, const int64_t id, Error **errp)
         return;
     }
 
-    pc_new_cpu(PC_MACHINE(ms), apic_id, &local_err);
+
+    x86_cpu_new(X86_MACHINE(ms), apic_id, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
     }
 }
 
-void pc_cpus_init(PCMachineState *pcms)
-{
-    int i;
-    const CPUArchIdList *possible_cpus;
-    MachineState *ms = MACHINE(pcms);
-    MachineClass *mc = MACHINE_GET_CLASS(pcms);
-    PCMachineClass *pcmc = PC_MACHINE_CLASS(mc);
-
-    x86_cpu_set_default_version(pcmc->default_cpu_version);
-
-    /* Calculates the limit to CPU APIC ID values
-     *
-     * Limit for the APIC ID value, so that all
-     * CPU APIC IDs are < pcms->apic_id_limit.
-     *
-     * This is used for FW_CFG_MAX_CPUS. See comments on fw_cfg_arch_create().
-     */
-    pcms->apic_id_limit = x86_cpu_apic_id_from_index(pcms,
-                                                     ms->smp.max_cpus - 1) + 1;
-    possible_cpus = mc->possible_cpu_arch_ids(ms);
-    for (i = 0; i < ms->smp.cpus; i++) {
-        pc_new_cpu(pcms, possible_cpus->cpus[i].arch_id, &error_fatal);
-    }
-}
-
 static void rtc_set_cpus_count(ISADevice *rtc, uint16_t cpus_count)
 {
     if (cpus_count > 0xff) {
@@ -1540,10 +1040,11 @@ void pc_machine_done(Notifier *notifier, void *data)
 {
     PCMachineState *pcms = container_of(notifier,
                                         PCMachineState, machine_done);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
     PCIBus *bus = pcms->bus;
 
     /* set the number of CPUs */
-    rtc_set_cpus_count(pcms->rtc, pcms->boot_cpus);
+    rtc_set_cpus_count(x86ms->rtc, x86ms->boot_cpus);
 
     if (bus) {
         int extra_hosts = 0;
@@ -1554,23 +1055,23 @@ void pc_machine_done(Notifier *notifier, void *data)
                 extra_hosts++;
             }
         }
-        if (extra_hosts && pcms->fw_cfg) {
+        if (extra_hosts && x86ms->fw_cfg) {
             uint64_t *val = g_malloc(sizeof(*val));
             *val = cpu_to_le64(extra_hosts);
-            fw_cfg_add_file(pcms->fw_cfg,
+            fw_cfg_add_file(x86ms->fw_cfg,
                     "etc/extra-pci-roots", val, sizeof(*val));
         }
     }
 
     acpi_setup();
-    if (pcms->fw_cfg) {
-        fw_cfg_build_smbios(MACHINE(pcms), pcms->fw_cfg);
-        fw_cfg_build_feature_control(MACHINE(pcms), pcms->fw_cfg);
+    if (x86ms->fw_cfg) {
+        fw_cfg_build_smbios(MACHINE(pcms), x86ms->fw_cfg);
+        fw_cfg_build_feature_control(MACHINE(pcms), x86ms->fw_cfg);
         /* update FW_CFG_NB_CPUS to account for -device added CPUs */
-        fw_cfg_modify_i16(pcms->fw_cfg, FW_CFG_NB_CPUS, pcms->boot_cpus);
+        fw_cfg_modify_i16(x86ms->fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
     }
 
-    if (pcms->apic_id_limit > 255 && !xen_enabled()) {
+    if (x86ms->apic_id_limit > 255 && !xen_enabled()) {
         IntelIOMMUState *iommu = INTEL_IOMMU_DEVICE(x86_iommu_get_default());
 
         if (!iommu || !x86_iommu_ir_supported(X86_IOMMU_DEVICE(iommu)) ||
@@ -1588,8 +1089,9 @@ void pc_guest_info_init(PCMachineState *pcms)
 {
     int i;
     MachineState *ms = MACHINE(pcms);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
 
-    pcms->apic_xrupt_override = kvm_allows_irq0_override();
+    x86ms->apic_xrupt_override = kvm_allows_irq0_override();
     pcms->numa_nodes = ms->numa_state->num_nodes;
     pcms->node_mem = g_malloc0(pcms->numa_nodes *
                                     sizeof *pcms->node_mem);
@@ -1614,14 +1116,17 @@ void xen_load_linux(PCMachineState *pcms)
 {
     int i;
     FWCfgState *fw_cfg;
+    PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
 
     assert(MACHINE(pcms)->kernel_filename != NULL);
 
     fw_cfg = fw_cfg_init_io(FW_CFG_IO_BASE);
-    fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, pcms->boot_cpus);
+    fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
     rom_set_fw(fw_cfg);
 
-    load_linux(pcms, fw_cfg);
+    x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
+                   pcmc->pvh_enabled, pcmc->linuxboot_dma_enabled);
     for (i = 0; i < nb_option_roms; i++) {
         assert(!strcmp(option_rom[i].name, "linuxboot.bin") ||
                !strcmp(option_rom[i].name, "linuxboot_dma.bin") ||
@@ -1629,7 +1134,7 @@ void xen_load_linux(PCMachineState *pcms)
                !strcmp(option_rom[i].name, "multiboot.bin"));
         rom_add_option(option_rom[i].name, option_rom[i].bootindex);
     }
-    pcms->fw_cfg = fw_cfg;
+    x86ms->fw_cfg = fw_cfg;
 }
 
 void pc_memory_init(PCMachineState *pcms,
@@ -1644,9 +1149,10 @@ void pc_memory_init(PCMachineState *pcms,
     MachineState *machine = MACHINE(pcms);
     MachineClass *mc = MACHINE_GET_CLASS(machine);
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
 
-    assert(machine->ram_size == pcms->below_4g_mem_size +
-                                pcms->above_4g_mem_size);
+    assert(machine->ram_size == x86ms->below_4g_mem_size +
+                                x86ms->above_4g_mem_size);
 
     linux_boot = (machine->kernel_filename != NULL);
 
@@ -1660,17 +1166,17 @@ void pc_memory_init(PCMachineState *pcms,
     *ram_memory = ram;
     ram_below_4g = g_malloc(sizeof(*ram_below_4g));
     memory_region_init_alias(ram_below_4g, NULL, "ram-below-4g", ram,
-                             0, pcms->below_4g_mem_size);
+                             0, x86ms->below_4g_mem_size);
     memory_region_add_subregion(system_memory, 0, ram_below_4g);
-    e820_add_entry(0, pcms->below_4g_mem_size, E820_RAM);
-    if (pcms->above_4g_mem_size > 0) {
+    e820_add_entry(0, x86ms->below_4g_mem_size, E820_RAM);
+    if (x86ms->above_4g_mem_size > 0) {
         ram_above_4g = g_malloc(sizeof(*ram_above_4g));
         memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", ram,
-                                 pcms->below_4g_mem_size,
-                                 pcms->above_4g_mem_size);
+                                 x86ms->below_4g_mem_size,
+                                 x86ms->above_4g_mem_size);
         memory_region_add_subregion(system_memory, 0x100000000ULL,
                                     ram_above_4g);
-        e820_add_entry(0x100000000ULL, pcms->above_4g_mem_size, E820_RAM);
+        e820_add_entry(0x100000000ULL, x86ms->above_4g_mem_size, E820_RAM);
     }
 
     if (!pcmc->has_reserved_memory &&
@@ -1704,7 +1210,7 @@ void pc_memory_init(PCMachineState *pcms,
         }
 
         machine->device_memory->base =
-            ROUND_UP(0x100000000ULL + pcms->above_4g_mem_size, 1 * GiB);
+            ROUND_UP(0x100000000ULL + x86ms->above_4g_mem_size, 1 * GiB);
 
         if (pcmc->enforce_aligned_dimm) {
             /* size device region assuming 1G page max alignment per slot */
@@ -1739,7 +1245,7 @@ void pc_memory_init(PCMachineState *pcms,
                                         1);
 
     fw_cfg = fw_cfg_arch_create(machine,
-                                pcms->boot_cpus, pcms->apic_id_limit);
+                                x86ms->boot_cpus, x86ms->apic_id_limit);
 
     rom_set_fw(fw_cfg);
 
@@ -1756,16 +1262,17 @@ void pc_memory_init(PCMachineState *pcms,
     }
 
     if (linux_boot) {
-        load_linux(pcms, fw_cfg);
+        x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
+                       pcmc->pvh_enabled, pcmc->linuxboot_dma_enabled);
     }
 
     for (i = 0; i < nb_option_roms; i++) {
         rom_add_option(option_rom[i].name, option_rom[i].bootindex);
     }
-    pcms->fw_cfg = fw_cfg;
+    x86ms->fw_cfg = fw_cfg;
 
     /* Init default IOAPIC address space */
-    pcms->ioapic_as = &address_space_memory;
+    x86ms->ioapic_as = &address_space_memory;
 
     /* Init ACPI memory hotplug IO base address */
     pcms->memhp_io_base = ACPI_MEMORY_HOTPLUG_BASE;
@@ -1780,6 +1287,7 @@ uint64_t pc_pci_hole64_start(void)
     PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
     MachineState *ms = MACHINE(pcms);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
     uint64_t hole64_start = 0;
 
     if (pcmc->has_reserved_memory && ms->device_memory->base) {
@@ -1788,7 +1296,7 @@ uint64_t pc_pci_hole64_start(void)
             hole64_start += memory_region_size(&ms->device_memory->mr);
         }
     } else {
-        hole64_start = 0x100000000ULL + pcms->above_4g_mem_size;
+        hole64_start = 0x100000000ULL + x86ms->above_4g_mem_size;
     }
 
     return ROUND_UP(hole64_start, 1 * GiB);
@@ -1966,6 +1474,25 @@ void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus)
     rom_reset_order_override();
 }
 
+void pc_i8259_create(ISABus *isa_bus, qemu_irq *i8259_irqs)
+{
+    qemu_irq *i8259;
+
+    if (kvm_pic_in_kernel()) {
+        i8259 = kvm_i8259_init(isa_bus);
+    } else if (xen_enabled()) {
+        i8259 = xen_interrupt_controller_init();
+    } else {
+        i8259 = i8259_init(isa_bus, pc_allocate_cpu_irq());
+    }
+
+    for (size_t i = 0; i < ISA_NUM_IRQS; i++) {
+        i8259_irqs[i] = i8259[i];
+    }
+
+    g_free(i8259);
+}
+
 void ioapic_init_gsi(GSIState *gsi_state, const char *parent_name)
 {
     DeviceState *dev;
@@ -2127,6 +1654,7 @@ static void pc_cpu_plug(HotplugHandler *hotplug_dev,
     Error *local_err = NULL;
     X86CPU *cpu = X86_CPU(dev);
     PCMachineState *pcms = PC_MACHINE(hotplug_dev);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
 
     if (pcms->acpi_dev) {
         hotplug_handler_plug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
@@ -2136,12 +1664,12 @@ static void pc_cpu_plug(HotplugHandler *hotplug_dev,
     }
 
     /* increment the number of CPUs */
-    pcms->boot_cpus++;
-    if (pcms->rtc) {
-        rtc_set_cpus_count(pcms->rtc, pcms->boot_cpus);
+    x86ms->boot_cpus++;
+    if (x86ms->rtc) {
+        rtc_set_cpus_count(x86ms->rtc, x86ms->boot_cpus);
     }
-    if (pcms->fw_cfg) {
-        fw_cfg_modify_i16(pcms->fw_cfg, FW_CFG_NB_CPUS, pcms->boot_cpus);
+    if (x86ms->fw_cfg) {
+        fw_cfg_modify_i16(x86ms->fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
     }
 
     found_cpu = pc_find_cpu_slot(MACHINE(pcms), cpu->apic_id, NULL);
@@ -2187,6 +1715,7 @@ static void pc_cpu_unplug_cb(HotplugHandler *hotplug_dev,
     Error *local_err = NULL;
     X86CPU *cpu = X86_CPU(dev);
     PCMachineState *pcms = PC_MACHINE(hotplug_dev);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
 
     hotplug_handler_unplug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
     if (local_err) {
@@ -2198,10 +1727,10 @@ static void pc_cpu_unplug_cb(HotplugHandler *hotplug_dev,
     object_property_set_bool(OBJECT(dev), false, "realized", NULL);
 
     /* decrement the number of CPUs */
-    pcms->boot_cpus--;
+    x86ms->boot_cpus--;
     /* Update the number of CPUs in CMOS */
-    rtc_set_cpus_count(pcms->rtc, pcms->boot_cpus);
-    fw_cfg_modify_i16(pcms->fw_cfg, FW_CFG_NB_CPUS, pcms->boot_cpus);
+    rtc_set_cpus_count(x86ms->rtc, x86ms->boot_cpus);
+    fw_cfg_modify_i16(x86ms->fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
  out:
     error_propagate(errp, local_err);
 }
@@ -2217,6 +1746,7 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
     CPUX86State *env = &cpu->env;
     MachineState *ms = MACHINE(hotplug_dev);
     PCMachineState *pcms = PC_MACHINE(hotplug_dev);
+    X86MachineState *x86ms = X86_MACHINE(pcms);
     unsigned int smp_cores = ms->smp.cores;
     unsigned int smp_threads = ms->smp.threads;
 
@@ -2226,7 +1756,7 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
         return;
     }
 
-    env->nr_dies = pcms->smp_dies;
+    env->nr_dies = x86ms->smp_dies;
 
     /*
      * If APIC ID is not set,
@@ -2234,13 +1764,13 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
      */
     if (cpu->apic_id == UNASSIGNED_APIC_ID) {
         int max_socket = (ms->smp.max_cpus - 1) /
-                                smp_threads / smp_cores / pcms->smp_dies;
+                                smp_threads / smp_cores / x86ms->smp_dies;
 
         /*
          * die-id was optional in QEMU 4.0 and older, so keep it optional
          * if there's only one die per socket.
          */
-        if (cpu->die_id < 0 && pcms->smp_dies == 1) {
+        if (cpu->die_id < 0 && x86ms->smp_dies == 1) {
             cpu->die_id = 0;
         }
 
@@ -2255,9 +1785,9 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
         if (cpu->die_id < 0) {
             error_setg(errp, "CPU die-id is not set");
             return;
-        } else if (cpu->die_id > pcms->smp_dies - 1) {
+        } else if (cpu->die_id > x86ms->smp_dies - 1) {
             error_setg(errp, "Invalid CPU die-id: %u must be in range 0:%u",
-                       cpu->die_id, pcms->smp_dies - 1);
+                       cpu->die_id, x86ms->smp_dies - 1);
             return;
         }
         if (cpu->core_id < 0) {
@@ -2281,7 +1811,7 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
         topo.die_id = cpu->die_id;
         topo.core_id = cpu->core_id;
         topo.smt_id = cpu->thread_id;
-        cpu->apic_id = apicid_from_topo_ids(pcms->smp_dies, smp_cores,
+        cpu->apic_id = apicid_from_topo_ids(x86ms->smp_dies, smp_cores,
                                             smp_threads, &topo);
     }
 
@@ -2289,7 +1819,7 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
     if (!cpu_slot) {
         MachineState *ms = MACHINE(pcms);
 
-        x86_topo_ids_from_apicid(cpu->apic_id, pcms->smp_dies,
+        x86_topo_ids_from_apicid(cpu->apic_id, x86ms->smp_dies,
                                  smp_cores, smp_threads, &topo);
         error_setg(errp,
             "Invalid CPU [socket: %u, die: %u, core: %u, thread: %u] with"
@@ -2311,7 +1841,7 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
     /* TODO: move socket_id/core_id/thread_id checks into x86_cpu_realizefn()
      * once -smp refactoring is complete and there will be CPU private
      * CPUState::nr_cores and CPUState::nr_threads fields instead of globals */
-    x86_topo_ids_from_apicid(cpu->apic_id, pcms->smp_dies,
+    x86_topo_ids_from_apicid(cpu->apic_id, x86ms->smp_dies,
                              smp_cores, smp_threads, &topo);
     if (cpu->socket_id != -1 && cpu->socket_id != topo.pkg_id) {
         error_setg(errp, "property socket-id: %u doesn't match set apic-id:"
@@ -2493,45 +2023,6 @@ pc_machine_get_device_memory_region_size(Object *obj, Visitor *v,
     visit_type_int(v, name, &value, errp);
 }
 
-static void pc_machine_get_max_ram_below_4g(Object *obj, Visitor *v,
-                                            const char *name, void *opaque,
-                                            Error **errp)
-{
-    PCMachineState *pcms = PC_MACHINE(obj);
-    uint64_t value = pcms->max_ram_below_4g;
-
-    visit_type_size(v, name, &value, errp);
-}
-
-static void pc_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
-                                            const char *name, void *opaque,
-                                            Error **errp)
-{
-    PCMachineState *pcms = PC_MACHINE(obj);
-    Error *error = NULL;
-    uint64_t value;
-
-    visit_type_size(v, name, &value, &error);
-    if (error) {
-        error_propagate(errp, error);
-        return;
-    }
-    if (value > 4 * GiB) {
-        error_setg(&error,
-                   "Machine option 'max-ram-below-4g=%"PRIu64
-                   "' expects size less than or equal to 4G", value);
-        error_propagate(errp, error);
-        return;
-    }
-
-    if (value < 1 * MiB) {
-        warn_report("Only %" PRIu64 " bytes of RAM below the 4GiB boundary,"
-                    "BIOS may not work with less than 1MiB", value);
-    }
-
-    pcms->max_ram_below_4g = value;
-}
-
 static void pc_machine_get_vmport(Object *obj, Visitor *v, const char *name,
                                   void *opaque, Error **errp)
 {
@@ -2637,7 +2128,6 @@ static void pc_machine_initfn(Object *obj)
 {
     PCMachineState *pcms = PC_MACHINE(obj);
 
-    pcms->max_ram_below_4g = 0; /* use default */
     pcms->smm = ON_OFF_AUTO_AUTO;
 #ifdef CONFIG_VMPORT
     pcms->vmport = ON_OFF_AUTO_AUTO;
@@ -2649,7 +2139,6 @@ static void pc_machine_initfn(Object *obj)
     pcms->smbus_enabled = true;
     pcms->sata_enabled = true;
     pcms->pit_enabled = true;
-    pcms->smp_dies = 1;
 
     pc_system_flash_create(pcms);
 }
@@ -2680,86 +2169,6 @@ static void pc_machine_wakeup(MachineState *machine)
     cpu_synchronize_all_post_reset();
 }
 
-static CpuInstanceProperties
-pc_cpu_index_to_props(MachineState *ms, unsigned cpu_index)
-{
-    MachineClass *mc = MACHINE_GET_CLASS(ms);
-    const CPUArchIdList *possible_cpus = mc->possible_cpu_arch_ids(ms);
-
-    assert(cpu_index < possible_cpus->len);
-    return possible_cpus->cpus[cpu_index].props;
-}
-
-static int64_t pc_get_default_cpu_node_id(const MachineState *ms, int idx)
-{
-   X86CPUTopoInfo topo;
-   PCMachineState *pcms = PC_MACHINE(ms);
-
-   assert(idx < ms->possible_cpus->len);
-   x86_topo_ids_from_apicid(ms->possible_cpus->cpus[idx].arch_id,
-                            pcms->smp_dies, ms->smp.cores,
-                            ms->smp.threads, &topo);
-   return topo.pkg_id % ms->numa_state->num_nodes;
-}
-
-static const CPUArchIdList *pc_possible_cpu_arch_ids(MachineState *ms)
-{
-    PCMachineState *pcms = PC_MACHINE(ms);
-    int i;
-    unsigned int max_cpus = ms->smp.max_cpus;
-
-    if (ms->possible_cpus) {
-        /*
-         * make sure that max_cpus hasn't changed since the first use, i.e.
-         * -smp hasn't been parsed after it
-        */
-        assert(ms->possible_cpus->len == max_cpus);
-        return ms->possible_cpus;
-    }
-
-    ms->possible_cpus = g_malloc0(sizeof(CPUArchIdList) +
-                                  sizeof(CPUArchId) * max_cpus);
-    ms->possible_cpus->len = max_cpus;
-    for (i = 0; i < ms->possible_cpus->len; i++) {
-        X86CPUTopoInfo topo;
-
-        ms->possible_cpus->cpus[i].type = ms->cpu_type;
-        ms->possible_cpus->cpus[i].vcpus_count = 1;
-        ms->possible_cpus->cpus[i].arch_id = x86_cpu_apic_id_from_index(pcms, i);
-        x86_topo_ids_from_apicid(ms->possible_cpus->cpus[i].arch_id,
-                                 pcms->smp_dies, ms->smp.cores,
-                                 ms->smp.threads, &topo);
-        ms->possible_cpus->cpus[i].props.has_socket_id = true;
-        ms->possible_cpus->cpus[i].props.socket_id = topo.pkg_id;
-        if (pcms->smp_dies > 1) {
-            ms->possible_cpus->cpus[i].props.has_die_id = true;
-            ms->possible_cpus->cpus[i].props.die_id = topo.die_id;
-        }
-        ms->possible_cpus->cpus[i].props.has_core_id = true;
-        ms->possible_cpus->cpus[i].props.core_id = topo.core_id;
-        ms->possible_cpus->cpus[i].props.has_thread_id = true;
-        ms->possible_cpus->cpus[i].props.thread_id = topo.smt_id;
-    }
-    return ms->possible_cpus;
-}
-
-static void x86_nmi(NMIState *n, int cpu_index, Error **errp)
-{
-    /* cpu index isn't used */
-    CPUState *cs;
-
-    CPU_FOREACH(cs) {
-        X86CPU *cpu = X86_CPU(cs);
-
-        if (!cpu->apic_state) {
-            cpu_interrupt(cs, CPU_INTERRUPT_NMI);
-        } else {
-            apic_deliver_nmi(cpu->apic_state);
-        }
-    }
-}
-
-
 static bool pc_hotplug_allowed(MachineState *ms, DeviceState *dev, Error **errp)
 {
     X86IOMMUState *iommu = x86_iommu_get_default();
@@ -2784,7 +2193,6 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     MachineClass *mc = MACHINE_CLASS(oc);
     PCMachineClass *pcmc = PC_MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
-    NMIClass *nc = NMI_CLASS(oc);
 
     pcmc->pci_enabled = true;
     pcmc->has_acpi_build = true;
@@ -2804,9 +2212,9 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     assert(!mc->get_hotplug_handler);
     mc->get_hotplug_handler = pc_get_hotplug_handler;
     mc->hotplug_allowed = pc_hotplug_allowed;
-    mc->cpu_index_to_instance_props = pc_cpu_index_to_props;
-    mc->get_default_cpu_node_id = pc_get_default_cpu_node_id;
-    mc->possible_cpu_arch_ids = pc_possible_cpu_arch_ids;
+    mc->cpu_index_to_instance_props = x86_cpu_index_to_props;
+    mc->get_default_cpu_node_id = x86_get_default_cpu_node_id;
+    mc->possible_cpu_arch_ids = x86_possible_cpu_arch_ids;
     mc->auto_enable_numa_with_memhp = true;
     mc->has_hotpluggable_cpus = true;
     mc->default_boot_order = "cad";
@@ -2820,7 +2228,6 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     hc->plug = pc_machine_device_plug_cb;
     hc->unplug_request = pc_machine_device_unplug_request_cb;
     hc->unplug = pc_machine_device_unplug_cb;
-    nc->nmi_monitor_handler = x86_nmi;
     mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE;
     mc->nvdimm_supported = true;
     mc->numa_mem_supported = true;
@@ -2829,13 +2236,6 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
         pc_machine_get_device_memory_region_size, NULL,
         NULL, NULL, &error_abort);
 
-    object_class_property_add(oc, PC_MACHINE_MAX_RAM_BELOW_4G, "size",
-        pc_machine_get_max_ram_below_4g, pc_machine_set_max_ram_below_4g,
-        NULL, NULL, &error_abort);
-
-    object_class_property_set_description(oc, PC_MACHINE_MAX_RAM_BELOW_4G,
-        "Maximum ram below the 4G boundary (32bit boundary)", &error_abort);
-
     object_class_property_add(oc, PC_MACHINE_SMM, "OnOffAuto",
         pc_machine_get_smm, pc_machine_set_smm,
         NULL, NULL, &error_abort);
@@ -2860,7 +2260,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo pc_machine_info = {
     .name = TYPE_PC_MACHINE,
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_X86_MACHINE,
     .abstract = true,
     .instance_size = sizeof(PCMachineState),
     .instance_init = pc_machine_initfn,
@@ -2868,7 +2268,6 @@ static const TypeInfo pc_machine_info = {
     .class_init = pc_machine_class_init,
     .interfaces = (InterfaceInfo[]) {
          { TYPE_HOTPLUG_HANDLER },
-         { TYPE_NMI },
          { }
     },
 };
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 6824b72124..3a4a64a38d 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -27,6 +27,7 @@
 
 #include "qemu/units.h"
 #include "hw/loader.h"
+#include "hw/i386/x86.h"
 #include "hw/i386/pc.h"
 #include "hw/i386/apic.h"
 #include "hw/display/ramfb.h"
@@ -56,7 +57,6 @@
 #endif
 #include "migration/global_state.h"
 #include "migration/misc.h"
-#include "kvm_i386.h"
 #include "sysemu/numa.h"
 
 #define MAX_IDE_BUS 2
@@ -73,6 +73,7 @@ static void pc_init1(MachineState *machine,
 {
     PCMachineState *pcms = PC_MACHINE(machine);
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
+    X86MachineState *x86ms = X86_MACHINE(machine);
     MemoryRegion *system_memory = get_system_memory();
     MemoryRegion *system_io = get_system_io();
     int i;
@@ -80,7 +81,6 @@ static void pc_init1(MachineState *machine,
     ISABus *isa_bus;
     PCII440FXState *i440fx_state;
     int piix3_devfn = -1;
-    qemu_irq *i8259;
     qemu_irq smi_irq;
     GSIState *gsi_state;
     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
@@ -125,11 +125,11 @@ static void pc_init1(MachineState *machine,
     if (xen_enabled()) {
         xen_hvm_init(pcms, &ram_memory);
     } else {
-        if (!pcms->max_ram_below_4g) {
-            pcms->max_ram_below_4g = 0xe0000000; /* default: 3.5G */
+        if (!x86ms->max_ram_below_4g) {
+            x86ms->max_ram_below_4g = 0xe0000000; /* default: 3.5G */
         }
-        lowmem = pcms->max_ram_below_4g;
-        if (machine->ram_size >= pcms->max_ram_below_4g) {
+        lowmem = x86ms->max_ram_below_4g;
+        if (machine->ram_size >= x86ms->max_ram_below_4g) {
             if (pcmc->gigabyte_align) {
                 if (lowmem > 0xc0000000) {
                     lowmem = 0xc0000000;
@@ -138,21 +138,21 @@ static void pc_init1(MachineState *machine,
                     warn_report("Large machine and max_ram_below_4g "
                                 "(%" PRIu64 ") not a multiple of 1G; "
                                 "possible bad performance.",
-                                pcms->max_ram_below_4g);
+                                x86ms->max_ram_below_4g);
                 }
             }
         }
 
         if (machine->ram_size >= lowmem) {
-            pcms->above_4g_mem_size = machine->ram_size - lowmem;
-            pcms->below_4g_mem_size = lowmem;
+            x86ms->above_4g_mem_size = machine->ram_size - lowmem;
+            x86ms->below_4g_mem_size = lowmem;
         } else {
-            pcms->above_4g_mem_size = 0;
-            pcms->below_4g_mem_size = machine->ram_size;
+            x86ms->above_4g_mem_size = 0;
+            x86ms->below_4g_mem_size = machine->ram_size;
         }
     }
 
-    pc_cpus_init(pcms);
+    x86_cpus_init(x86ms, pcmc->default_cpu_version);
 
     if (kvm_enabled() && pcmc->kvmclock_enabled) {
         kvmclock_create();
@@ -187,22 +187,15 @@ static void pc_init1(MachineState *machine,
         xen_load_linux(pcms);
     }
 
-    gsi_state = g_malloc0(sizeof(*gsi_state));
-    if (kvm_ioapic_in_kernel()) {
-        kvm_pc_setup_irq_routing(pcmc->pci_enabled);
-        pcms->gsi = qemu_allocate_irqs(kvm_pc_gsi_handler, gsi_state,
-                                       GSI_NUM_PINS);
-    } else {
-        pcms->gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS);
-    }
+    gsi_state = pc_gsi_create(&x86ms->gsi, pcmc->pci_enabled);
 
     if (pcmc->pci_enabled) {
         pci_bus = i440fx_init(host_type,
                               pci_type,
-                              &i440fx_state, &piix3_devfn, &isa_bus, pcms->gsi,
+                              &i440fx_state, &piix3_devfn, &isa_bus, x86ms->gsi,
                               system_memory, system_io, machine->ram_size,
-                              pcms->below_4g_mem_size,
-                              pcms->above_4g_mem_size,
+                              x86ms->below_4g_mem_size,
+                              x86ms->above_4g_mem_size,
                               pci_memory, ram_memory);
         pcms->bus = pci_bus;
     } else {
@@ -212,25 +205,15 @@ static void pc_init1(MachineState *machine,
                               &error_abort);
         no_hpet = 1;
     }
-    isa_bus_irqs(isa_bus, pcms->gsi);
+    isa_bus_irqs(isa_bus, x86ms->gsi);
 
-    if (kvm_pic_in_kernel()) {
-        i8259 = kvm_i8259_init(isa_bus);
-    } else if (xen_enabled()) {
-        i8259 = xen_interrupt_controller_init();
-    } else {
-        i8259 = i8259_init(isa_bus, pc_allocate_cpu_irq());
-    }
+    pc_i8259_create(isa_bus, gsi_state->i8259_irq);
 
-    for (i = 0; i < ISA_NUM_IRQS; i++) {
-        gsi_state->i8259_irq[i] = i8259[i];
-    }
-    g_free(i8259);
     if (pcmc->pci_enabled) {
         ioapic_init_gsi(gsi_state, "i440fx");
     }
 
-    pc_register_ferr_irq(pcms->gsi[13]);
+    pc_register_ferr_irq(x86ms->gsi[13]);
 
     pc_vga_init(isa_bus, pcmc->pci_enabled ? pci_bus : NULL);
 
@@ -240,7 +223,7 @@ static void pc_init1(MachineState *machine,
     }
 
     /* init basic PC hardware */
-    pc_basic_device_init(isa_bus, pcms->gsi, &rtc_state, true,
+    pc_basic_device_init(isa_bus, x86ms->gsi, &rtc_state, true,
                          (pcms->vmport != ON_OFF_AUTO_ON), pcms->pit_enabled,
                          0x4);
 
@@ -287,7 +270,7 @@ else {
         smi_irq = qemu_allocate_irq(pc_acpi_smi_interrupt, first_cpu, 0);
         /* TODO: Populate SPD eeprom data.  */
         pcms->smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100,
-                                    pcms->gsi[9], smi_irq,
+                                    x86ms->gsi[9], smi_irq,
                                     pc_machine_is_smm_enabled(pcms),
                                     &piix4_pm);
         smbus_eeprom_init(pcms->smbus, 8, NULL, 0);
@@ -303,7 +286,7 @@ else {
 
     if (machine->nvdimms_state->is_enabled) {
         nvdimm_init_acpi_state(machine->nvdimms_state, system_io,
-                               pcms->fw_cfg, OBJECT(pcms));
+                               x86ms->fw_cfg, OBJECT(pcms));
     }
 }
 
@@ -728,7 +711,7 @@ DEFINE_I440FX_MACHINE(v1_4, "pc-i440fx-1.4", pc_compat_1_4_fn,
 
 static void pc_i440fx_1_3_machine_options(MachineClass *m)
 {
-    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
+    X86MachineClass *x86mc = X86_MACHINE_CLASS(m);
     static GlobalProperty compat[] = {
         PC_CPU_MODEL_IDS("1.3.0")
         { "usb-tablet", "usb_version", "1" },
@@ -739,7 +722,7 @@ static void pc_i440fx_1_3_machine_options(MachineClass *m)
 
     pc_i440fx_1_4_machine_options(m);
     m->hw_version = "1.3.0";
-    pcmc->compat_apic_id_mode = true;
+    x86mc->compat_apic_id_mode = true;
     compat_props_add(m->compat_props, compat, G_N_ELEMENTS(compat));
 }
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 748fc2ee15..d8b4c48021 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -36,11 +36,11 @@
 #include "hw/rtc/mc146818rtc.h"
 #include "hw/xen/xen.h"
 #include "sysemu/kvm.h"
-#include "kvm_i386.h"
 #include "hw/kvm/clock.h"
 #include "hw/pci-host/q35.h"
 #include "hw/qdev-properties.h"
 #include "exec/address-spaces.h"
+#include "hw/i386/x86.h"
 #include "hw/i386/pc.h"
 #include "hw/i386/ich9.h"
 #include "hw/i386/amd_iommu.h"
@@ -115,6 +115,7 @@ static void pc_q35_init(MachineState *machine)
 {
     PCMachineState *pcms = PC_MACHINE(machine);
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
+    X86MachineState *x86ms = X86_MACHINE(machine);
     Q35PCIHost *q35_host;
     PCIHostState *phb;
     PCIBus *host_bus;
@@ -128,7 +129,6 @@ static void pc_q35_init(MachineState *machine)
     MemoryRegion *ram_memory;
     GSIState *gsi_state;
     ISABus *isa_bus;
-    qemu_irq *i8259;
     int i;
     ICH9LPCState *ich9_lpc;
     PCIDevice *ahci;
@@ -152,34 +152,34 @@ static void pc_q35_init(MachineState *machine)
     /* Handle the machine opt max-ram-below-4g.  It is basically doing
      * min(qemu limit, user limit).
      */
-    if (!pcms->max_ram_below_4g) {
-        pcms->max_ram_below_4g = 1ULL << 32; /* default: 4G */;
+    if (!x86ms->max_ram_below_4g) {
+        x86ms->max_ram_below_4g = 4 * GiB;
     }
-    if (lowmem > pcms->max_ram_below_4g) {
-        lowmem = pcms->max_ram_below_4g;
+    if (lowmem > x86ms->max_ram_below_4g) {
+        lowmem = x86ms->max_ram_below_4g;
         if (machine->ram_size - lowmem > lowmem &&
             lowmem & (1 * GiB - 1)) {
             warn_report("There is possibly poor performance as the ram size "
                         " (0x%" PRIx64 ") is more then twice the size of"
                         " max-ram-below-4g (%"PRIu64") and"
                         " max-ram-below-4g is not a multiple of 1G.",
-                        (uint64_t)machine->ram_size, pcms->max_ram_below_4g);
+                        (uint64_t)machine->ram_size, x86ms->max_ram_below_4g);
         }
     }
 
     if (machine->ram_size >= lowmem) {
-        pcms->above_4g_mem_size = machine->ram_size - lowmem;
-        pcms->below_4g_mem_size = lowmem;
+        x86ms->above_4g_mem_size = machine->ram_size - lowmem;
+        x86ms->below_4g_mem_size = lowmem;
     } else {
-        pcms->above_4g_mem_size = 0;
-        pcms->below_4g_mem_size = machine->ram_size;
+        x86ms->above_4g_mem_size = 0;
+        x86ms->below_4g_mem_size = machine->ram_size;
     }
 
     if (xen_enabled()) {
         xen_hvm_init(pcms, &ram_memory);
     }
 
-    pc_cpus_init(pcms);
+    x86_cpus_init(x86ms, pcmc->default_cpu_version);
 
     kvmclock_create();
 
@@ -209,16 +209,6 @@ static void pc_q35_init(MachineState *machine)
                        rom_memory, &ram_memory);
     }
 
-    /* irq lines */
-    gsi_state = g_malloc0(sizeof(*gsi_state));
-    if (kvm_ioapic_in_kernel()) {
-        kvm_pc_setup_irq_routing(pcmc->pci_enabled);
-        pcms->gsi = qemu_allocate_irqs(kvm_pc_gsi_handler, gsi_state,
-                                       GSI_NUM_PINS);
-    } else {
-        pcms->gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS);
-    }
-
     /* create pci host bus */
     q35_host = Q35_HOST_DEVICE(qdev_create(NULL, TYPE_Q35_HOST_DEVICE));
 
@@ -231,9 +221,9 @@ static void pc_q35_init(MachineState *machine)
                              MCH_HOST_PROP_SYSTEM_MEM, NULL);
     object_property_set_link(OBJECT(q35_host), OBJECT(system_io),
                              MCH_HOST_PROP_IO_MEM, NULL);
-    object_property_set_int(OBJECT(q35_host), pcms->below_4g_mem_size,
+    object_property_set_int(OBJECT(q35_host), x86ms->below_4g_mem_size,
                             PCI_HOST_BELOW_4G_MEM_SIZE, NULL);
-    object_property_set_int(OBJECT(q35_host), pcms->above_4g_mem_size,
+    object_property_set_int(OBJECT(q35_host), x86ms->above_4g_mem_size,
                             PCI_HOST_ABOVE_4G_MEM_SIZE, NULL);
     /* pci */
     qdev_init_nofail(DEVICE(q35_host));
@@ -252,34 +242,26 @@ static void pc_q35_init(MachineState *machine)
     object_property_set_link(OBJECT(machine), OBJECT(lpc),
                              PC_MACHINE_ACPI_DEVICE_PROP, &error_abort);
 
+    /* irq lines */
+    gsi_state = pc_gsi_create(&x86ms->gsi, pcmc->pci_enabled);
+
     ich9_lpc = ICH9_LPC_DEVICE(lpc);
     lpc_dev = DEVICE(lpc);
     for (i = 0; i < GSI_NUM_PINS; i++) {
-        qdev_connect_gpio_out_named(lpc_dev, ICH9_GPIO_GSI, i, pcms->gsi[i]);
+        qdev_connect_gpio_out_named(lpc_dev, ICH9_GPIO_GSI, i, x86ms->gsi[i]);
     }
     pci_bus_irqs(host_bus, ich9_lpc_set_irq, ich9_lpc_map_irq, ich9_lpc,
                  ICH9_LPC_NB_PIRQS);
     pci_bus_set_route_irq_fn(host_bus, ich9_route_intx_pin_to_irq);
     isa_bus = ich9_lpc->isa_bus;
 
-    if (kvm_pic_in_kernel()) {
-        i8259 = kvm_i8259_init(isa_bus);
-    } else if (xen_enabled()) {
-        i8259 = xen_interrupt_controller_init();
-    } else {
-        i8259 = i8259_init(isa_bus, pc_allocate_cpu_irq());
-    }
-
-    for (i = 0; i < ISA_NUM_IRQS; i++) {
-        gsi_state->i8259_irq[i] = i8259[i];
-    }
-    g_free(i8259);
+    pc_i8259_create(isa_bus, gsi_state->i8259_irq);
 
     if (pcmc->pci_enabled) {
         ioapic_init_gsi(gsi_state, "q35");
     }
 
-    pc_register_ferr_irq(pcms->gsi[13]);
+    pc_register_ferr_irq(x86ms->gsi[13]);
 
     assert(pcms->vmport != ON_OFF_AUTO__MAX);
     if (pcms->vmport == ON_OFF_AUTO_AUTO) {
@@ -287,7 +269,7 @@ static void pc_q35_init(MachineState *machine)
     }
 
     /* init basic PC hardware */
-    pc_basic_device_init(isa_bus, pcms->gsi, &rtc_state, !mc->no_floppy,
+    pc_basic_device_init(isa_bus, x86ms->gsi, &rtc_state, !mc->no_floppy,
                          (pcms->vmport != ON_OFF_AUTO_ON), pcms->pit_enabled,
                          0xff0104);
 
@@ -330,7 +312,7 @@ static void pc_q35_init(MachineState *machine)
 
     if (machine->nvdimms_state->is_enabled) {
         nvdimm_init_acpi_state(machine->nvdimms_state, system_io,
-                               pcms->fw_cfg, OBJECT(pcms));
+                               x86ms->fw_cfg, OBJECT(pcms));
     }
 }
 
diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index a9983f0bfb..f5f3f466b0 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -31,6 +31,7 @@
 #include "qemu/option.h"
 #include "qemu/units.h"
 #include "hw/sysbus.h"
+#include "hw/i386/x86.h"
 #include "hw/i386/pc.h"
 #include "hw/loader.h"
 #include "hw/qdev-properties.h"
@@ -38,8 +39,6 @@
 #include "hw/block/flash.h"
 #include "sysemu/kvm.h"
 
-#define BIOS_FILENAME "bios.bin"
-
 /*
  * We don't have a theoretically justifiable exact lower bound on the base
  * address of any flash mapping. In practice, the IO-APIC MMIO range is
@@ -211,59 +210,6 @@ static void pc_system_flash_map(PCMachineState *pcms,
     }
 }
 
-static void old_pc_system_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw)
-{
-    char *filename;
-    MemoryRegion *bios, *isa_bios;
-    int bios_size, isa_bios_size;
-    int ret;
-
-    /* BIOS load */
-    if (bios_name == NULL) {
-        bios_name = BIOS_FILENAME;
-    }
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
-    if (filename) {
-        bios_size = get_image_size(filename);
-    } else {
-        bios_size = -1;
-    }
-    if (bios_size <= 0 ||
-        (bios_size % 65536) != 0) {
-        goto bios_error;
-    }
-    bios = g_malloc(sizeof(*bios));
-    memory_region_init_ram(bios, NULL, "pc.bios", bios_size, &error_fatal);
-    if (!isapc_ram_fw) {
-        memory_region_set_readonly(bios, true);
-    }
-    ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
-    if (ret != 0) {
-    bios_error:
-        fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
-        exit(1);
-    }
-    g_free(filename);
-
-    /* map the last 128KB of the BIOS in ISA space */
-    isa_bios_size = MIN(bios_size, 128 * KiB);
-    isa_bios = g_malloc(sizeof(*isa_bios));
-    memory_region_init_alias(isa_bios, NULL, "isa-bios", bios,
-                             bios_size - isa_bios_size, isa_bios_size);
-    memory_region_add_subregion_overlap(rom_memory,
-                                        0x100000 - isa_bios_size,
-                                        isa_bios,
-                                        1);
-    if (!isapc_ram_fw) {
-        memory_region_set_readonly(isa_bios, true);
-    }
-
-    /* map all the bios at the top of memory */
-    memory_region_add_subregion(rom_memory,
-                                (uint32_t)(-bios_size),
-                                bios);
-}
-
 void pc_system_firmware_init(PCMachineState *pcms,
                              MemoryRegion *rom_memory)
 {
@@ -272,7 +218,7 @@ void pc_system_firmware_init(PCMachineState *pcms,
     BlockBackend *pflash_blk[ARRAY_SIZE(pcms->flash)];
 
     if (!pcmc->pci_enabled) {
-        old_pc_system_rom_init(rom_memory, true);
+        x86_bios_rom_init(rom_memory, true);
         return;
     }
 
@@ -293,7 +239,7 @@ void pc_system_firmware_init(PCMachineState *pcms,
 
     if (!pflash_blk[0]) {
         /* Machine property pflash0 not set, use ROM mode */
-        old_pc_system_rom_init(rom_memory, false);
+        x86_bios_rom_init(rom_memory, false);
     } else {
         if (kvm_enabled() && !kvm_readonly_mem_enabled()) {
             /*
diff --git a/hw/i386/x86.c b/hw/i386/x86.c
new file mode 100644
index 0000000000..fd84b23124
--- /dev/null
+++ b/hw/i386/x86.c
@@ -0,0 +1,795 @@
+/*
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qemu/option.h"
+#include "qemu/cutils.h"
+#include "qemu/units.h"
+#include "qemu-common.h"
+#include "qapi/error.h"
+#include "qapi/qmp/qerror.h"
+#include "qapi/qapi-visit-common.h"
+#include "qapi/visitor.h"
+#include "sysemu/qtest.h"
+#include "sysemu/numa.h"
+#include "sysemu/replay.h"
+#include "sysemu/sysemu.h"
+
+#include "hw/i386/x86.h"
+#include "target/i386/cpu.h"
+#include "hw/i386/topology.h"
+#include "hw/i386/fw_cfg.h"
+
+#include "hw/acpi/cpu_hotplug.h"
+#include "hw/nmi.h"
+#include "hw/loader.h"
+#include "multiboot.h"
+#include "elf.h"
+#include "standard-headers/asm-x86/bootparam.h"
+
+#define BIOS_FILENAME "bios.bin"
+
+/* Physical Address of PVH entry point read from kernel ELF NOTE */
+static size_t pvh_start_addr;
+
+/*
+ * Calculates initial APIC ID for a specific CPU index
+ *
+ * Currently we need to be able to calculate the APIC ID from the CPU index
+ * alone (without requiring a CPU object), as the QEMU<->Seabios interfaces have
+ * no concept of "CPU index", and the NUMA tables on fw_cfg need the APIC ID of
+ * all CPUs up to max_cpus.
+ */
+uint32_t x86_cpu_apic_id_from_index(X86MachineState *x86ms,
+                                    unsigned int cpu_index)
+{
+    MachineState *ms = MACHINE(x86ms);
+    X86MachineClass *x86mc = X86_MACHINE_GET_CLASS(x86ms);
+    uint32_t correct_id;
+    static bool warned;
+
+    correct_id = x86_apicid_from_cpu_idx(x86ms->smp_dies, ms->smp.cores,
+                                         ms->smp.threads, cpu_index);
+    if (x86mc->compat_apic_id_mode) {
+        if (cpu_index != correct_id && !warned && !qtest_enabled()) {
+            error_report("APIC IDs set in compatibility mode, "
+                         "CPU topology won't match the configuration");
+            warned = true;
+        }
+        return cpu_index;
+    } else {
+        return correct_id;
+    }
+}
+
+
+void x86_cpu_new(X86MachineState *x86ms, int64_t apic_id, Error **errp)
+{
+    Object *cpu = NULL;
+    Error *local_err = NULL;
+    CPUX86State *env = NULL;
+
+    cpu = object_new(MACHINE(x86ms)->cpu_type);
+
+    env = &X86_CPU(cpu)->env;
+    env->nr_dies = x86ms->smp_dies;
+
+    object_property_set_uint(cpu, apic_id, "apic-id", &local_err);
+    object_property_set_bool(cpu, true, "realized", &local_err);
+
+    object_unref(cpu);
+    error_propagate(errp, local_err);
+}
+
+void x86_cpus_init(X86MachineState *x86ms, int default_cpu_version)
+{
+    int i;
+    const CPUArchIdList *possible_cpus;
+    MachineState *ms = MACHINE(x86ms);
+    MachineClass *mc = MACHINE_GET_CLASS(x86ms);
+
+    x86_cpu_set_default_version(default_cpu_version);
+
+    /*
+     * Calculates the limit to CPU APIC ID values
+     *
+     * Limit for the APIC ID value, so that all
+     * CPU APIC IDs are < x86ms->apic_id_limit.
+     *
+     * This is used for FW_CFG_MAX_CPUS. See comments on fw_cfg_arch_create().
+     */
+    x86ms->apic_id_limit = x86_cpu_apic_id_from_index(x86ms,
+                                                      ms->smp.max_cpus - 1) + 1;
+    possible_cpus = mc->possible_cpu_arch_ids(ms);
+    for (i = 0; i < ms->smp.cpus; i++) {
+        x86_cpu_new(x86ms, possible_cpus->cpus[i].arch_id, &error_fatal);
+    }
+}
+
+CpuInstanceProperties
+x86_cpu_index_to_props(MachineState *ms, unsigned cpu_index)
+{
+    MachineClass *mc = MACHINE_GET_CLASS(ms);
+    const CPUArchIdList *possible_cpus = mc->possible_cpu_arch_ids(ms);
+
+    assert(cpu_index < possible_cpus->len);
+    return possible_cpus->cpus[cpu_index].props;
+}
+
+int64_t x86_get_default_cpu_node_id(const MachineState *ms, int idx)
+{
+   X86CPUTopoInfo topo;
+   X86MachineState *x86ms = X86_MACHINE(ms);
+
+   assert(idx < ms->possible_cpus->len);
+   x86_topo_ids_from_apicid(ms->possible_cpus->cpus[idx].arch_id,
+                            x86ms->smp_dies, ms->smp.cores,
+                            ms->smp.threads, &topo);
+   return topo.pkg_id % ms->numa_state->num_nodes;
+}
+
+const CPUArchIdList *x86_possible_cpu_arch_ids(MachineState *ms)
+{
+    X86MachineState *x86ms = X86_MACHINE(ms);
+    int i;
+    unsigned int max_cpus = ms->smp.max_cpus;
+
+    if (ms->possible_cpus) {
+        /*
+         * make sure that max_cpus hasn't changed since the first use, i.e.
+         * -smp hasn't been parsed after it
+         */
+        assert(ms->possible_cpus->len == max_cpus);
+        return ms->possible_cpus;
+    }
+
+    ms->possible_cpus = g_malloc0(sizeof(CPUArchIdList) +
+                                  sizeof(CPUArchId) * max_cpus);
+    ms->possible_cpus->len = max_cpus;
+    for (i = 0; i < ms->possible_cpus->len; i++) {
+        X86CPUTopoInfo topo;
+
+        ms->possible_cpus->cpus[i].type = ms->cpu_type;
+        ms->possible_cpus->cpus[i].vcpus_count = 1;
+        ms->possible_cpus->cpus[i].arch_id =
+            x86_cpu_apic_id_from_index(x86ms, i);
+        x86_topo_ids_from_apicid(ms->possible_cpus->cpus[i].arch_id,
+                                 x86ms->smp_dies, ms->smp.cores,
+                                 ms->smp.threads, &topo);
+        ms->possible_cpus->cpus[i].props.has_socket_id = true;
+        ms->possible_cpus->cpus[i].props.socket_id = topo.pkg_id;
+        if (x86ms->smp_dies > 1) {
+            ms->possible_cpus->cpus[i].props.has_die_id = true;
+            ms->possible_cpus->cpus[i].props.die_id = topo.die_id;
+        }
+        ms->possible_cpus->cpus[i].props.has_core_id = true;
+        ms->possible_cpus->cpus[i].props.core_id = topo.core_id;
+        ms->possible_cpus->cpus[i].props.has_thread_id = true;
+        ms->possible_cpus->cpus[i].props.thread_id = topo.smt_id;
+    }
+    return ms->possible_cpus;
+}
+
+static void x86_nmi(NMIState *n, int cpu_index, Error **errp)
+{
+    /* cpu index isn't used */
+    CPUState *cs;
+
+    CPU_FOREACH(cs) {
+        X86CPU *cpu = X86_CPU(cs);
+
+        if (!cpu->apic_state) {
+            cpu_interrupt(cs, CPU_INTERRUPT_NMI);
+        } else {
+            apic_deliver_nmi(cpu->apic_state);
+        }
+    }
+}
+
+static long get_file_size(FILE *f)
+{
+    long where, size;
+
+    /* XXX: on Unix systems, using fstat() probably makes more sense */
+
+    where = ftell(f);
+    fseek(f, 0, SEEK_END);
+    size = ftell(f);
+    fseek(f, where, SEEK_SET);
+
+    return size;
+}
+
+struct setup_data {
+    uint64_t next;
+    uint32_t type;
+    uint32_t len;
+    uint8_t data[0];
+} __attribute__((packed));
+
+
+/*
+ * The entry point into the kernel for PVH boot is different from
+ * the native entry point.  The PVH entry is defined by the x86/HVM
+ * direct boot ABI and is available in an ELFNOTE in the kernel binary.
+ *
+ * This function is passed to load_elf() when it is called from
+ * load_elfboot() which then additionally checks for an ELF Note of
+ * type XEN_ELFNOTE_PHYS32_ENTRY and passes it to this function to
+ * parse the PVH entry address from the ELF Note.
+ *
+ * Due to trickery in elf_opts.h, load_elf() is actually available as
+ * load_elf32() or load_elf64() and this routine needs to be able
+ * to deal with being called as 32 or 64 bit.
+ *
+ * The address of the PVH entry point is saved to the 'pvh_start_addr'
+ * global variable.  (although the entry point is 32-bit, the kernel
+ * binary can be either 32-bit or 64-bit).
+ */
+static uint64_t read_pvh_start_addr(void *arg1, void *arg2, bool is64)
+{
+    size_t *elf_note_data_addr;
+
+    /* Check if ELF Note header passed in is valid */
+    if (arg1 == NULL) {
+        return 0;
+    }
+
+    if (is64) {
+        struct elf64_note *nhdr64 = (struct elf64_note *)arg1;
+        uint64_t nhdr_size64 = sizeof(struct elf64_note);
+        uint64_t phdr_align = *(uint64_t *)arg2;
+        uint64_t nhdr_namesz = nhdr64->n_namesz;
+
+        elf_note_data_addr =
+            ((void *)nhdr64) + nhdr_size64 +
+            QEMU_ALIGN_UP(nhdr_namesz, phdr_align);
+    } else {
+        struct elf32_note *nhdr32 = (struct elf32_note *)arg1;
+        uint32_t nhdr_size32 = sizeof(struct elf32_note);
+        uint32_t phdr_align = *(uint32_t *)arg2;
+        uint32_t nhdr_namesz = nhdr32->n_namesz;
+
+        elf_note_data_addr =
+            ((void *)nhdr32) + nhdr_size32 +
+            QEMU_ALIGN_UP(nhdr_namesz, phdr_align);
+    }
+
+    pvh_start_addr = *elf_note_data_addr;
+
+    return pvh_start_addr;
+}
+
+static bool load_elfboot(const char *kernel_filename,
+                         int kernel_file_size,
+                         uint8_t *header,
+                         size_t pvh_xen_start_addr,
+                         FWCfgState *fw_cfg)
+{
+    uint32_t flags = 0;
+    uint32_t mh_load_addr = 0;
+    uint32_t elf_kernel_size = 0;
+    uint64_t elf_entry;
+    uint64_t elf_low, elf_high;
+    int kernel_size;
+
+    if (ldl_p(header) != 0x464c457f) {
+        return false; /* no elfboot */
+    }
+
+    bool elf_is64 = header[EI_CLASS] == ELFCLASS64;
+    flags = elf_is64 ?
+        ((Elf64_Ehdr *)header)->e_flags : ((Elf32_Ehdr *)header)->e_flags;
+
+    if (flags & 0x00010004) { /* LOAD_ELF_HEADER_HAS_ADDR */
+        error_report("elfboot unsupported flags = %x", flags);
+        exit(1);
+    }
+
+    uint64_t elf_note_type = XEN_ELFNOTE_PHYS32_ENTRY;
+    kernel_size = load_elf(kernel_filename, read_pvh_start_addr,
+                           NULL, &elf_note_type, &elf_entry,
+                           &elf_low, &elf_high, 0, I386_ELF_MACHINE,
+                           0, 0);
+
+    if (kernel_size < 0) {
+        error_report("Error while loading elf kernel");
+        exit(1);
+    }
+    mh_load_addr = elf_low;
+    elf_kernel_size = elf_high - elf_low;
+
+    if (pvh_start_addr == 0) {
+        error_report("Error loading uncompressed kernel without PVH ELF Note");
+        exit(1);
+    }
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ENTRY, pvh_start_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, mh_load_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, elf_kernel_size);
+
+    return true;
+}
+
+void x86_load_linux(X86MachineState *x86ms,
+                    FWCfgState *fw_cfg,
+                    int acpi_data_size,
+                    bool pvh_enabled,
+                    bool linuxboot_dma_enabled)
+{
+    uint16_t protocol;
+    int setup_size, kernel_size, cmdline_size;
+    int dtb_size, setup_data_offset;
+    uint32_t initrd_max;
+    uint8_t header[8192], *setup, *kernel;
+    hwaddr real_addr, prot_addr, cmdline_addr, initrd_addr = 0;
+    FILE *f;
+    char *vmode;
+    MachineState *machine = MACHINE(x86ms);
+    struct setup_data *setup_data;
+    const char *kernel_filename = machine->kernel_filename;
+    const char *initrd_filename = machine->initrd_filename;
+    const char *dtb_filename = machine->dtb;
+    const char *kernel_cmdline = machine->kernel_cmdline;
+
+    /* Align to 16 bytes as a paranoia measure */
+    cmdline_size = (strlen(kernel_cmdline) + 16) & ~15;
+
+    /* load the kernel header */
+    f = fopen(kernel_filename, "rb");
+    if (!f) {
+        fprintf(stderr, "qemu: could not open kernel file '%s': %s\n",
+                kernel_filename, strerror(errno));
+        exit(1);
+    }
+
+    kernel_size = get_file_size(f);
+    if (!kernel_size ||
+        fread(header, 1, MIN(ARRAY_SIZE(header), kernel_size), f) !=
+        MIN(ARRAY_SIZE(header), kernel_size)) {
+        fprintf(stderr, "qemu: could not load kernel '%s': %s\n",
+                kernel_filename, strerror(errno));
+        exit(1);
+    }
+
+    /* kernel protocol version */
+    if (ldl_p(header + 0x202) == 0x53726448) {
+        protocol = lduw_p(header + 0x206);
+    } else {
+        /*
+         * This could be a multiboot kernel. If it is, let's stop treating it
+         * like a Linux kernel.
+         * Note: some multiboot images could be in the ELF format (the same of
+         * PVH), so we try multiboot first since we check the multiboot magic
+         * header before to load it.
+         */
+        if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
+                           kernel_cmdline, kernel_size, header)) {
+            return;
+        }
+        /*
+         * Check if the file is an uncompressed kernel file (ELF) and load it,
+         * saving the PVH entry point used by the x86/HVM direct boot ABI.
+         * If load_elfboot() is successful, populate the fw_cfg info.
+         */
+        if (pvh_enabled &&
+            load_elfboot(kernel_filename, kernel_size,
+                         header, pvh_start_addr, fw_cfg)) {
+            fclose(f);
+
+            fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE,
+                strlen(kernel_cmdline) + 1);
+            fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline);
+
+            fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, sizeof(header));
+            fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA,
+                             header, sizeof(header));
+
+            /* load initrd */
+            if (initrd_filename) {
+                GMappedFile *mapped_file;
+                gsize initrd_size;
+                gchar *initrd_data;
+                GError *gerr = NULL;
+
+                mapped_file = g_mapped_file_new(initrd_filename, false, &gerr);
+                if (!mapped_file) {
+                    fprintf(stderr, "qemu: error reading initrd %s: %s\n",
+                            initrd_filename, gerr->message);
+                    exit(1);
+                }
+                x86ms->initrd_mapped_file = mapped_file;
+
+                initrd_data = g_mapped_file_get_contents(mapped_file);
+                initrd_size = g_mapped_file_get_length(mapped_file);
+                initrd_max = x86ms->below_4g_mem_size - acpi_data_size - 1;
+                if (initrd_size >= initrd_max) {
+                    fprintf(stderr, "qemu: initrd is too large, cannot support."
+                            "(max: %"PRIu32", need %"PRId64")\n",
+                            initrd_max, (uint64_t)initrd_size);
+                    exit(1);
+                }
+
+                initrd_addr = (initrd_max - initrd_size) & ~4095;
+
+                fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_addr);
+                fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
+                fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data,
+                                 initrd_size);
+            }
+
+            option_rom[nb_option_roms].bootindex = 0;
+            option_rom[nb_option_roms].name = "pvh.bin";
+            nb_option_roms++;
+
+            return;
+        }
+        protocol = 0;
+    }
+
+    if (protocol < 0x200 || !(header[0x211] & 0x01)) {
+        /* Low kernel */
+        real_addr    = 0x90000;
+        cmdline_addr = 0x9a000 - cmdline_size;
+        prot_addr    = 0x10000;
+    } else if (protocol < 0x202) {
+        /* High but ancient kernel */
+        real_addr    = 0x90000;
+        cmdline_addr = 0x9a000 - cmdline_size;
+        prot_addr    = 0x100000;
+    } else {
+        /* High and recent kernel */
+        real_addr    = 0x10000;
+        cmdline_addr = 0x20000;
+        prot_addr    = 0x100000;
+    }
+
+    /* highest address for loading the initrd */
+    if (protocol >= 0x20c &&
+        lduw_p(header + 0x236) & XLF_CAN_BE_LOADED_ABOVE_4G) {
+        /*
+         * Linux has supported initrd up to 4 GB for a very long time (2007,
+         * long before XLF_CAN_BE_LOADED_ABOVE_4G which was added in 2013),
+         * though it only sets initrd_max to 2 GB to "work around bootloader
+         * bugs". Luckily, QEMU firmware(which does something like bootloader)
+         * has supported this.
+         *
+         * It's believed that if XLF_CAN_BE_LOADED_ABOVE_4G is set, initrd can
+         * be loaded into any address.
+         *
+         * In addition, initrd_max is uint32_t simply because QEMU doesn't
+         * support the 64-bit boot protocol (specifically the ext_ramdisk_image
+         * field).
+         *
+         * Therefore here just limit initrd_max to UINT32_MAX simply as well.
+         */
+        initrd_max = UINT32_MAX;
+    } else if (protocol >= 0x203) {
+        initrd_max = ldl_p(header + 0x22c);
+    } else {
+        initrd_max = 0x37ffffff;
+    }
+
+    if (initrd_max >= x86ms->below_4g_mem_size - acpi_data_size) {
+        initrd_max = x86ms->below_4g_mem_size - acpi_data_size - 1;
+    }
+
+    fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_ADDR, cmdline_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(kernel_cmdline) + 1);
+    fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline);
+
+    if (protocol >= 0x202) {
+        stl_p(header + 0x228, cmdline_addr);
+    } else {
+        stw_p(header + 0x20, 0xA33F);
+        stw_p(header + 0x22, cmdline_addr - real_addr);
+    }
+
+    /* handle vga= parameter */
+    vmode = strstr(kernel_cmdline, "vga=");
+    if (vmode) {
+        unsigned int video_mode;
+        int ret;
+        /* skip "vga=" */
+        vmode += 4;
+        if (!strncmp(vmode, "normal", 6)) {
+            video_mode = 0xffff;
+        } else if (!strncmp(vmode, "ext", 3)) {
+            video_mode = 0xfffe;
+        } else if (!strncmp(vmode, "ask", 3)) {
+            video_mode = 0xfffd;
+        } else {
+            ret = qemu_strtoui(vmode, NULL, 0, &video_mode);
+            if (ret != 0) {
+                fprintf(stderr, "qemu: can't parse 'vga' parameter: %s\n",
+                        strerror(-ret));
+                exit(1);
+            }
+        }
+        stw_p(header + 0x1fa, video_mode);
+    }
+
+    /* loader type */
+    /*
+     * High nybble = B reserved for QEMU; low nybble is revision number.
+     * If this code is substantially changed, you may want to consider
+     * incrementing the revision.
+     */
+    if (protocol >= 0x200) {
+        header[0x210] = 0xB0;
+    }
+    /* heap */
+    if (protocol >= 0x201) {
+        header[0x211] |= 0x80; /* CAN_USE_HEAP */
+        stw_p(header + 0x224, cmdline_addr - real_addr - 0x200);
+    }
+
+    /* load initrd */
+    if (initrd_filename) {
+        GMappedFile *mapped_file;
+        gsize initrd_size;
+        gchar *initrd_data;
+        GError *gerr = NULL;
+
+        if (protocol < 0x200) {
+            fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
+            exit(1);
+        }
+
+        mapped_file = g_mapped_file_new(initrd_filename, false, &gerr);
+        if (!mapped_file) {
+            fprintf(stderr, "qemu: error reading initrd %s: %s\n",
+                    initrd_filename, gerr->message);
+            exit(1);
+        }
+        x86ms->initrd_mapped_file = mapped_file;
+
+        initrd_data = g_mapped_file_get_contents(mapped_file);
+        initrd_size = g_mapped_file_get_length(mapped_file);
+        if (initrd_size >= initrd_max) {
+            fprintf(stderr, "qemu: initrd is too large, cannot support."
+                    "(max: %"PRIu32", need %"PRId64")\n",
+                    initrd_max, (uint64_t)initrd_size);
+            exit(1);
+        }
+
+        initrd_addr = (initrd_max - initrd_size) & ~4095;
+
+        fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_addr);
+        fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
+        fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data, initrd_size);
+
+        stl_p(header + 0x218, initrd_addr);
+        stl_p(header + 0x21c, initrd_size);
+    }
+
+    /* load kernel and setup */
+    setup_size = header[0x1f1];
+    if (setup_size == 0) {
+        setup_size = 4;
+    }
+    setup_size = (setup_size + 1) * 512;
+    if (setup_size > kernel_size) {
+        fprintf(stderr, "qemu: invalid kernel header\n");
+        exit(1);
+    }
+    kernel_size -= setup_size;
+
+    setup  = g_malloc(setup_size);
+    kernel = g_malloc(kernel_size);
+    fseek(f, 0, SEEK_SET);
+    if (fread(setup, 1, setup_size, f) != setup_size) {
+        fprintf(stderr, "fread() failed\n");
+        exit(1);
+    }
+    if (fread(kernel, 1, kernel_size, f) != kernel_size) {
+        fprintf(stderr, "fread() failed\n");
+        exit(1);
+    }
+    fclose(f);
+
+    /* append dtb to kernel */
+    if (dtb_filename) {
+        if (protocol < 0x209) {
+            fprintf(stderr, "qemu: Linux kernel too old to load a dtb\n");
+            exit(1);
+        }
+
+        dtb_size = get_image_size(dtb_filename);
+        if (dtb_size <= 0) {
+            fprintf(stderr, "qemu: error reading dtb %s: %s\n",
+                    dtb_filename, strerror(errno));
+            exit(1);
+        }
+
+        setup_data_offset = QEMU_ALIGN_UP(kernel_size, 16);
+        kernel_size = setup_data_offset + sizeof(struct setup_data) + dtb_size;
+        kernel = g_realloc(kernel, kernel_size);
+
+        stq_p(header + 0x250, prot_addr + setup_data_offset);
+
+        setup_data = (struct setup_data *)(kernel + setup_data_offset);
+        setup_data->next = 0;
+        setup_data->type = cpu_to_le32(SETUP_DTB);
+        setup_data->len = cpu_to_le32(dtb_size);
+
+        load_image_size(dtb_filename, setup_data->data, dtb_size);
+    }
+
+    memcpy(setup, header, MIN(sizeof(header), setup_size));
+
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
+    fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size);
+
+    fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, setup_size);
+    fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA, setup, setup_size);
+
+    option_rom[nb_option_roms].bootindex = 0;
+    option_rom[nb_option_roms].name = "linuxboot.bin";
+    if (linuxboot_dma_enabled && fw_cfg_dma_enabled(fw_cfg)) {
+        option_rom[nb_option_roms].name = "linuxboot_dma.bin";
+    }
+    nb_option_roms++;
+}
+
+void x86_bios_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw)
+{
+    char *filename;
+    MemoryRegion *bios, *isa_bios;
+    int bios_size, isa_bios_size;
+    int ret;
+
+    /* BIOS load */
+    if (bios_name == NULL) {
+        bios_name = BIOS_FILENAME;
+    }
+    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
+    if (filename) {
+        bios_size = get_image_size(filename);
+    } else {
+        bios_size = -1;
+    }
+    if (bios_size <= 0 ||
+        (bios_size % 65536) != 0) {
+        goto bios_error;
+    }
+    bios = g_malloc(sizeof(*bios));
+    memory_region_init_ram(bios, NULL, "pc.bios", bios_size, &error_fatal);
+    if (!isapc_ram_fw) {
+        memory_region_set_readonly(bios, true);
+    }
+    ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
+    if (ret != 0) {
+    bios_error:
+        fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
+        exit(1);
+    }
+    g_free(filename);
+
+    /* map the last 128KB of the BIOS in ISA space */
+    isa_bios_size = MIN(bios_size, 128 * KiB);
+    isa_bios = g_malloc(sizeof(*isa_bios));
+    memory_region_init_alias(isa_bios, NULL, "isa-bios", bios,
+                             bios_size - isa_bios_size, isa_bios_size);
+    memory_region_add_subregion_overlap(rom_memory,
+                                        0x100000 - isa_bios_size,
+                                        isa_bios,
+                                        1);
+    if (!isapc_ram_fw) {
+        memory_region_set_readonly(isa_bios, true);
+    }
+
+    /* map all the bios at the top of memory */
+    memory_region_add_subregion(rom_memory,
+                                (uint32_t)(-bios_size),
+                                bios);
+}
+
+static void x86_machine_get_max_ram_below_4g(Object *obj, Visitor *v,
+                                             const char *name, void *opaque,
+                                             Error **errp)
+{
+    X86MachineState *x86ms = X86_MACHINE(obj);
+    uint64_t value = x86ms->max_ram_below_4g;
+
+    visit_type_size(v, name, &value, errp);
+}
+
+static void x86_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
+                                             const char *name, void *opaque,
+                                             Error **errp)
+{
+    X86MachineState *x86ms = X86_MACHINE(obj);
+    Error *error = NULL;
+    uint64_t value;
+
+    visit_type_size(v, name, &value, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+    if (value > 4 * GiB) {
+        error_setg(&error,
+                   "Machine option 'max-ram-below-4g=%"PRIu64
+                   "' expects size less than or equal to 4G", value);
+        error_propagate(errp, error);
+        return;
+    }
+
+    if (value < 1 * MiB) {
+        warn_report("Only %" PRIu64 " bytes of RAM below the 4GiB boundary,"
+                    "BIOS may not work with less than 1MiB", value);
+    }
+
+    x86ms->max_ram_below_4g = value;
+}
+
+static void x86_machine_initfn(Object *obj)
+{
+    X86MachineState *x86ms = X86_MACHINE(obj);
+
+    x86ms->max_ram_below_4g = 0; /* use default */
+    x86ms->smp_dies = 1;
+}
+
+static void x86_machine_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+    X86MachineClass *x86mc = X86_MACHINE_CLASS(oc);
+    NMIClass *nc = NMI_CLASS(oc);
+
+    mc->cpu_index_to_instance_props = x86_cpu_index_to_props;
+    mc->get_default_cpu_node_id = x86_get_default_cpu_node_id;
+    mc->possible_cpu_arch_ids = x86_possible_cpu_arch_ids;
+    x86mc->compat_apic_id_mode = false;
+    nc->nmi_monitor_handler = x86_nmi;
+
+    object_class_property_add(oc, X86_MACHINE_MAX_RAM_BELOW_4G, "size",
+        x86_machine_get_max_ram_below_4g, x86_machine_set_max_ram_below_4g,
+        NULL, NULL, &error_abort);
+
+    object_class_property_set_description(oc, X86_MACHINE_MAX_RAM_BELOW_4G,
+        "Maximum ram below the 4G boundary (32bit boundary)", &error_abort);
+}
+
+static const TypeInfo x86_machine_info = {
+    .name = TYPE_X86_MACHINE,
+    .parent = TYPE_MACHINE,
+    .abstract = true,
+    .instance_size = sizeof(X86MachineState),
+    .instance_init = x86_machine_initfn,
+    .class_size = sizeof(X86MachineClass),
+    .class_init = x86_machine_class_init,
+    .interfaces = (InterfaceInfo[]) {
+         { TYPE_NMI },
+         { }
+    },
+};
+
+static void x86_machine_register_types(void)
+{
+    type_register_static(&x86_machine_info);
+}
+
+type_init(x86_machine_register_types)
diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index 6b5e5bb7f5..95f23a263c 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -197,11 +197,13 @@ qemu_irq *xen_interrupt_controller_init(void)
 static void xen_ram_init(PCMachineState *pcms,
                          ram_addr_t ram_size, MemoryRegion **ram_memory_p)
 {
+    X86MachineState *x86ms = X86_MACHINE(pcms);
     MemoryRegion *sysmem = get_system_memory();
     ram_addr_t block_len;
-    uint64_t user_lowmem = object_property_get_uint(qdev_get_machine(),
-                                                    PC_MACHINE_MAX_RAM_BELOW_4G,
-                                                    &error_abort);
+    uint64_t user_lowmem =
+        object_property_get_uint(qdev_get_machine(),
+                                 X86_MACHINE_MAX_RAM_BELOW_4G,
+                                 &error_abort);
 
     /* Handle the machine opt max-ram-below-4g.  It is basically doing
      * min(xen limit, user limit).
@@ -214,20 +216,20 @@ static void xen_ram_init(PCMachineState *pcms,
     }
 
     if (ram_size >= user_lowmem) {
-        pcms->above_4g_mem_size = ram_size - user_lowmem;
-        pcms->below_4g_mem_size = user_lowmem;
+        x86ms->above_4g_mem_size = ram_size - user_lowmem;
+        x86ms->below_4g_mem_size = user_lowmem;
     } else {
-        pcms->above_4g_mem_size = 0;
-        pcms->below_4g_mem_size = ram_size;
+        x86ms->above_4g_mem_size = 0;
+        x86ms->below_4g_mem_size = ram_size;
     }
-    if (!pcms->above_4g_mem_size) {
+    if (!x86ms->above_4g_mem_size) {
         block_len = ram_size;
     } else {
         /*
          * Xen does not allocate the memory continuously, it keeps a
          * hole of the size computed above or passed in.
          */
-        block_len = (1ULL << 32) + pcms->above_4g_mem_size;
+        block_len = (1ULL << 32) + x86ms->above_4g_mem_size;
     }
     memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len,
                            &error_fatal);
@@ -244,12 +246,12 @@ static void xen_ram_init(PCMachineState *pcms,
      */
     memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo",
                              &ram_memory, 0xc0000,
-                             pcms->below_4g_mem_size - 0xc0000);
+                             x86ms->below_4g_mem_size - 0xc0000);
     memory_region_add_subregion(sysmem, 0xc0000, &ram_lo);
-    if (pcms->above_4g_mem_size > 0) {
+    if (x86ms->above_4g_mem_size > 0) {
         memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi",
                                  &ram_memory, 0x100000000ULL,
-                                 pcms->above_4g_mem_size);
+                                 x86ms->above_4g_mem_size);
         memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi);
     }
 }
@@ -265,7 +267,7 @@ void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr,
         /* RAM already populated in Xen */
         fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT
                 " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n",
-                __func__, size, ram_addr); 
+                __func__, size, ram_addr);
         return;
     }