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-rw-r--r--hw/i386/kvm/apic.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/hw/i386/kvm/apic.c b/hw/i386/kvm/apic.c
new file mode 100644
index 0000000000..c6ff9821e3
--- /dev/null
+++ b/hw/i386/kvm/apic.c
@@ -0,0 +1,209 @@
+/*
+ * KVM in-kernel APIC support
+ *
+ * Copyright (c) 2011 Siemens AG
+ *
+ * Authors:
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * See the COPYING file in the top-level directory.
+ */
+#include "hw/i386/apic_internal.h"
+#include "hw/pci/msi.h"
+#include "sysemu/kvm.h"
+
+static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic,
+ int reg_id, uint32_t val)
+{
+ *((uint32_t *)(kapic->regs + (reg_id << 4))) = val;
+}
+
+static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic,
+ int reg_id)
+{
+ return *((uint32_t *)(kapic->regs + (reg_id << 4)));
+}
+
+void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)
+{
+ APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
+ int i;
+
+ memset(kapic, 0, sizeof(*kapic));
+ kvm_apic_set_reg(kapic, 0x2, s->id << 24);
+ kvm_apic_set_reg(kapic, 0x8, s->tpr);
+ kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24);
+ kvm_apic_set_reg(kapic, 0xe, s->dest_mode << 28 | 0x0fffffff);
+ kvm_apic_set_reg(kapic, 0xf, s->spurious_vec);
+ for (i = 0; i < 8; i++) {
+ kvm_apic_set_reg(kapic, 0x10 + i, s->isr[i]);
+ kvm_apic_set_reg(kapic, 0x18 + i, s->tmr[i]);
+ kvm_apic_set_reg(kapic, 0x20 + i, s->irr[i]);
+ }
+ kvm_apic_set_reg(kapic, 0x28, s->esr);
+ kvm_apic_set_reg(kapic, 0x30, s->icr[0]);
+ kvm_apic_set_reg(kapic, 0x31, s->icr[1]);
+ for (i = 0; i < APIC_LVT_NB; i++) {
+ kvm_apic_set_reg(kapic, 0x32 + i, s->lvt[i]);
+ }
+ kvm_apic_set_reg(kapic, 0x38, s->initial_count);
+ kvm_apic_set_reg(kapic, 0x3e, s->divide_conf);
+}
+
+void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)
+{
+ APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
+ int i, v;
+
+ s->id = kvm_apic_get_reg(kapic, 0x2) >> 24;
+ s->tpr = kvm_apic_get_reg(kapic, 0x8);
+ s->arb_id = kvm_apic_get_reg(kapic, 0x9);
+ s->log_dest = kvm_apic_get_reg(kapic, 0xd) >> 24;
+ s->dest_mode = kvm_apic_get_reg(kapic, 0xe) >> 28;
+ s->spurious_vec = kvm_apic_get_reg(kapic, 0xf);
+ for (i = 0; i < 8; i++) {
+ s->isr[i] = kvm_apic_get_reg(kapic, 0x10 + i);
+ s->tmr[i] = kvm_apic_get_reg(kapic, 0x18 + i);
+ s->irr[i] = kvm_apic_get_reg(kapic, 0x20 + i);
+ }
+ s->esr = kvm_apic_get_reg(kapic, 0x28);
+ s->icr[0] = kvm_apic_get_reg(kapic, 0x30);
+ s->icr[1] = kvm_apic_get_reg(kapic, 0x31);
+ for (i = 0; i < APIC_LVT_NB; i++) {
+ s->lvt[i] = kvm_apic_get_reg(kapic, 0x32 + i);
+ }
+ s->initial_count = kvm_apic_get_reg(kapic, 0x38);
+ s->divide_conf = kvm_apic_get_reg(kapic, 0x3e);
+
+ v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4);
+ s->count_shift = (v + 1) & 7;
+
+ s->initial_count_load_time = qemu_get_clock_ns(vm_clock);
+ apic_next_timer(s, s->initial_count_load_time);
+}
+
+static void kvm_apic_set_base(APICCommonState *s, uint64_t val)
+{
+ s->apicbase = val;
+}
+
+static void kvm_apic_set_tpr(APICCommonState *s, uint8_t val)
+{
+ s->tpr = (val & 0x0f) << 4;
+}
+
+static uint8_t kvm_apic_get_tpr(APICCommonState *s)
+{
+ return s->tpr >> 4;
+}
+
+static void kvm_apic_enable_tpr_reporting(APICCommonState *s, bool enable)
+{
+ struct kvm_tpr_access_ctl ctl = {
+ .enabled = enable
+ };
+
+ kvm_vcpu_ioctl(CPU(s->cpu), KVM_TPR_ACCESS_REPORTING, &ctl);
+}
+
+static void kvm_apic_vapic_base_update(APICCommonState *s)
+{
+ struct kvm_vapic_addr vapid_addr = {
+ .vapic_addr = s->vapic_paddr,
+ };
+ int ret;
+
+ ret = kvm_vcpu_ioctl(CPU(s->cpu), KVM_SET_VAPIC_ADDR, &vapid_addr);
+ if (ret < 0) {
+ fprintf(stderr, "KVM: setting VAPIC address failed (%s)\n",
+ strerror(-ret));
+ abort();
+ }
+}
+
+static void do_inject_external_nmi(void *data)
+{
+ APICCommonState *s = data;
+ CPUState *cpu = CPU(s->cpu);
+ uint32_t lvt;
+ int ret;
+
+ cpu_synchronize_state(&s->cpu->env);
+
+ lvt = s->lvt[APIC_LVT_LINT1];
+ if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) {
+ ret = kvm_vcpu_ioctl(cpu, KVM_NMI);
+ if (ret < 0) {
+ fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",
+ strerror(-ret));
+ }
+ }
+}
+
+static void kvm_apic_external_nmi(APICCommonState *s)
+{
+ run_on_cpu(CPU(s->cpu), do_inject_external_nmi, s);
+}
+
+static uint64_t kvm_apic_mem_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ return ~(uint64_t)0;
+}
+
+static void kvm_apic_mem_write(void *opaque, hwaddr addr,
+ uint64_t data, unsigned size)
+{
+ MSIMessage msg = { .address = addr, .data = data };
+ int ret;
+
+ ret = kvm_irqchip_send_msi(kvm_state, msg);
+ if (ret < 0) {
+ fprintf(stderr, "KVM: injection failed, MSI lost (%s)\n",
+ strerror(-ret));
+ }
+}
+
+static const MemoryRegionOps kvm_apic_io_ops = {
+ .read = kvm_apic_mem_read,
+ .write = kvm_apic_mem_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void kvm_apic_init(APICCommonState *s)
+{
+ memory_region_init_io(&s->io_memory, &kvm_apic_io_ops, s, "kvm-apic-msi",
+ MSI_SPACE_SIZE);
+
+ if (kvm_has_gsi_routing()) {
+ msi_supported = true;
+ }
+}
+
+static void kvm_apic_class_init(ObjectClass *klass, void *data)
+{
+ APICCommonClass *k = APIC_COMMON_CLASS(klass);
+
+ k->init = kvm_apic_init;
+ k->set_base = kvm_apic_set_base;
+ k->set_tpr = kvm_apic_set_tpr;
+ k->get_tpr = kvm_apic_get_tpr;
+ k->enable_tpr_reporting = kvm_apic_enable_tpr_reporting;
+ k->vapic_base_update = kvm_apic_vapic_base_update;
+ k->external_nmi = kvm_apic_external_nmi;
+}
+
+static const TypeInfo kvm_apic_info = {
+ .name = "kvm-apic",
+ .parent = TYPE_APIC_COMMON,
+ .instance_size = sizeof(APICCommonState),
+ .class_init = kvm_apic_class_init,
+};
+
+static void kvm_apic_register_types(void)
+{
+ type_register_static(&kvm_apic_info);
+}
+
+type_init(kvm_apic_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-18 20:12:50 +0000