Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20180215-1' into staging

target-arm queue:
 * aspeed: code cleanup to use unimplemented_device
 * preparatory work for 'raspi3' RaspberryPi 3 machine model
 * more SVE prep work
 * v8M: add minor missing registers
 * v7M: fix bug where we weren't migrating v7m.other_sp
 * v7M: fix bugs in handling of interrupt registers for
   external interrupts beyond 32

# gpg: Signature made Thu 15 Feb 2018 18:34:40 GMT
# gpg:                using RSA key 3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20180215-1:
  raspi: Raspberry Pi 3 support
  bcm2836: Make CPU type configurable
  target/arm: Implement v8M MSPLIM and PSPLIM registers
  target/arm: Migrate v7m.other_sp
  target/arm: Add AIRCR to vmstate struct
  hw/intc/armv7m_nvic: Fix byte-to-interrupt number conversions
  target/arm: Implement writing to CONTROL_NS for v8M
  hw/intc/armv7m_nvic: Implement SCR
  hw/intc/armv7m_nvic: Implement cache ID registers
  hw/intc/armv7m_nvic: Implement v8M CPPWR register
  hw/intc/armv7m_nvic: Implement M profile cache maintenance ops
  hw/intc/armv7m_nvic: Fix ICSR PENDNMISET/CLR handling
  hw/intc/armv7m_nvic: Don't hardcode M profile ID registers in NVIC
  target/arm: Handle SVE registers when using clear_vec_high
  target/arm: Enforce access to ZCR_EL at translation
  target/arm: Suppress TB end for FPCR/FPSR
  target/arm: Enforce FP access to FPCR/FPSR
  target/arm: Remove ARM_CP_64BIT from ZCR_EL registers
  hw/arm/aspeed: simplify using the 'unimplemented device' for aspeed_soc.io
  hw/arm/aspeed: directly map the serial device to the system address space

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 111 insertions, 73 deletions

diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index c83b7e207b..30d25f8b06 100644
--- a/hw/arm/aspeed_soc.c
+++ b/hw/arm/aspeed_soc.c
@@ -15,6 +15,7 @@
 #include "qemu-common.h"
 #include "cpu.h"
 #include "exec/address-spaces.h"
+#include "hw/misc/unimp.h"
 #include "hw/arm/aspeed_soc.h"
 #include "hw/char/serial.h"
 #include "qemu/log.h"
@@ -99,31 +100,6 @@ static const AspeedSoCInfo aspeed_socs[] = {
     },
 };
 
-/*
- * IO handlers: simply catch any reads/writes to IO addresses that aren't
- * handled by a device mapping.
- */
-
-static uint64_t aspeed_soc_io_read(void *p, hwaddr offset, unsigned size)
-{
-    qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " [%u]\n",
-                  __func__, offset, size);
-    return 0;
-}
-
-static void aspeed_soc_io_write(void *opaque, hwaddr offset, uint64_t value,
-                unsigned size)
-{
-    qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " <- 0x%" PRIx64 " [%u]\n",
-                  __func__, offset, value, size);
-}
-
-static const MemoryRegionOps aspeed_soc_io_ops = {
-    .read = aspeed_soc_io_read,
-    .write = aspeed_soc_io_write,
-    .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
 static void aspeed_soc_init(Object *obj)
 {
     AspeedSoCState *s = ASPEED_SOC(obj);
@@ -199,10 +175,8 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     Error *err = NULL, *local_err = NULL;
 
     /* IO space */
-    memory_region_init_io(&s->iomem, NULL, &aspeed_soc_io_ops, NULL,
-            "aspeed_soc.io", ASPEED_SOC_IOMEM_SIZE);
-    memory_region_add_subregion_overlap(get_system_memory(),
-                                        ASPEED_SOC_IOMEM_BASE, &s->iomem, -1);
+    create_unimplemented_device("aspeed_soc.io",
+                                ASPEED_SOC_IOMEM_BASE, ASPEED_SOC_IOMEM_SIZE);
 
     /* CPU */
     object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
@@ -257,7 +231,8 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     /* UART - attach an 8250 to the IO space as our UART5 */
     if (serial_hds[0]) {
         qemu_irq uart5 = qdev_get_gpio_in(DEVICE(&s->vic), uart_irqs[4]);
-        serial_mm_init(&s->iomem, ASPEED_SOC_UART_5_BASE, 2,
+        serial_mm_init(get_system_memory(),
+                       ASPEED_SOC_IOMEM_BASE + ASPEED_SOC_UART_5_BASE, 2,
                        uart5, 38400, serial_hds[0], DEVICE_LITTLE_ENDIAN);
     }
 
diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index 8c43291112..40e8b25a46 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -26,14 +26,6 @@
 static void bcm2836_init(Object *obj)
 {
     BCM2836State *s = BCM2836(obj);
-    int n;
-
-    for (n = 0; n < BCM2836_NCPUS; n++) {
-        object_initialize(&s->cpus[n], sizeof(s->cpus[n]),
-                          "cortex-a15-" TYPE_ARM_CPU);
-        object_property_add_child(obj, "cpu[*]", OBJECT(&s->cpus[n]),
-                                  &error_abort);
-    }
 
     object_initialize(&s->control, sizeof(s->control), TYPE_BCM2836_CONTROL);
     object_property_add_child(obj, "control", OBJECT(&s->control), NULL);
@@ -59,6 +51,14 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
 
     /* common peripherals from bcm2835 */
 
+    obj = OBJECT(dev);
+    for (n = 0; n < BCM2836_NCPUS; n++) {
+        object_initialize(&s->cpus[n], sizeof(s->cpus[n]),
+                          s->cpu_type);
+        object_property_add_child(obj, "cpu[*]", OBJECT(&s->cpus[n]),
+                                  &error_abort);
+    }
+
     obj = object_property_get_link(OBJECT(dev), "ram", &err);
     if (obj == NULL) {
         error_setg(errp, "%s: required ram link not found: %s",
@@ -150,6 +150,7 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
 }
 
 static Property bcm2836_props[] = {
+    DEFINE_PROP_STRING("cpu-type", BCM2836State, cpu_type),
     DEFINE_PROP_UINT32("enabled-cpus", BCM2836State, enabled_cpus, BCM2836_NCPUS),
     DEFINE_PROP_END_OF_LIST()
 };
diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index cd5fa8c3dc..93121c56bf 100644
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -5,6 +5,9 @@
  * Rasperry Pi 2 emulation Copyright (c) 2015, Microsoft
  * Written by Andrew Baumann
  *
+ * Raspberry Pi 3 emulation Copyright (c) 2018 Zoltán Baldaszti
+ * Upstream code cleanup (c) 2018 Pekka Enberg
+ *
  * This code is licensed under the GNU GPLv2 and later.
  */
 
@@ -22,10 +25,11 @@
 #define SMPBOOT_ADDR    0x300 /* this should leave enough space for ATAGS */
 #define MVBAR_ADDR      0x400 /* secure vectors */
 #define BOARDSETUP_ADDR (MVBAR_ADDR + 0x20) /* board setup code */
-#define FIRMWARE_ADDR   0x8000 /* Pi loads kernel.img here by default */
+#define FIRMWARE_ADDR_2 0x8000 /* Pi 2 loads kernel.img here by default */
+#define FIRMWARE_ADDR_3 0x80000 /* Pi 3 loads kernel.img here by default */
 
 /* Table of Linux board IDs for different Pi versions */
-static const int raspi_boardid[] = {[1] = 0xc42, [2] = 0xc43};
+static const int raspi_boardid[] = {[1] = 0xc42, [2] = 0xc43, [3] = 0xc44};
 
 typedef struct RasPiState {
     BCM2836State soc;
@@ -83,8 +87,8 @@ static void setup_boot(MachineState *machine, int version, size_t ram_size)
     binfo.secure_board_setup = true;
     binfo.secure_boot = true;
 
-    /* Pi2 requires SMP setup */
-    if (version == 2) {
+    /* Pi2 and Pi3 requires SMP setup */
+    if (version >= 2) {
         binfo.smp_loader_start = SMPBOOT_ADDR;
         binfo.write_secondary_boot = write_smpboot;
         binfo.secondary_cpu_reset_hook = reset_secondary;
@@ -94,15 +98,16 @@ static void setup_boot(MachineState *machine, int version, size_t ram_size)
      * the normal Linux boot process
      */
     if (machine->firmware) {
+        hwaddr firmware_addr = version == 3 ? FIRMWARE_ADDR_3 : FIRMWARE_ADDR_2;
         /* load the firmware image (typically kernel.img) */
-        r = load_image_targphys(machine->firmware, FIRMWARE_ADDR,
-                                ram_size - FIRMWARE_ADDR);
+        r = load_image_targphys(machine->firmware, firmware_addr,
+                                ram_size - firmware_addr);
         if (r < 0) {
             error_report("Failed to load firmware from %s", machine->firmware);
             exit(1);
         }
 
-        binfo.entry = FIRMWARE_ADDR;
+        binfo.entry = firmware_addr;
         binfo.firmware_loaded = true;
     } else {
         binfo.kernel_filename = machine->kernel_filename;
@@ -113,7 +118,7 @@ static void setup_boot(MachineState *machine, int version, size_t ram_size)
     arm_load_kernel(ARM_CPU(first_cpu), &binfo);
 }
 
-static void raspi2_init(MachineState *machine)
+static void raspi_init(MachineState *machine, int version)
 {
     RasPiState *s = g_new0(RasPiState, 1);
     uint32_t vcram_size;
@@ -135,9 +140,12 @@ static void raspi2_init(MachineState *machine)
     /* Setup the SOC */
     object_property_add_const_link(OBJECT(&s->soc), "ram", OBJECT(&s->ram),
                                    &error_abort);
+    object_property_set_str(OBJECT(&s->soc), machine->cpu_type, "cpu-type",
+                            &error_abort);
     object_property_set_int(OBJECT(&s->soc), smp_cpus, "enabled-cpus",
                             &error_abort);
-    object_property_set_int(OBJECT(&s->soc), 0xa21041, "board-rev",
+    int board_rev = version == 3 ? 0xa02082 : 0xa21041;
+    object_property_set_int(OBJECT(&s->soc), board_rev, "board-rev",
                             &error_abort);
     object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_abort);
 
@@ -155,7 +163,12 @@ static void raspi2_init(MachineState *machine)
 
     vcram_size = object_property_get_uint(OBJECT(&s->soc), "vcram-size",
                                           &error_abort);
-    setup_boot(machine, 2, machine->ram_size - vcram_size);
+    setup_boot(machine, version, machine->ram_size - vcram_size);
+}
+
+static void raspi2_init(MachineState *machine)
+{
+    raspi_init(machine, 2);
 }
 
 static void raspi2_machine_init(MachineClass *mc)
@@ -166,6 +179,7 @@ static void raspi2_machine_init(MachineClass *mc)
     mc->no_parallel = 1;
     mc->no_floppy = 1;
     mc->no_cdrom = 1;
+    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a15");
     mc->max_cpus = BCM2836_NCPUS;
     mc->min_cpus = BCM2836_NCPUS;
     mc->default_cpus = BCM2836_NCPUS;
diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
index 360889d30b..c51151fa8a 100644
--- a/hw/intc/armv7m_nvic.c
+++ b/hw/intc/armv7m_nvic.c
@@ -776,6 +776,14 @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
     switch (offset) {
     case 4: /* Interrupt Control Type.  */
         return ((s->num_irq - NVIC_FIRST_IRQ) / 32) - 1;
+    case 0xc: /* CPPWR */
+        if (!arm_feature(&cpu->env, ARM_FEATURE_V8)) {
+            goto bad_offset;
+        }
+        /* We make the IMPDEF choice that nothing can ever go into a
+         * non-retentive power state, which allows us to RAZ/WI this.
+         */
+        return 0;
     case 0x380 ... 0x3bf: /* NVIC_ITNS<n> */
     {
         int startvec = 8 * (offset - 0x380) + NVIC_FIRST_IRQ;
@@ -830,8 +838,8 @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
             }
         }
         /* NMIPENDSET */
-        if ((cpu->env.v7m.aircr & R_V7M_AIRCR_BFHFNMINS_MASK) &&
-            s->vectors[ARMV7M_EXCP_NMI].pending) {
+        if ((attrs.secure || (cpu->env.v7m.aircr & R_V7M_AIRCR_BFHFNMINS_MASK))
+            && s->vectors[ARMV7M_EXCP_NMI].pending) {
             val |= (1 << 31);
         }
         /* ISRPREEMPT: RES0 when halting debug not implemented */
@@ -855,8 +863,7 @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
         }
         return val;
     case 0xd10: /* System Control.  */
-        /* TODO: Implement SLEEPONEXIT.  */
-        return 0;
+        return cpu->env.v7m.scr[attrs.secure];
     case 0xd14: /* Configuration Control.  */
         /* The BFHFNMIGN bit is the only non-banked bit; we
          * keep it in the non-secure copy of the register.
@@ -990,31 +997,44 @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs)
                       "Aux Fault status registers unimplemented\n");
         return 0;
     case 0xd40: /* PFR0.  */
-        return 0x00000030;
-    case 0xd44: /* PRF1.  */
-        return 0x00000200;
+        return cpu->id_pfr0;
+    case 0xd44: /* PFR1.  */
+        return cpu->id_pfr1;
     case 0xd48: /* DFR0.  */
-        return 0x00100000;
+        return cpu->id_dfr0;
     case 0xd4c: /* AFR0.  */
-        return 0x00000000;
+        return cpu->id_afr0;
     case 0xd50: /* MMFR0.  */
-        return 0x00000030;
+        return cpu->id_mmfr0;
     case 0xd54: /* MMFR1.  */
-        return 0x00000000;
+        return cpu->id_mmfr1;
     case 0xd58: /* MMFR2.  */
-        return 0x00000000;
+        return cpu->id_mmfr2;
     case 0xd5c: /* MMFR3.  */
-        return 0x00000000;
+        return cpu->id_mmfr3;
     case 0xd60: /* ISAR0.  */
-        return 0x01141110;
+        return cpu->id_isar0;
     case 0xd64: /* ISAR1.  */
-        return 0x02111000;
+        return cpu->id_isar1;
     case 0xd68: /* ISAR2.  */
-        return 0x21112231;
+        return cpu->id_isar2;
     case 0xd6c: /* ISAR3.  */
-        return 0x01111110;
+        return cpu->id_isar3;
     case 0xd70: /* ISAR4.  */
-        return 0x01310102;
+        return cpu->id_isar4;
+    case 0xd74: /* ISAR5.  */
+        return cpu->id_isar5;
+    case 0xd78: /* CLIDR */
+        return cpu->clidr;
+    case 0xd7c: /* CTR */
+        return cpu->ctr;
+    case 0xd80: /* CSSIDR */
+    {
+        int idx = cpu->env.v7m.csselr[attrs.secure] & R_V7M_CSSELR_INDEX_MASK;
+        return cpu->ccsidr[idx];
+    }
+    case 0xd84: /* CSSELR */
+        return cpu->env.v7m.csselr[attrs.secure];
     /* TODO: Implement debug registers.  */
     case 0xd90: /* MPU_TYPE */
         /* Unified MPU; if the MPU is not present this value is zero */
@@ -1173,6 +1193,12 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value,
     ARMCPU *cpu = s->cpu;
 
     switch (offset) {
+    case 0xc: /* CPPWR */
+        if (!arm_feature(&cpu->env, ARM_FEATURE_V8)) {
+            goto bad_offset;
+        }
+        /* Make the IMPDEF choice to RAZ/WI this. */
+        break;
     case 0x380 ... 0x3bf: /* NVIC_ITNS<n> */
     {
         int startvec = 8 * (offset - 0x380) + NVIC_FIRST_IRQ;
@@ -1191,7 +1217,7 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value,
         break;
     }
     case 0xd04: /* Interrupt Control State (ICSR) */
-        if (cpu->env.v7m.aircr & R_V7M_AIRCR_BFHFNMINS_MASK) {
+        if (attrs.secure || cpu->env.v7m.aircr & R_V7M_AIRCR_BFHFNMINS_MASK) {
             if (value & (1 << 31)) {
                 armv7m_nvic_set_pending(s, ARMV7M_EXCP_NMI, false);
             } else if (value & (1 << 30) &&
@@ -1258,8 +1284,13 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value,
         }
         break;
     case 0xd10: /* System Control.  */
-        /* TODO: Implement control registers.  */
-        qemu_log_mask(LOG_UNIMP, "NVIC: SCR unimplemented\n");
+        /* We don't implement deep-sleep so these bits are RAZ/WI.
+         * The other bits in the register are banked.
+         * QEMU's implementation ignores SEVONPEND and SLEEPONEXIT, which
+         * is architecturally permitted.
+         */
+        value &= ~(R_V7M_SCR_SLEEPDEEP_MASK | R_V7M_SCR_SLEEPDEEPS_MASK);
+        cpu->env.v7m.scr[attrs.secure] = value;
         break;
     case 0xd14: /* Configuration Control.  */
         /* Enforce RAZ/WI on reserved and must-RAZ/WI bits */
@@ -1369,6 +1400,11 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value,
         qemu_log_mask(LOG_UNIMP,
                       "NVIC: Aux fault status registers unimplemented\n");
         break;
+    case 0xd84: /* CSSELR */
+        if (!arm_v7m_csselr_razwi(cpu)) {
+            cpu->env.v7m.csselr[attrs.secure] = value & R_V7M_CSSELR_INDEX_MASK;
+        }
+        break;
     case 0xd90: /* MPU_TYPE */
         return; /* RO */
     case 0xd94: /* MPU_CTRL */
@@ -1592,6 +1628,18 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value,
         }
         break;
     }
+    case 0xf50: /* ICIALLU */
+    case 0xf58: /* ICIMVAU */
+    case 0xf5c: /* DCIMVAC */
+    case 0xf60: /* DCISW */
+    case 0xf64: /* DCCMVAU */
+    case 0xf68: /* DCCMVAC */
+    case 0xf6c: /* DCCSW */
+    case 0xf70: /* DCCIMVAC */
+    case 0xf74: /* DCCISW */
+    case 0xf78: /* BPIALL */
+        /* Cache and branch predictor maintenance: for QEMU these always NOP */
+        break;
     default:
     bad_offset:
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -1676,7 +1724,7 @@ static MemTxResult nvic_sysreg_read(void *opaque, hwaddr addr,
         /* fall through */
     case 0x180 ... 0x1bf: /* NVIC Clear enable */
         val = 0;
-        startvec = offset - 0x180 + NVIC_FIRST_IRQ; /* vector # */
+        startvec = 8 * (offset - 0x180) + NVIC_FIRST_IRQ; /* vector # */
 
         for (i = 0, end = size * 8; i < end && startvec + i < s->num_irq; i++) {
             if (s->vectors[startvec + i].enabled &&
@@ -1690,7 +1738,7 @@ static MemTxResult nvic_sysreg_read(void *opaque, hwaddr addr,
         /* fall through */
     case 0x280 ... 0x2bf: /* NVIC Clear pend */
         val = 0;
-        startvec = offset - 0x280 + NVIC_FIRST_IRQ; /* vector # */
+        startvec = 8 * (offset - 0x280) + NVIC_FIRST_IRQ; /* vector # */
         for (i = 0, end = size * 8; i < end && startvec + i < s->num_irq; i++) {
             if (s->vectors[startvec + i].pending &&
                 (attrs.secure || s->itns[startvec + i])) {
@@ -1700,7 +1748,7 @@ static MemTxResult nvic_sysreg_read(void *opaque, hwaddr addr,
         break;
     case 0x300 ... 0x33f: /* NVIC Active */
         val = 0;
-        startvec = offset - 0x300 + NVIC_FIRST_IRQ; /* vector # */
+        startvec = 8 * (offset - 0x300) + NVIC_FIRST_IRQ; /* vector # */
 
         for (i = 0, end = size * 8; i < end && startvec + i < s->num_irq; i++) {
             if (s->vectors[startvec + i].active &&
@@ -1815,7 +1863,7 @@ static MemTxResult nvic_sysreg_write(void *opaque, hwaddr addr,
     case 0x300 ... 0x33f: /* NVIC Active */
         return MEMTX_OK; /* R/O */
     case 0x400 ... 0x5ef: /* NVIC Priority */
-        startvec = 8 * (offset - 0x400) + NVIC_FIRST_IRQ; /* vector # */
+        startvec = (offset - 0x400) + NVIC_FIRST_IRQ; /* vector # */
 
         for (i = 0; i < size && startvec + i < s->num_irq; i++) {
             if (attrs.secure || s->itns[startvec + i]) {