diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index d9ef69121cb6b2dcaa0042e683e6524e9db557e0..f2819eec7da3ed3d6d97afbb1a6cacb67462ee1f 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -773,17 +773,30 @@ int cpu_exec(CPUState *cpu)
/* prepare setjmp context for exception handling */
if (sigsetjmp(cpu->jmp_env, 0) != 0) {
#if defined(__clang__)
- /* Some compilers wrongly smash all local variables after
- * siglongjmp. There were bug reports for gcc 4.5.0 and clang.
+ /*
+ * Some compilers wrongly smash all local variables after
+ * siglongjmp (the spec requires that only non-volatile locals
+ * which are changed between the sigsetjmp and siglongjmp are
+ * permitted to be trashed). There were bug reports for gcc
+ * 4.5.0 and clang. The bug is fixed in all versions of gcc
+ * that we support, but is still unfixed in clang:
+ * https://bugs.llvm.org/show_bug.cgi?id=21183
+ *
* Reload essential local variables here for those compilers.
- * Newer versions of gcc would complain about this code (-Wclobbered). */
+ * Newer versions of gcc would complain about this code (-Wclobbered),
+ * so we only perform the workaround for clang.
+ */
cpu = current_cpu;
cc = CPU_GET_CLASS(cpu);
-#else /* buggy compiler */
- /* Assert that the compiler does not smash local variables. */
+#else
+ /*
+ * Non-buggy compilers preserve these locals; assert that
+ * they have the correct value.
+ */
g_assert(cpu == current_cpu);
g_assert(cc == CPU_GET_CLASS(cpu));
-#endif /* buggy compiler */
+#endif
+
#ifndef CONFIG_SOFTMMU
tcg_debug_assert(!have_mmap_lock());
#endif
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 12e4a16d3765b38f0a1f242f721aad1c17c632df..bf31ca351feb6bdda188164bec44fe11908d014f 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -216,7 +216,7 @@ static void aspeed_soc_ast2600_init(Object *obj)
/*
* ASPEED ast2600 has 0xf as cluster ID
*
- * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0388e/CIHEBGFG.html
+ * https://developer.arm.com/documentation/ddi0388/e/the-system-control-coprocessors/summary-of-system-control-coprocessor-registers/multiprocessor-affinity-register
*/
static uint64_t aspeed_calc_affinity(int cpu)
{
diff --git a/hw/arm/musca.c b/hw/arm/musca.c
index 945643c3cd7357618321bcbd358aeb05cdafe16a..7a83f7dda7dc38d40cd070a63c5df9f7ebdd093a 100644
--- a/hw/arm/musca.c
+++ b/hw/arm/musca.c
@@ -15,8 +15,8 @@
* https://developer.arm.com/products/system-design/development-boards/iot-test-chips-and-boards/musca-a-test-chip-board
* https://developer.arm.com/products/system-design/development-boards/iot-test-chips-and-boards/musca-b-test-chip-board
* We model the A and B1 variants of this board, as described in the TRMs:
- * http://infocenter.arm.com/help/topic/com.arm.doc.101107_0000_00_en/index.html
- * http://infocenter.arm.com/help/topic/com.arm.doc.101312_0000_00_en/index.html
+ * https://developer.arm.com/documentation/101107/latest/
+ * https://developer.arm.com/documentation/101312/latest/
*/
#include "qemu/osdep.h"
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index 72040d40799d1b7084a3074b3a691bd905ea767a..d1fe9bd1df62951e43d6ce3a9286e3e7e2e4e402 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -576,14 +576,6 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
create_unimplemented_device("npcm7xx.pcierc", 0xe1000000, 64 * KiB);
create_unimplemented_device("npcm7xx.kcs", 0xf0007000, 4 * KiB);
create_unimplemented_device("npcm7xx.gfxi", 0xf000e000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[0]", 0xf0010000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[1]", 0xf0011000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[2]", 0xf0012000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[3]", 0xf0013000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[4]", 0xf0014000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[5]", 0xf0015000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[6]", 0xf0016000, 4 * KiB);
- create_unimplemented_device("npcm7xx.gpio[7]", 0xf0017000, 4 * KiB);
create_unimplemented_device("npcm7xx.smbus[0]", 0xf0080000, 4 * KiB);
create_unimplemented_device("npcm7xx.smbus[1]", 0xf0081000, 4 * KiB);
create_unimplemented_device("npcm7xx.smbus[2]", 0xf0082000, 4 * KiB);
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index b0777166e89100bac21ebcb7622ba97e3b59a093..628e77ef6609386559dac97cffe9d1a579387082 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -67,10 +67,10 @@ static void versal_create_apu_gic(Versal *s, qemu_irq *pic)
gicbusdev = SYS_BUS_DEVICE(&s->fpd.apu.gic);
gicdev = DEVICE(&s->fpd.apu.gic);
qdev_prop_set_uint32(gicdev, "revision", 3);
- qdev_prop_set_uint32(gicdev, "num-cpu", 2);
+ qdev_prop_set_uint32(gicdev, "num-cpu", nr_apu_cpus);
qdev_prop_set_uint32(gicdev, "num-irq", XLNX_VERSAL_NR_IRQS + 32);
qdev_prop_set_uint32(gicdev, "len-redist-region-count", 1);
- qdev_prop_set_uint32(gicdev, "redist-region-count[0]", 2);
+ qdev_prop_set_uint32(gicdev, "redist-region-count[0]", nr_apu_cpus);
qdev_prop_set_bit(gicdev, "has-security-extensions", true);
sysbus_realize(SYS_BUS_DEVICE(&s->fpd.apu.gic), &error_fatal);
diff --git a/hw/misc/arm_integrator_debug.c b/hw/misc/arm_integrator_debug.c
index ec0d4b90d3dda68d85b6f9b419b4dac8796b78e2..9a197278290fd457969d684079d7592e3ca075b7 100644
--- a/hw/misc/arm_integrator_debug.c
+++ b/hw/misc/arm_integrator_debug.c
@@ -6,7 +6,7 @@
* to this area.
*
* The real h/w is described at:
- * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0159b/Babbfijf.html
+ * https://developer.arm.com/documentation/dui0159/b/peripherals-and-interfaces/debug-leds-and-dip-switch-interface
*
* Copyright (c) 2013 Alex Bennée <alex@bennee.com>
*
diff --git a/hw/timer/arm_timer.c b/hw/timer/arm_timer.c
index 98e70b2d262b174ab32781e9904ec714c94a0df6..15caff0e41c7efcc4973d81db1eda32a303ea453 100644
--- a/hw/timer/arm_timer.c
+++ b/hw/timer/arm_timer.c
@@ -185,10 +185,11 @@ static arm_timer_state *arm_timer_init(uint32_t freq)
return s;
}
-/* ARM PrimeCell SP804 dual timer module.
+/*
+ * ARM PrimeCell SP804 dual timer module.
* Docs at
- * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0271d/index.html
-*/
+ * https://developer.arm.com/documentation/ddi0271/latest/
+ */
#define TYPE_SP804 "sp804"
OBJECT_DECLARE_SIMPLE_TYPE(SP804State, SP804)
diff --git a/include/hw/dma/pl080.h b/include/hw/dma/pl080.h
index 1883f042701ff727ab0d460ac1d831dff09c730f..3c9659e4381f9218501c35cd191b1a08ebcf4ca0 100644
--- a/include/hw/dma/pl080.h
+++ b/include/hw/dma/pl080.h
@@ -10,11 +10,12 @@
* (at your option) any later version.
*/
-/* This is a model of the Arm PrimeCell PL080/PL081 DMA controller:
+/*
+ * This is a model of the Arm PrimeCell PL080/PL081 DMA controller:
* The PL080 TRM is:
- * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0196g/DDI0196.pdf
+ * https://developer.arm.com/documentation/ddi0196/latest
* and the PL081 TRM is:
- * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0218e/DDI0218.pdf
+ * https://developer.arm.com/documentation/ddi0218/latest
*
* QEMU interface:
* + sysbus IRQ 0: DMACINTR combined interrupt line
diff --git a/include/hw/misc/arm_integrator_debug.h b/include/hw/misc/arm_integrator_debug.h
index 0077dacb44d33fc8a5062aedd74fc76843c0c94a..798b08216461b0e6ff196ddd2f70f454c0de3097 100644
--- a/include/hw/misc/arm_integrator_debug.h
+++ b/include/hw/misc/arm_integrator_debug.h
@@ -3,7 +3,7 @@
*
* Browse the data sheet:
*
- * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0159b/Babbfijf.html
+ * https://developer.arm.com/documentation/dui0159/b/peripherals-and-interfaces/debug-leds-and-dip-switch-interface
*
* Copyright (c) 2013 Alex Bennée <alex@bennee.com>
*
diff --git a/include/hw/ssi/pl022.h b/include/hw/ssi/pl022.h
index 545b52689c157f8086d2ca0bb4516b7757cc2d0d..25d58db5f32607b0bd62d8ed783c96f634e54e18 100644
--- a/include/hw/ssi/pl022.h
+++ b/include/hw/ssi/pl022.h
@@ -9,9 +9,10 @@
* (at your option) any later version.
*/
-/* This is a model of the Arm PrimeCell PL022 synchronous serial port.
+/*
+ * This is a model of the Arm PrimeCell PL022 synchronous serial port.
* The PL022 TRM is:
- * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0194h/DDI0194H_ssp_pl022_trm.pdf
+ * https://developer.arm.com/documentation/ddi0194/latest
*
* QEMU interface:
* + sysbus IRQ: SSPINTR combined interrupt line
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 8ddb2556f8cf6f4d749fc07834baa005bbfa8015..5cf6c056c50f19cdc18dcaad83ad87882e76a67f 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2202,6 +2202,10 @@ static void arm_max_initfn(Object *obj)
t = FIELD_DP32(t, ID_MMFR4, CNP, 1); /* TTCNP */
t = FIELD_DP32(t, ID_MMFR4, XNX, 1); /* TTS2UXN */
cpu->isar.id_mmfr4 = t;
+
+ t = cpu->isar.id_pfr0;
+ t = FIELD_DP32(t, ID_PFR0, DIT, 1);
+ cpu->isar.id_pfr0 = t;
}
#endif
}
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index d080239863c0769017ec5a47f392b893a71b7004..f240275407bc82c0d71516b88fc76b2ee5e072a4 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1243,6 +1243,7 @@ void pmu_init(ARMCPU *cpu);
#define CPSR_IT_2_7 (0xfc00U)
#define CPSR_GE (0xfU << 16)
#define CPSR_IL (1U << 20)
+#define CPSR_DIT (1U << 21)
#define CPSR_PAN (1U << 22)
#define CPSR_J (1U << 24)
#define CPSR_IT_0_1 (3U << 25)
@@ -1310,6 +1311,7 @@ void pmu_init(ARMCPU *cpu);
#define PSTATE_SS (1U << 21)
#define PSTATE_PAN (1U << 22)
#define PSTATE_UAO (1U << 23)
+#define PSTATE_DIT (1U << 24)
#define PSTATE_TCO (1U << 25)
#define PSTATE_V (1U << 28)
#define PSTATE_C (1U << 29)
@@ -3876,6 +3878,11 @@ static inline bool isar_feature_aa32_tts2uxn(const ARMISARegisters *id)
return FIELD_EX32(id->id_mmfr4, ID_MMFR4, XNX) != 0;
}
+static inline bool isar_feature_aa32_dit(const ARMISARegisters *id)
+{
+ return FIELD_EX32(id->id_pfr0, ID_PFR0, DIT) != 0;
+}
+
/*
* 64-bit feature tests via id registers.
*/
@@ -4033,6 +4040,11 @@ static inline bool isar_feature_aa64_aa32(const ARMISARegisters *id)
return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, EL0) >= 2;
}
+static inline bool isar_feature_aa64_aa32_el1(const ARMISARegisters *id)
+{
+ return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, EL1) >= 2;
+}
+
static inline bool isar_feature_aa64_sve(const ARMISARegisters *id)
{
return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, SVE) != 0;
@@ -4120,6 +4132,11 @@ static inline bool isar_feature_aa64_tts2uxn(const ARMISARegisters *id)
return FIELD_EX64(id->id_aa64mmfr1, ID_AA64MMFR1, XNX) != 0;
}
+static inline bool isar_feature_aa64_dit(const ARMISARegisters *id)
+{
+ return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, DIT) != 0;
+}
+
/*
* Feature tests for "does this exist in either 32-bit or 64-bit?"
*/
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 10c51181767d11253fafe3244601c91dde06151c..c255f1bcc3935f9db1f87f8f2f85d670c4b7c6be 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -669,6 +669,7 @@ static void aarch64_max_initfn(Object *obj)
t = FIELD_DP64(t, ID_AA64PFR0, FP, 1);
t = FIELD_DP64(t, ID_AA64PFR0, ADVSIMD, 1);
t = FIELD_DP64(t, ID_AA64PFR0, SEL2, 1);
+ t = FIELD_DP64(t, ID_AA64PFR0, DIT, 1);
cpu->isar.id_aa64pfr0 = t;
t = cpu->isar.id_aa64pfr1;
@@ -718,6 +719,10 @@ static void aarch64_max_initfn(Object *obj)
u = FIELD_DP32(u, ID_ISAR6, SPECRES, 1);
cpu->isar.id_isar6 = u;
+ u = cpu->isar.id_pfr0;
+ u = FIELD_DP32(u, ID_PFR0, DIT, 1);
+ cpu->isar.id_pfr0 = u;
+
u = cpu->isar.id_mmfr3;
u = FIELD_DP32(u, ID_MMFR3, PAN, 2); /* ATS1E1 */
cpu->isar.id_mmfr3 = u;
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index c426c23d2c4ef763f22db81590bc98204dcd4945..ae611d73c2c4ea2a3d25624073aca77ba6d14b1d 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -945,11 +945,31 @@ static int el_from_spsr(uint32_t spsr)
}
}
+static void cpsr_write_from_spsr_elx(CPUARMState *env,
+ uint32_t val)
+{
+ uint32_t mask;
+
+ /* Save SPSR_ELx.SS into PSTATE. */
+ env->pstate = (env->pstate & ~PSTATE_SS) | (val & PSTATE_SS);
+ val &= ~PSTATE_SS;
+
+ /* Move DIT to the correct location for CPSR */
+ if (val & PSTATE_DIT) {
+ val &= ~PSTATE_DIT;
+ val |= CPSR_DIT;
+ }
+
+ mask = aarch32_cpsr_valid_mask(env->features, \
+ &env_archcpu(env)->isar);
+ cpsr_write(env, val, mask, CPSRWriteRaw);
+}
+
void HELPER(exception_return)(CPUARMState *env, uint64_t new_pc)
{
int cur_el = arm_current_el(env);
unsigned int spsr_idx = aarch64_banked_spsr_index(cur_el);
- uint32_t mask, spsr = env->banked_spsr[spsr_idx];
+ uint32_t spsr = env->banked_spsr[spsr_idx];
int new_el;
bool return_to_aa64 = (spsr & PSTATE_nRW) == 0;
@@ -998,10 +1018,9 @@ void HELPER(exception_return)(CPUARMState *env, uint64_t new_pc)
* will sort the register banks out for us, and we've already
* caught all the bad-mode cases in el_from_spsr().
*/
- mask = aarch32_cpsr_valid_mask(env->features, &env_archcpu(env)->isar);
- cpsr_write(env, spsr, mask, CPSRWriteRaw);
+ cpsr_write_from_spsr_elx(env, spsr);
if (!arm_singlestep_active(env)) {
- env->uncached_cpsr &= ~PSTATE_SS;
+ env->pstate &= ~PSTATE_SS;
}
aarch64_sync_64_to_32(env);
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 1a64bd748ce5581b526a35467f0996219c0ae5d5..0e1a3b94211cab3a43815824ea4b84a976dace21 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -38,6 +38,7 @@
#endif
#define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
+#define PMCR_NUM_COUNTERS 4 /* QEMU IMPDEF choice */
#ifndef CONFIG_USER_ONLY
@@ -2024,7 +2025,10 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
ARMCPU *cpu = env_archcpu(env);
if (ri->state == ARM_CP_STATE_AA64) {
- value |= SCR_FW | SCR_AW; /* these two bits are RES1. */
+ if (arm_feature(env, ARM_FEATURE_AARCH64) &&
+ !cpu_isar_feature(aa64_aa32_el1, cpu)) {
+ value |= SCR_FW | SCR_AW; /* these two bits are RES1. */
+ }
valid_mask &= ~SCR_NET;
if (cpu_isar_feature(aa64_lor, cpu)) {
@@ -2063,6 +2067,15 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
raw_write(env, ri, value);
}
+static void scr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
+{
+ /*
+ * scr_write will set the RES1 bits on an AArch64-only CPU.
+ * The reset value will be 0x30 on an AArch64-only CPU and 0 otherwise.
+ */
+ scr_write(env, ri, 0);
+}
+
static CPAccessResult access_aa64_tid2(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
@@ -4419,6 +4432,24 @@ static const ARMCPRegInfo uao_reginfo = {
.readfn = aa64_uao_read, .writefn = aa64_uao_write
};
+static uint64_t aa64_dit_read(CPUARMState *env, const ARMCPRegInfo *ri)
+{
+ return env->pstate & PSTATE_DIT;
+}
+
+static void aa64_dit_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
+{
+ env->pstate = (env->pstate & ~PSTATE_DIT) | (value & PSTATE_DIT);
+}
+
+static const ARMCPRegInfo dit_reginfo = {
+ .name = "DIT", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 3, .crn = 4, .crm = 2, .opc2 = 5,
+ .type = ARM_CP_NO_RAW, .access = PL0_RW,
+ .readfn = aa64_dit_read, .writefn = aa64_dit_write
+};
+
static CPAccessResult aa64_cacheop_poc_access(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
@@ -5705,13 +5736,11 @@ static const ARMCPRegInfo el2_cp_reginfo[] = {
.writefn = gt_hyp_ctl_write, .raw_writefn = raw_write },
#endif
/* The only field of MDCR_EL2 that has a defined architectural reset value
- * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we
- * don't implement any PMU event counters, so using zero as a reset
- * value for MDCR_EL2 is okay
+ * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N.
*/
{ .name = "MDCR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 1,
- .access = PL2_RW, .resetvalue = 0,
+ .access = PL2_RW, .resetvalue = PMCR_NUM_COUNTERS,
.fieldoffset = offsetof(CPUARMState, cp15.mdcr_el2), },
{ .name = "HPFAR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 4,
@@ -5785,7 +5814,7 @@ static const ARMCPRegInfo el3_cp_reginfo[] = {
{ .name = "SCR_EL3", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.scr_el3),
- .resetvalue = 0, .writefn = scr_write },
+ .resetfn = scr_reset, .writefn = scr_write },
{ .name = "SCR", .type = ARM_CP_ALIAS | ARM_CP_NEWEL,
.cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL1_RW, .accessfn = access_trap_aa32s_el1,
@@ -6642,7 +6671,7 @@ static void define_pmu_regs(ARMCPU *cpu)
* field as main ID register, and we implement four counters in
* addition to the cycle count register.
*/
- unsigned int i, pmcrn = 4;
+ unsigned int i, pmcrn = PMCR_NUM_COUNTERS;
ARMCPRegInfo pmcr = {
.name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0,
.access = PL0_RW,
@@ -8212,6 +8241,10 @@ void register_cp_regs_for_features(ARMCPU *cpu)
define_one_arm_cp_reg(cpu, &uao_reginfo);
}
+ if (cpu_isar_feature(aa64_dit, cpu)) {
+ define_one_arm_cp_reg(cpu, &dit_reginfo);
+ }
+
if (arm_feature(env, ARM_FEATURE_EL2) && cpu_isar_feature(aa64_vh, cpu)) {
define_arm_cp_regs(cpu, vhe_reginfo);
}
@@ -9411,7 +9444,7 @@ static void take_aarch32_exception(CPUARMState *env, int new_mode,
* For exceptions taken to AArch32 we must clear the SS bit in both
* PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now.
*/
- env->uncached_cpsr &= ~PSTATE_SS;
+ env->pstate &= ~PSTATE_SS;
env->spsr = cpsr_read(env);
/* Clear IT bits. */
env->condexec_bits = 0;
@@ -9767,6 +9800,21 @@ static int aarch64_regnum(CPUARMState *env, int aarch32_reg)
}
}
+static uint32_t cpsr_read_for_spsr_elx(CPUARMState *env)
+{
+ uint32_t ret = cpsr_read(env);
+
+ /* Move DIT to the correct location for SPSR_ELx */
+ if (ret & CPSR_DIT) {
+ ret &= ~CPSR_DIT;
+ ret |= PSTATE_DIT;
+ }
+ /* Merge PSTATE.SS into SPSR_ELx */
+ ret |= env->pstate & PSTATE_SS;
+
+ return ret;
+}
+
/* Handle exception entry to a target EL which is using AArch64 */
static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
{
@@ -9889,7 +9937,7 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
aarch64_save_sp(env, arm_current_el(env));
env->elr_el[new_el] = env->pc;
} else {
- old_mode = cpsr_read(env);
+ old_mode = cpsr_read_for_spsr_elx(env);
env->elr_el[new_el] = env->regs[15];
aarch64_sync_32_to_64(env);
@@ -13183,7 +13231,6 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *pflags)
{
uint32_t flags = env->hflags;
- uint32_t pstate_for_ss;
*cs_base = 0;
assert_hflags_rebuild_correctly(env);
@@ -13193,7 +13240,6 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
if (cpu_isar_feature(aa64_bti, env_archcpu(env))) {
flags = FIELD_DP32(flags, TBFLAG_A64, BTYPE, env->btype);
}
- pstate_for_ss = env->pstate;
} else {
*pc = env->regs[15];
@@ -13241,7 +13287,6 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
flags = FIELD_DP32(flags, TBFLAG_AM32, THUMB, env->thumb);
flags = FIELD_DP32(flags, TBFLAG_AM32, CONDEXEC, env->condexec_bits);
- pstate_for_ss = env->uncached_cpsr;
}
/*
@@ -13254,7 +13299,7 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
* SS_ACTIVE is set in hflags; PSTATE_SS is computed every TB.
*/
if (FIELD_EX32(flags, TBFLAG_ANY, SS_ACTIVE) &&
- (pstate_for_ss & PSTATE_SS)) {
+ (env->pstate & PSTATE_SS)) {
flags = FIELD_DP32(flags, TBFLAG_ANY, PSTATE_SS, 1);
}
diff --git a/target/arm/internals.h b/target/arm/internals.h
index 448982dd2f9f3a41eaf30aa7a5fe4f1df9fe8a85..b251fe44506b0926443584cb5b355a0d220fc7b0 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1228,6 +1228,9 @@ static inline uint32_t aarch32_cpsr_valid_mask(uint64_t features,
if (isar_feature_aa32_pan(id)) {
valid |= CPSR_PAN;
}
+ if (isar_feature_aa32_dit(id)) {
+ valid |= CPSR_DIT;
+ }
return valid;
}
@@ -1246,6 +1249,9 @@ static inline uint32_t aarch64_pstate_valid_mask(const ARMISARegisters *id)
if (isar_feature_aa64_uao(id)) {
valid |= PSTATE_UAO;
}
+ if (isar_feature_aa64_dit(id)) {
+ valid |= PSTATE_DIT;
+ }
if (isar_feature_aa64_mte(id)) {
valid |= PSTATE_TCO;
}
diff --git a/target/arm/machine.c b/target/arm/machine.c
index 581852bc53b8534403486c79d0a516f8ff222ebd..6ad1d306b12a4a34bca4c5d92529ecea75dbf2d2 100644
--- a/target/arm/machine.c
+++ b/target/arm/machine.c
@@ -810,7 +810,7 @@ const VMStateDescription vmstate_arm_cpu = {
VMSTATE_UINT64(env.exclusive_addr, ARMCPU),
VMSTATE_UINT64(env.exclusive_val, ARMCPU),
VMSTATE_UINT64(env.exclusive_high, ARMCPU),
- VMSTATE_UINT64(env.features, ARMCPU),
+ VMSTATE_UNUSED(sizeof(uint64_t)),
VMSTATE_UINT32(env.exception.syndrome, ARMCPU),
VMSTATE_UINT32(env.exception.fsr, ARMCPU),
VMSTATE_UINT64(env.exception.vaddress, ARMCPU),
diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index 5e0f123043b592a98afe635afaa3918131dfd4a1..65cb37d088f86b507b1070632f6a8fbf4be9d068 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -389,14 +389,7 @@ void HELPER(exception_bkpt_insn)(CPUARMState *env, uint32_t syndrome)
uint32_t HELPER(cpsr_read)(CPUARMState *env)
{
- /*
- * We store the ARMv8 PSTATE.SS bit in env->uncached_cpsr.
- * This is convenient for populating SPSR_ELx, but must be
- * hidden from aarch32 mode, where it is not visible.
- *
- * TODO: ARMv8.4-DIT -- need to move SS somewhere else.
- */
- return cpsr_read(env) & ~(CPSR_EXEC | PSTATE_SS);
+ return cpsr_read(env) & ~CPSR_EXEC;
}
void HELPER(cpsr_write)(CPUARMState *env, uint32_t val, uint32_t mask)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index ffc060e5d70ca5bc68594e6c3bc084d8e86d67a0..1c4b8d02f3b8a7ad87a42c220395bfcb1dabca21 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -1700,6 +1700,18 @@ static void handle_msr_i(DisasContext *s, uint32_t insn,
tcg_temp_free_i32(t1);
break;
+ case 0x1a: /* DIT */
+ if (!dc_isar_feature(aa64_dit, s)) {
+ goto do_unallocated;
+ }
+ if (crm & 1) {
+ set_pstate_bits(PSTATE_DIT);
+ } else {
+ clear_pstate_bits(PSTATE_DIT);
+ }
+ /* There's no need to rebuild hflags because DIT is a nop */
+ break;
+
case 0x1e: /* DAIFSet */
t1 = tcg_const_i32(crm);
gen_helper_msr_i_daifset(cpu_env, t1);