* [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus
@ 2022-05-05 18:49 Richard Henderson
2022-05-05 18:49 ` [PATCH v5 01/24] target/arm: Handle cpreg registration for missing EL Richard Henderson
` (23 more replies)
0 siblings, 24 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm
Changes for v4:
* Rebase on master, where the second third is upstream.
* Add ARM_CP_EL3_NO_EL2_C_NZ flag, and use that in the
two cpregs called out by rule RJFFP that become constant
but not zero.
* Set SCTLR_EL1.TSCXT for user-only.
Patches lacking review:
01-target-arm-Handle-cpreg-registration-for-missing-.patch
02-target-arm-Drop-EL3-no-EL2-fallbacks.patch
20-target-arm-Enable-FEAT_CSV2_2-for-cpu-max.patch
r~
Richard Henderson (24):
target/arm: Handle cpreg registration for missing EL
target/arm: Drop EL3 no EL2 fallbacks
target/arm: Merge zcr reginfo
target/arm: Adjust definition of CONTEXTIDR_EL2
target/arm: Move cortex impdef sysregs to cpu_tcg.c
target/arm: Update qemu-system-arm -cpu max to cortex-a57
target/arm: Set ID_DFR0.PerfMon for qemu-system-arm -cpu max
target/arm: Split out aa32_max_features
target/arm: Annotate arm_max_initfn with FEAT identifiers
target/arm: Use field names for manipulating EL2 and EL3 modes
target/arm: Enable FEAT_Debugv8p2 for -cpu max
target/arm: Enable FEAT_Debugv8p4 for -cpu max
target/arm: Add minimal RAS registers
target/arm: Enable SCR and HCR bits for RAS
target/arm: Implement virtual SError exceptions
target/arm: Implement ESB instruction
target/arm: Enable FEAT_RAS for -cpu max
target/arm: Enable FEAT_IESB for -cpu max
target/arm: Enable FEAT_CSV2 for -cpu max
target/arm: Enable FEAT_CSV2_2 for -cpu max
target/arm: Enable FEAT_CSV3 for -cpu max
target/arm: Enable FEAT_DGH for -cpu max
target/arm: Define cortex-a76
target/arm: Define neoverse-n1
docs/system/arm/emulation.rst | 10 +
docs/system/arm/virt.rst | 2 +
target/arm/cpregs.h | 11 +
target/arm/cpu.h | 23 ++
target/arm/helper.h | 1 +
target/arm/internals.h | 16 +
target/arm/syndrome.h | 5 +
target/arm/a32.decode | 16 +-
target/arm/t32.decode | 18 +-
hw/arm/sbsa-ref.c | 2 +
hw/arm/virt.c | 2 +
target/arm/cpu.c | 66 +++-
target/arm/cpu64.c | 353 +++++++++++---------
target/arm/cpu_tcg.c | 227 +++++++++----
target/arm/helper.c | 600 ++++++++++++++++++++--------------
target/arm/op_helper.c | 43 +++
target/arm/translate-a64.c | 18 +
target/arm/translate.c | 23 ++
18 files changed, 949 insertions(+), 487 deletions(-)
--
2.34.1
^ permalink raw reply [flat|nested] 28+ messages in thread
* [PATCH v5 01/24] target/arm: Handle cpreg registration for missing EL
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-06 11:22 ` Peter Maydell
2022-05-05 18:49 ` [PATCH v5 02/24] target/arm: Drop EL3 no EL2 fallbacks Richard Henderson
` (22 subsequent siblings)
23 siblings, 1 reply; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm
More gracefully handle cpregs when EL2 and/or EL3 are missing.
If the reg is entirely inaccessible, do not register it at all.
If the reg is for EL2, and EL3 is present but EL2 is not,
either discard, squash to res0, const, or keep unchanged.
Per rule RJFFP, mark the 4 aarch32 hypervisor access registers
with ARM_CP_EL3_NO_EL2_KEEP, and mark all of the EL2 address
translation and tlb invalidation "regs" ARM_CP_EL3_NO_EL2_UNDEF.
Mark the 2 virtualization processor id regs ARM_CP_EL3_NO_EL2_C_NZ.
This will simplify cpreg registration for conditional arm features.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v4: Add ARM_CP_EL3_NO_EL2_{UNDEF,KEEP}.
v5: Add ARM_CP_EL3_NO_EL2_C_NZ.
---
target/arm/cpregs.h | 11 +++
target/arm/helper.c | 178 ++++++++++++++++++++++++++++++--------------
2 files changed, 133 insertions(+), 56 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index 73984549d2..db03d6a7e1 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -102,6 +102,17 @@ enum {
ARM_CP_SVE = 1 << 14,
/* Flag: Do not expose in gdb sysreg xml. */
ARM_CP_NO_GDB = 1 << 15,
+ /*
+ * Flags: If EL3 but not EL2...
+ * - UNDEF: discard the cpreg,
+ * - KEEP: retain the cpreg as is,
+ * - C_NZ: set const on the cpreg, but retain resetvalue,
+ * - else: set const on the cpreg, zero resetvalue, aka RES0.
+ * See rule RJFFP in section D1.1.3 of DDI0487H.a.
+ */
+ ARM_CP_EL3_NO_EL2_UNDEF = 1 << 16,
+ ARM_CP_EL3_NO_EL2_KEEP = 1 << 17,
+ ARM_CP_EL3_NO_EL2_C_NZ = 1 << 18,
};
/*
diff --git a/target/arm/helper.c b/target/arm/helper.c
index b4daf4f076..9ab8b65e7b 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5056,16 +5056,17 @@ static const ARMCPRegInfo v8_cp_reginfo[] = {
.access = PL1_RW, .readfn = spsel_read, .writefn = spsel_write },
{ .name = "FPEXC32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 3, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_ALIAS | ARM_CP_FPU,
+ .access = PL2_RW,
+ .type = ARM_CP_ALIAS | ARM_CP_FPU | ARM_CP_EL3_NO_EL2_KEEP,
.fieldoffset = offsetof(CPUARMState, vfp.xregs[ARM_VFP_FPEXC]) },
{ .name = "DACR32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 3, .crm = 0, .opc2 = 0,
- .access = PL2_RW, .resetvalue = 0,
+ .access = PL2_RW, .resetvalue = 0, .type = ARM_CP_EL3_NO_EL2_KEEP,
.writefn = dacr_write, .raw_writefn = raw_write,
.fieldoffset = offsetof(CPUARMState, cp15.dacr32_el2) },
{ .name = "IFSR32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 0, .opc2 = 1,
- .access = PL2_RW, .resetvalue = 0,
+ .access = PL2_RW, .resetvalue = 0, .type = ARM_CP_EL3_NO_EL2_KEEP,
.fieldoffset = offsetof(CPUARMState, cp15.ifsr32_el2) },
{ .name = "SPSR_IRQ", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
@@ -5542,27 +5543,27 @@ static const ARMCPRegInfo el2_cp_reginfo[] = {
.writefn = tlbimva_hyp_is_write },
{ .name = "TLBI_ALLE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 0,
- .type = ARM_CP_NO_RAW, .access = PL2_W,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_alle2_write },
{ .name = "TLBI_VAE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 1,
- .type = ARM_CP_NO_RAW, .access = PL2_W,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_vae2_write },
{ .name = "TLBI_VALE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 5,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_vae2_write },
{ .name = "TLBI_ALLE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 0,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_alle2is_write },
{ .name = "TLBI_VAE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 1,
- .type = ARM_CP_NO_RAW, .access = PL2_W,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_vae2is_write },
{ .name = "TLBI_VALE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 5,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_vae2is_write },
#ifndef CONFIG_USER_ONLY
/* Unlike the other EL2-related AT operations, these must
@@ -5572,11 +5573,13 @@ static const ARMCPRegInfo el2_cp_reginfo[] = {
{ .name = "AT_S1E2R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 0,
.access = PL2_W, .accessfn = at_s1e2_access,
- .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC, .writefn = ats_write64 },
+ .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC | ARM_CP_EL3_NO_EL2_UNDEF,
+ .writefn = ats_write64 },
{ .name = "AT_S1E2W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 1,
.access = PL2_W, .accessfn = at_s1e2_access,
- .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC, .writefn = ats_write64 },
+ .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC | ARM_CP_EL3_NO_EL2_UNDEF,
+ .writefn = ats_write64 },
/* The AArch32 ATS1H* operations are CONSTRAINED UNPREDICTABLE
* if EL2 is not implemented; we choose to UNDEF. Behaviour at EL3
* with SCR.NS == 0 outside Monitor mode is UNPREDICTABLE; we choose
@@ -6076,7 +6079,7 @@ static const ARMCPRegInfo debug_cp_reginfo[] = {
{ .name = "DBGVCR32_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 2, .opc1 = 4, .crn = 0, .crm = 7, .opc2 = 0,
.access = PL2_RW, .accessfn = access_tda,
- .type = ARM_CP_NOP },
+ .type = ARM_CP_NOP | ARM_CP_EL3_NO_EL2_KEEP },
/* Dummy MDCCINT_EL1, since we don't implement the Debug Communications
* Channel but Linux may try to access this register. The 32-bit
* alias is DBGDCCINT.
@@ -6892,11 +6895,11 @@ static const ARMCPRegInfo tlbirange_reginfo[] = {
.access = PL2_W, .type = ARM_CP_NOP },
{ .name = "TLBI_RVAE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 2, .opc2 = 1,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_rvae2is_write },
{ .name = "TLBI_RVALE2IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 2, .opc2 = 5,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_rvae2is_write },
{ .name = "TLBI_RIPAS2E1", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 4, .opc2 = 2,
@@ -6906,19 +6909,19 @@ static const ARMCPRegInfo tlbirange_reginfo[] = {
.access = PL2_W, .type = ARM_CP_NOP },
{ .name = "TLBI_RVAE2OS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 5, .opc2 = 1,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_rvae2is_write },
{ .name = "TLBI_RVALE2OS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 5, .opc2 = 5,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_rvae2is_write },
{ .name = "TLBI_RVAE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 6, .opc2 = 1,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_rvae2_write },
{ .name = "TLBI_RVALE2", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 6, .opc2 = 5,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_rvae2_write },
{ .name = "TLBI_RVAE3IS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 6, .crn = 8, .crm = 2, .opc2 = 1,
@@ -6973,11 +6976,11 @@ static const ARMCPRegInfo tlbios_reginfo[] = {
.writefn = tlbi_aa64_vae1is_write },
{ .name = "TLBI_ALLE2OS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 1, .opc2 = 0,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_alle2is_write },
{ .name = "TLBI_VAE2OS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 1, .opc2 = 1,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_vae2is_write },
{ .name = "TLBI_ALLE1OS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 1, .opc2 = 4,
@@ -6985,7 +6988,7 @@ static const ARMCPRegInfo tlbios_reginfo[] = {
.writefn = tlbi_aa64_alle1is_write },
{ .name = "TLBI_VALE2OS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 1, .opc2 = 5,
- .access = PL2_W, .type = ARM_CP_NO_RAW,
+ .access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_EL3_NO_EL2_UNDEF,
.writefn = tlbi_aa64_vae2is_write },
{ .name = "TLBI_VMALLS12E1OS", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 8, .crm = 1, .opc2 = 6,
@@ -7905,21 +7908,24 @@ void register_cp_regs_for_features(ARMCPU *cpu)
{ .name = "VPIDR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
- .resetvalue = cpu->midr, .type = ARM_CP_ALIAS,
+ .resetvalue = cpu->midr,
+ .type = ARM_CP_ALIAS | ARM_CP_EL3_NO_EL2_C_NZ,
.fieldoffset = offsetoflow32(CPUARMState, cp15.vpidr_el2) },
{ .name = "VPIDR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
.access = PL2_RW, .resetvalue = cpu->midr,
+ .type = ARM_CP_EL3_NO_EL2_C_NZ,
.fieldoffset = offsetof(CPUARMState, cp15.vpidr_el2) },
{ .name = "VMPIDR", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 5,
.access = PL2_RW, .accessfn = access_el3_aa32ns,
- .resetvalue = vmpidr_def, .type = ARM_CP_ALIAS,
+ .resetvalue = vmpidr_def,
+ .type = ARM_CP_ALIAS | ARM_CP_EL3_NO_EL2_C_NZ,
.fieldoffset = offsetoflow32(CPUARMState, cp15.vmpidr_el2) },
{ .name = "VMPIDR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 5,
- .access = PL2_RW,
- .resetvalue = vmpidr_def,
+ .access = PL2_RW, .resetvalue = vmpidr_def,
+ .type = ARM_CP_EL3_NO_EL2_C_NZ,
.fieldoffset = offsetof(CPUARMState, cp15.vmpidr_el2) },
};
define_arm_cp_regs(cpu, vpidr_regs);
@@ -8506,13 +8512,14 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
int crm, int opc1, int opc2,
const char *name)
{
+ CPUARMState *env = &cpu->env;
uint32_t key;
ARMCPRegInfo *r2;
bool is64 = r->type & ARM_CP_64BIT;
bool ns = secstate & ARM_CP_SECSTATE_NS;
int cp = r->cp;
- bool isbanked;
size_t name_len;
+ bool make_const;
switch (state) {
case ARM_CP_STATE_AA32:
@@ -8547,6 +8554,32 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
}
}
+ /*
+ * Eliminate registers that are not present because the EL is missing.
+ * Doing this here makes it easier to put all registers for a given
+ * feature into the same ARMCPRegInfo array and define them all at once.
+ */
+ make_const = false;
+ if (arm_feature(env, ARM_FEATURE_EL3)) {
+ /*
+ * An EL2 register without EL2 but with EL3 is (usually) RES0.
+ * See rule RJFFP in section D1.1.3 of DDI0487H.a.
+ */
+ int min_el = ctz32(r->access) / 2;
+ if (min_el == 2 && !arm_feature(env, ARM_FEATURE_EL2)) {
+ if (r->type & ARM_CP_EL3_NO_EL2_UNDEF) {
+ return;
+ }
+ make_const = !(r->type & ARM_CP_EL3_NO_EL2_KEEP);
+ }
+ } else {
+ CPAccessRights max_el = (arm_feature(env, ARM_FEATURE_EL2)
+ ? PL2_RW : PL1_RW);
+ if ((r->access & max_el) == 0) {
+ return;
+ }
+ }
+
/* Combine cpreg and name into one allocation. */
name_len = strlen(name) + 1;
r2 = g_malloc(sizeof(*r2) + name_len);
@@ -8567,44 +8600,77 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
r2->opaque = opaque;
}
- isbanked = r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1];
- if (isbanked) {
+ if (make_const) {
+ /* This should not have been a very special register to begin. */
+ int old_special = r2->type & ARM_CP_SPECIAL_MASK;
+ assert(old_special == 0 || old_special == ARM_CP_NOP);
/*
- * Register is banked (using both entries in array).
- * Overwriting fieldoffset as the array is only used to define
- * banked registers but later only fieldoffset is used.
+ * Set the special function to CONST, retaining the other flags.
+ * This is important for e.g. ARM_CP_SVE so that we still
+ * take the SVE trap if CPTR_EL3.EZ == 0.
*/
- r2->fieldoffset = r->bank_fieldoffsets[ns];
- }
+ r2->type = (r2->type & ~ARM_CP_SPECIAL_MASK) | ARM_CP_CONST;
+ /*
+ * Usually, these registers become RES0, but there are a few
+ * special cases like VPIDR_EL2 which have a constant non-zero
+ * value with writes ignored.
+ */
+ if (!(r->type & ARM_CP_EL3_NO_EL2_C_NZ)) {
+ r2->resetvalue = 0;
+ }
+ /*
+ * ARM_CP_CONST has precedence, so removing the callbacks and
+ * offsets are not strictly necessary, but it is potentially
+ * less confusing to debug later.
+ */
+ r2->readfn = NULL;
+ r2->writefn = NULL;
+ r2->raw_readfn = NULL;
+ r2->raw_writefn = NULL;
+ r2->resetfn = NULL;
+ r2->fieldoffset = 0;
+ r2->bank_fieldoffsets[0] = 0;
+ r2->bank_fieldoffsets[1] = 0;
+ } else {
+ bool isbanked = r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1];
- if (state == ARM_CP_STATE_AA32) {
if (isbanked) {
/*
- * If the register is banked then we don't need to migrate or
- * reset the 32-bit instance in certain cases:
- *
- * 1) If the register has both 32-bit and 64-bit instances then we
- * can count on the 64-bit instance taking care of the
- * non-secure bank.
- * 2) If ARMv8 is enabled then we can count on a 64-bit version
- * taking care of the secure bank. This requires that separate
- * 32 and 64-bit definitions are provided.
+ * Register is banked (using both entries in array).
+ * Overwriting fieldoffset as the array is only used to define
+ * banked registers but later only fieldoffset is used.
*/
- if ((r->state == ARM_CP_STATE_BOTH && ns) ||
- (arm_feature(&cpu->env, ARM_FEATURE_V8) && !ns)) {
+ r2->fieldoffset = r->bank_fieldoffsets[ns];
+ }
+ if (state == ARM_CP_STATE_AA32) {
+ if (isbanked) {
+ /*
+ * If the register is banked then we don't need to migrate or
+ * reset the 32-bit instance in certain cases:
+ *
+ * 1) If the register has both 32-bit and 64-bit instances
+ * then we can count on the 64-bit instance taking care
+ * of the non-secure bank.
+ * 2) If ARMv8 is enabled then we can count on a 64-bit
+ * version taking care of the secure bank. This requires
+ * that separate 32 and 64-bit definitions are provided.
+ */
+ if ((r->state == ARM_CP_STATE_BOTH && ns) ||
+ (arm_feature(env, ARM_FEATURE_V8) && !ns)) {
+ r2->type |= ARM_CP_ALIAS;
+ }
+ } else if ((secstate != r->secure) && !ns) {
+ /*
+ * The register is not banked so we only want to allow
+ * migration of the non-secure instance.
+ */
r2->type |= ARM_CP_ALIAS;
}
- } else if ((secstate != r->secure) && !ns) {
- /*
- * The register is not banked so we only want to allow migration
- * of the non-secure instance.
- */
- r2->type |= ARM_CP_ALIAS;
- }
- if (HOST_BIG_ENDIAN &&
- r->state == ARM_CP_STATE_BOTH && r2->fieldoffset) {
- r2->fieldoffset += sizeof(uint32_t);
+ if (HOST_BIG_ENDIAN &&
+ r->state == ARM_CP_STATE_BOTH && r2->fieldoffset) {
+ r2->fieldoffset += sizeof(uint32_t);
+ }
}
}
@@ -8615,7 +8681,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
* multiple times. Special registers (ie NOP/WFI) are
* never migratable and not even raw-accessible.
*/
- if (r->type & ARM_CP_SPECIAL_MASK) {
+ if (r2->type & ARM_CP_SPECIAL_MASK) {
r2->type |= ARM_CP_NO_RAW;
}
if (((r->crm == CP_ANY) && crm != 0) ||
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 02/24] target/arm: Drop EL3 no EL2 fallbacks
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
2022-05-05 18:49 ` [PATCH v5 01/24] target/arm: Handle cpreg registration for missing EL Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-06 11:36 ` Peter Maydell
2022-05-05 18:49 ` [PATCH v5 03/24] target/arm: Merge zcr reginfo Richard Henderson
` (21 subsequent siblings)
23 siblings, 1 reply; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm
Drop el3_no_el2_cp_reginfo, el3_no_el2_v8_cp_reginfo,
and the local vpidr_regs definition, and rely on the
squasing to ARM_CP_CONST while registering.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 158 ++++----------------------------------------
1 file changed, 13 insertions(+), 145 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 9ab8b65e7b..ea2788b3d5 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5099,124 +5099,6 @@ static const ARMCPRegInfo v8_cp_reginfo[] = {
.fieldoffset = offsetoflow32(CPUARMState, cp15.mdcr_el3) },
};
-/* Used to describe the behaviour of EL2 regs when EL2 does not exist. */
-static const ARMCPRegInfo el3_no_el2_cp_reginfo[] = {
- { .name = "VBAR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0,
- .access = PL2_RW,
- .readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
- { .name = "HCR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
- .access = PL2_RW,
- .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "HACR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 7,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "ESR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 5, .crm = 2, .opc2 = 0,
- .access = PL2_RW,
- .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CPTR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 2,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "MAIR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "HMAIR1", .state = ARM_CP_STATE_AA32,
- .cp = 15, .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 1,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "AMAIR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 10, .crm = 3, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "HAMAIR1", .state = ARM_CP_STATE_AA32,
- .cp = 15, .opc1 = 4, .crn = 10, .crm = 3, .opc2 = 1,
- .access = PL2_RW, .type = ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "AFSR0_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 5, .crm = 1, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "AFSR1_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 5, .crm = 1, .opc2 = 1,
- .access = PL2_RW, .type = ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "TCR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 2,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "VTCR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 2,
- .access = PL2_RW, .accessfn = access_el3_aa32ns,
- .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "VTTBR", .state = ARM_CP_STATE_AA32,
- .cp = 15, .opc1 = 6, .crm = 2,
- .access = PL2_RW, .accessfn = access_el3_aa32ns,
- .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
- { .name = "VTTBR_EL2", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "SCTLR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "TPIDR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 2,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "TTBR0_EL2", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "HTTBR", .cp = 15, .opc1 = 4, .crm = 2,
- .access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "CNTHCTL_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 14, .crm = 1, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CNTVOFF_EL2", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 4, .crn = 14, .crm = 0, .opc2 = 3,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CNTVOFF", .cp = 15, .opc1 = 4, .crm = 14,
- .access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "CNTHP_CVAL_EL2", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 2,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CNTHP_CVAL", .cp = 15, .opc1 = 6, .crm = 14,
- .access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_CONST,
- .resetvalue = 0 },
- { .name = "CNTHP_TVAL_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CNTHP_CTL_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 14, .crm = 2, .opc2 = 1,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "MDCR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 1,
- .access = PL2_RW, .accessfn = access_tda,
- .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "HPFAR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 4,
- .access = PL2_RW, .accessfn = access_el3_aa32ns,
- .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "HSTR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 3,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "FAR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "HIFAR", .state = ARM_CP_STATE_AA32,
- .type = ARM_CP_CONST,
- .cp = 15, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 2,
- .access = PL2_RW, .resetvalue = 0 },
-};
-
-/* Ditto, but for registers which exist in ARMv8 but not v7 */
-static const ARMCPRegInfo el3_no_el2_v8_cp_reginfo[] = {
- { .name = "HCR2", .state = ARM_CP_STATE_AA32,
- .cp = 15, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 4,
- .access = PL2_RW,
- .type = ARM_CP_CONST, .resetvalue = 0 },
-};
-
static void do_hcr_write(CPUARMState *env, uint64_t value, uint64_t valid_mask)
{
ARMCPU *cpu = env_archcpu(env);
@@ -7902,7 +7784,17 @@ void register_cp_regs_for_features(ARMCPU *cpu)
define_arm_cp_regs(cpu, v8_idregs);
define_arm_cp_regs(cpu, v8_cp_reginfo);
}
- if (arm_feature(env, ARM_FEATURE_EL2)) {
+
+ /*
+ * Register the base EL2 cpregs.
+ * Pre v8, these registers are implemented only as part of the
+ * Virtualization Extensions (EL2 present). Beginning with v8,
+ * if EL2 is missing but EL3 is enabled, mostly these become
+ * RES0 from EL3, with some specific exceptions.
+ */
+ if (arm_feature(env, ARM_FEATURE_EL2)
+ || (arm_feature(env, ARM_FEATURE_EL3)
+ && arm_feature(env, ARM_FEATURE_V8))) {
uint64_t vmpidr_def = mpidr_read_val(env);
ARMCPRegInfo vpidr_regs[] = {
{ .name = "VPIDR", .state = ARM_CP_STATE_AA32,
@@ -7946,33 +7838,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
};
define_one_arm_cp_reg(cpu, &rvbar);
}
- } else {
- /* If EL2 is missing but higher ELs are enabled, we need to
- * register the no_el2 reginfos.
- */
- if (arm_feature(env, ARM_FEATURE_EL3)) {
- /* When EL3 exists but not EL2, VPIDR and VMPIDR take the value
- * of MIDR_EL1 and MPIDR_EL1.
- */
- ARMCPRegInfo vpidr_regs[] = {
- { .name = "VPIDR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
- .access = PL2_RW, .accessfn = access_el3_aa32ns,
- .type = ARM_CP_CONST, .resetvalue = cpu->midr,
- .fieldoffset = offsetof(CPUARMState, cp15.vpidr_el2) },
- { .name = "VMPIDR_EL2", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 5,
- .access = PL2_RW, .accessfn = access_el3_aa32ns,
- .type = ARM_CP_NO_RAW,
- .writefn = arm_cp_write_ignore, .readfn = mpidr_read },
- };
- define_arm_cp_regs(cpu, vpidr_regs);
- define_arm_cp_regs(cpu, el3_no_el2_cp_reginfo);
- if (arm_feature(env, ARM_FEATURE_V8)) {
- define_arm_cp_regs(cpu, el3_no_el2_v8_cp_reginfo);
- }
- }
}
+
+ /* Register the base EL3 cpregs. */
if (arm_feature(env, ARM_FEATURE_EL3)) {
define_arm_cp_regs(cpu, el3_cp_reginfo);
ARMCPRegInfo el3_regs[] = {
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 03/24] target/arm: Merge zcr reginfo
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
2022-05-05 18:49 ` [PATCH v5 01/24] target/arm: Handle cpreg registration for missing EL Richard Henderson
2022-05-05 18:49 ` [PATCH v5 02/24] target/arm: Drop EL3 no EL2 fallbacks Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 04/24] target/arm: Adjust definition of CONTEXTIDR_EL2 Richard Henderson
` (20 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Drop zcr_no_el2_reginfo and merge the 3 registers into one array,
now that ZCR_EL2 can be squashed to RES0 and ZCR_EL3 dropped
while registering.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 55 ++++++++++++++-------------------------------
1 file changed, 17 insertions(+), 38 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index ea2788b3d5..72d05070f0 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6122,35 +6122,22 @@ static void zcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
}
}
-static const ARMCPRegInfo zcr_el1_reginfo = {
- .name = "ZCR_EL1", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 2, .opc2 = 0,
- .access = PL1_RW, .type = ARM_CP_SVE,
- .fieldoffset = offsetof(CPUARMState, vfp.zcr_el[1]),
- .writefn = zcr_write, .raw_writefn = raw_write
-};
-
-static const ARMCPRegInfo zcr_el2_reginfo = {
- .name = "ZCR_EL2", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 2, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_SVE,
- .fieldoffset = offsetof(CPUARMState, vfp.zcr_el[2]),
- .writefn = zcr_write, .raw_writefn = raw_write
-};
-
-static const ARMCPRegInfo zcr_no_el2_reginfo = {
- .name = "ZCR_EL2", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 2, .opc2 = 0,
- .access = PL2_RW, .type = ARM_CP_SVE,
- .readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore
-};
-
-static const ARMCPRegInfo zcr_el3_reginfo = {
- .name = "ZCR_EL3", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 2, .opc2 = 0,
- .access = PL3_RW, .type = ARM_CP_SVE,
- .fieldoffset = offsetof(CPUARMState, vfp.zcr_el[3]),
- .writefn = zcr_write, .raw_writefn = raw_write
+static const ARMCPRegInfo zcr_reginfo[] = {
+ { .name = "ZCR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 2, .opc2 = 0,
+ .access = PL1_RW, .type = ARM_CP_SVE,
+ .fieldoffset = offsetof(CPUARMState, vfp.zcr_el[1]),
+ .writefn = zcr_write, .raw_writefn = raw_write },
+ { .name = "ZCR_EL2", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 2, .opc2 = 0,
+ .access = PL2_RW, .type = ARM_CP_SVE,
+ .fieldoffset = offsetof(CPUARMState, vfp.zcr_el[2]),
+ .writefn = zcr_write, .raw_writefn = raw_write },
+ { .name = "ZCR_EL3", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 2, .opc2 = 0,
+ .access = PL3_RW, .type = ARM_CP_SVE,
+ .fieldoffset = offsetof(CPUARMState, vfp.zcr_el[3]),
+ .writefn = zcr_write, .raw_writefn = raw_write },
};
void hw_watchpoint_update(ARMCPU *cpu, int n)
@@ -8233,15 +8220,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
}
if (cpu_isar_feature(aa64_sve, cpu)) {
- define_one_arm_cp_reg(cpu, &zcr_el1_reginfo);
- if (arm_feature(env, ARM_FEATURE_EL2)) {
- define_one_arm_cp_reg(cpu, &zcr_el2_reginfo);
- } else {
- define_one_arm_cp_reg(cpu, &zcr_no_el2_reginfo);
- }
- if (arm_feature(env, ARM_FEATURE_EL3)) {
- define_one_arm_cp_reg(cpu, &zcr_el3_reginfo);
- }
+ define_arm_cp_regs(cpu, zcr_reginfo);
}
#ifdef TARGET_AARCH64
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 04/24] target/arm: Adjust definition of CONTEXTIDR_EL2
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (2 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 03/24] target/arm: Merge zcr reginfo Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 05/24] target/arm: Move cortex impdef sysregs to cpu_tcg.c Richard Henderson
` (19 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This register is present for either VHE or Debugv8p2.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v3: Rely on EL3-no-EL2 squashing during registration.
---
target/arm/helper.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 72d05070f0..7b31c71980 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7246,11 +7246,14 @@ static const ARMCPRegInfo jazelle_regs[] = {
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
};
+static const ARMCPRegInfo contextidr_el2 = {
+ .name = "CONTEXTIDR_EL2", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 1,
+ .access = PL2_RW,
+ .fieldoffset = offsetof(CPUARMState, cp15.contextidr_el[2])
+};
+
static const ARMCPRegInfo vhe_reginfo[] = {
- { .name = "CONTEXTIDR_EL2", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 1,
- .access = PL2_RW,
- .fieldoffset = offsetof(CPUARMState, cp15.contextidr_el[2]) },
{ .name = "TTBR1_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 1,
.access = PL2_RW, .writefn = vmsa_tcr_ttbr_el2_write,
@@ -8215,6 +8218,10 @@ void register_cp_regs_for_features(ARMCPU *cpu)
define_one_arm_cp_reg(cpu, &ssbs_reginfo);
}
+ if (cpu_isar_feature(aa64_vh, cpu) ||
+ cpu_isar_feature(aa64_debugv8p2, cpu)) {
+ define_one_arm_cp_reg(cpu, &contextidr_el2);
+ }
if (arm_feature(env, ARM_FEATURE_EL2) && cpu_isar_feature(aa64_vh, cpu)) {
define_arm_cp_regs(cpu, vhe_reginfo);
}
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 05/24] target/arm: Move cortex impdef sysregs to cpu_tcg.c
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (3 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 04/24] target/arm: Adjust definition of CONTEXTIDR_EL2 Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 06/24] target/arm: Update qemu-system-arm -cpu max to cortex-a57 Richard Henderson
` (18 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Previously we were defining some of these in user-only mode,
but none of them are accessible from user-only, therefore
define them only in system mode.
This will shortly be used from cpu_tcg.c also.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: New patch.
---
target/arm/internals.h | 6 ++++
target/arm/cpu64.c | 64 +++---------------------------------------
target/arm/cpu_tcg.c | 59 ++++++++++++++++++++++++++++++++++++++
3 files changed, 69 insertions(+), 60 deletions(-)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index 255833479d..343b465d51 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1307,4 +1307,10 @@ int aarch64_fpu_gdb_get_reg(CPUARMState *env, GByteArray *buf, int reg);
int aarch64_fpu_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg);
#endif
+#ifdef CONFIG_USER_ONLY
+static inline void define_cortex_a72_a57_a53_cp_reginfo(ARMCPU *cpu) { }
+#else
+void define_cortex_a72_a57_a53_cp_reginfo(ARMCPU *cpu);
+#endif
+
#endif
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index c841d55d0e..33a0a71900 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -34,65 +34,9 @@
#include "hvf_arm.h"
#include "qapi/visitor.h"
#include "hw/qdev-properties.h"
-#include "cpregs.h"
+#include "internals.h"
-#ifndef CONFIG_USER_ONLY
-static uint64_t a57_a53_l2ctlr_read(CPUARMState *env, const ARMCPRegInfo *ri)
-{
- ARMCPU *cpu = env_archcpu(env);
-
- /* Number of cores is in [25:24]; otherwise we RAZ */
- return (cpu->core_count - 1) << 24;
-}
-#endif
-
-static const ARMCPRegInfo cortex_a72_a57_a53_cp_reginfo[] = {
-#ifndef CONFIG_USER_ONLY
- { .name = "L2CTLR_EL1", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 1, .crn = 11, .crm = 0, .opc2 = 2,
- .access = PL1_RW, .readfn = a57_a53_l2ctlr_read,
- .writefn = arm_cp_write_ignore },
- { .name = "L2CTLR",
- .cp = 15, .opc1 = 1, .crn = 9, .crm = 0, .opc2 = 2,
- .access = PL1_RW, .readfn = a57_a53_l2ctlr_read,
- .writefn = arm_cp_write_ignore },
-#endif
- { .name = "L2ECTLR_EL1", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 1, .crn = 11, .crm = 0, .opc2 = 3,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "L2ECTLR",
- .cp = 15, .opc1 = 1, .crn = 9, .crm = 0, .opc2 = 3,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "L2ACTLR", .state = ARM_CP_STATE_BOTH,
- .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 0, .opc2 = 0,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CPUACTLR_EL1", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 0,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CPUACTLR",
- .cp = 15, .opc1 = 0, .crm = 15,
- .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
- { .name = "CPUECTLR_EL1", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 1,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CPUECTLR",
- .cp = 15, .opc1 = 1, .crm = 15,
- .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
- { .name = "CPUMERRSR_EL1", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 2,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "CPUMERRSR",
- .cp = 15, .opc1 = 2, .crm = 15,
- .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
- { .name = "L2MERRSR_EL1", .state = ARM_CP_STATE_AA64,
- .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 3,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
- { .name = "L2MERRSR",
- .cp = 15, .opc1 = 3, .crm = 15,
- .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
-};
-
static void aarch64_a57_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
@@ -143,7 +87,7 @@ static void aarch64_a57_initfn(Object *obj)
cpu->gic_num_lrs = 4;
cpu->gic_vpribits = 5;
cpu->gic_vprebits = 5;
- define_arm_cp_regs(cpu, cortex_a72_a57_a53_cp_reginfo);
+ define_cortex_a72_a57_a53_cp_reginfo(cpu);
}
static void aarch64_a53_initfn(Object *obj)
@@ -196,7 +140,7 @@ static void aarch64_a53_initfn(Object *obj)
cpu->gic_num_lrs = 4;
cpu->gic_vpribits = 5;
cpu->gic_vprebits = 5;
- define_arm_cp_regs(cpu, cortex_a72_a57_a53_cp_reginfo);
+ define_cortex_a72_a57_a53_cp_reginfo(cpu);
}
static void aarch64_a72_initfn(Object *obj)
@@ -247,7 +191,7 @@ static void aarch64_a72_initfn(Object *obj)
cpu->gic_num_lrs = 4;
cpu->gic_vpribits = 5;
cpu->gic_vprebits = 5;
- define_arm_cp_regs(cpu, cortex_a72_a57_a53_cp_reginfo);
+ define_cortex_a72_a57_a53_cp_reginfo(cpu);
}
void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp)
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index 9338088b22..d078f06931 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -20,6 +20,65 @@
#endif
#include "cpregs.h"
+#ifndef CONFIG_USER_ONLY
+static uint64_t l2ctlr_read(CPUARMState *env, const ARMCPRegInfo *ri)
+{
+ ARMCPU *cpu = env_archcpu(env);
+
+ /* Number of cores is in [25:24]; otherwise we RAZ */
+ return (cpu->core_count - 1) << 24;
+}
+
+static const ARMCPRegInfo cortex_a72_a57_a53_cp_reginfo[] = {
+ { .name = "L2CTLR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 1, .crn = 11, .crm = 0, .opc2 = 2,
+ .access = PL1_RW, .readfn = l2ctlr_read,
+ .writefn = arm_cp_write_ignore },
+ { .name = "L2CTLR",
+ .cp = 15, .opc1 = 1, .crn = 9, .crm = 0, .opc2 = 2,
+ .access = PL1_RW, .readfn = l2ctlr_read,
+ .writefn = arm_cp_write_ignore },
+ { .name = "L2ECTLR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 1, .crn = 11, .crm = 0, .opc2 = 3,
+ .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "L2ECTLR",
+ .cp = 15, .opc1 = 1, .crn = 9, .crm = 0, .opc2 = 3,
+ .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "L2ACTLR", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 0, .opc2 = 0,
+ .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "CPUACTLR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 0,
+ .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "CPUACTLR",
+ .cp = 15, .opc1 = 0, .crm = 15,
+ .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
+ { .name = "CPUECTLR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 1,
+ .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "CPUECTLR",
+ .cp = 15, .opc1 = 1, .crm = 15,
+ .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
+ { .name = "CPUMERRSR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 2,
+ .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "CPUMERRSR",
+ .cp = 15, .opc1 = 2, .crm = 15,
+ .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
+ { .name = "L2MERRSR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 2, .opc2 = 3,
+ .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "L2MERRSR",
+ .cp = 15, .opc1 = 3, .crm = 15,
+ .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 },
+};
+
+void define_cortex_a72_a57_a53_cp_reginfo(ARMCPU *cpu)
+{
+ define_arm_cp_regs(cpu, cortex_a72_a57_a53_cp_reginfo);
+}
+#endif /* !CONFIG_USER_ONLY */
+
/* CPU models. These are not needed for the AArch64 linux-user build. */
#if !defined(CONFIG_USER_ONLY) || !defined(TARGET_AARCH64)
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 06/24] target/arm: Update qemu-system-arm -cpu max to cortex-a57
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (4 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 05/24] target/arm: Move cortex impdef sysregs to cpu_tcg.c Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 07/24] target/arm: Set ID_DFR0.PerfMon for qemu-system-arm -cpu max Richard Henderson
` (17 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Instead of starting with cortex-a15 and adding v8 features to
a v7 cpu, begin with a v8 cpu stripped of its aarch64 features.
This fixes the long-standing to-do where we only enabled v8
features for user-only.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Create impdef sysregs; only enable short-vector support for user-only.
---
target/arm/cpu_tcg.c | 151 ++++++++++++++++++++++++++-----------------
1 file changed, 92 insertions(+), 59 deletions(-)
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index d078f06931..f9094c1752 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -994,71 +994,104 @@ static void arm_v7m_class_init(ObjectClass *oc, void *data)
static void arm_max_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
+ uint32_t t;
- cortex_a15_initfn(obj);
+ /* aarch64_a57_initfn, advertising none of the aarch64 features */
+ cpu->dtb_compatible = "arm,cortex-a57";
+ set_feature(&cpu->env, ARM_FEATURE_V8);
+ set_feature(&cpu->env, ARM_FEATURE_NEON);
+ set_feature(&cpu->env, ARM_FEATURE_GENERIC_TIMER);
+ set_feature(&cpu->env, ARM_FEATURE_CBAR_RO);
+ set_feature(&cpu->env, ARM_FEATURE_EL2);
+ set_feature(&cpu->env, ARM_FEATURE_EL3);
+ set_feature(&cpu->env, ARM_FEATURE_PMU);
+ cpu->midr = 0x411fd070;
+ cpu->revidr = 0x00000000;
+ cpu->reset_fpsid = 0x41034070;
+ cpu->isar.mvfr0 = 0x10110222;
+ cpu->isar.mvfr1 = 0x12111111;
+ cpu->isar.mvfr2 = 0x00000043;
+ cpu->ctr = 0x8444c004;
+ cpu->reset_sctlr = 0x00c50838;
+ cpu->isar.id_pfr0 = 0x00000131;
+ cpu->isar.id_pfr1 = 0x00011011;
+ cpu->isar.id_dfr0 = 0x03010066;
+ cpu->id_afr0 = 0x00000000;
+ cpu->isar.id_mmfr0 = 0x10101105;
+ cpu->isar.id_mmfr1 = 0x40000000;
+ cpu->isar.id_mmfr2 = 0x01260000;
+ cpu->isar.id_mmfr3 = 0x02102211;
+ cpu->isar.id_isar0 = 0x02101110;
+ cpu->isar.id_isar1 = 0x13112111;
+ cpu->isar.id_isar2 = 0x21232042;
+ cpu->isar.id_isar3 = 0x01112131;
+ cpu->isar.id_isar4 = 0x00011142;
+ cpu->isar.id_isar5 = 0x00011121;
+ cpu->isar.id_isar6 = 0;
+ cpu->isar.dbgdidr = 0x3516d000;
+ cpu->clidr = 0x0a200023;
+ cpu->ccsidr[0] = 0x701fe00a; /* 32KB L1 dcache */
+ cpu->ccsidr[1] = 0x201fe012; /* 48KB L1 icache */
+ cpu->ccsidr[2] = 0x70ffe07a; /* 2048KB L2 cache */
+ define_cortex_a72_a57_a53_cp_reginfo(cpu);
- /* old-style VFP short-vector support */
- cpu->isar.mvfr0 = FIELD_DP32(cpu->isar.mvfr0, MVFR0, FPSHVEC, 1);
+ /* Add additional features supported by QEMU */
+ t = cpu->isar.id_isar5;
+ t = FIELD_DP32(t, ID_ISAR5, AES, 2);
+ t = FIELD_DP32(t, ID_ISAR5, SHA1, 1);
+ t = FIELD_DP32(t, ID_ISAR5, SHA2, 1);
+ t = FIELD_DP32(t, ID_ISAR5, CRC32, 1);
+ t = FIELD_DP32(t, ID_ISAR5, RDM, 1);
+ t = FIELD_DP32(t, ID_ISAR5, VCMA, 1);
+ cpu->isar.id_isar5 = t;
+
+ t = cpu->isar.id_isar6;
+ t = FIELD_DP32(t, ID_ISAR6, JSCVT, 1);
+ t = FIELD_DP32(t, ID_ISAR6, DP, 1);
+ t = FIELD_DP32(t, ID_ISAR6, FHM, 1);
+ t = FIELD_DP32(t, ID_ISAR6, SB, 1);
+ t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1);
+ t = FIELD_DP32(t, ID_ISAR6, BF16, 1);
+ t = FIELD_DP32(t, ID_ISAR6, I8MM, 1);
+ cpu->isar.id_isar6 = t;
+
+ t = cpu->isar.mvfr1;
+ t = FIELD_DP32(t, MVFR1, FPHP, 3); /* v8.2-FP16 */
+ t = FIELD_DP32(t, MVFR1, SIMDHP, 2); /* v8.2-FP16 */
+ cpu->isar.mvfr1 = t;
+
+ t = cpu->isar.mvfr2;
+ t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
+ t = FIELD_DP32(t, MVFR2, FPMISC, 4); /* FP MaxNum */
+ cpu->isar.mvfr2 = t;
+
+ t = cpu->isar.id_mmfr3;
+ t = FIELD_DP32(t, ID_MMFR3, PAN, 2); /* ATS1E1 */
+ cpu->isar.id_mmfr3 = t;
+
+ t = cpu->isar.id_mmfr4;
+ t = FIELD_DP32(t, ID_MMFR4, HPDS, 1); /* AA32HPD */
+ t = FIELD_DP32(t, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */
+ 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;
+
+ t = cpu->isar.id_pfr2;
+ t = FIELD_DP32(t, ID_PFR2, SSBS, 1);
+ cpu->isar.id_pfr2 = t;
#ifdef CONFIG_USER_ONLY
/*
- * We don't set these in system emulation mode for the moment,
- * since we don't correctly set (all of) the ID registers to
- * advertise them.
+ * Break with true ARMv8 and add back old-style VFP short-vector support.
+ * Only do this for user-mode, where -cpu max is the default, so that
+ * older v6 and v7 programs are more likely to work without adjustment.
*/
- set_feature(&cpu->env, ARM_FEATURE_V8);
- {
- uint32_t t;
-
- t = cpu->isar.id_isar5;
- t = FIELD_DP32(t, ID_ISAR5, AES, 2);
- t = FIELD_DP32(t, ID_ISAR5, SHA1, 1);
- t = FIELD_DP32(t, ID_ISAR5, SHA2, 1);
- t = FIELD_DP32(t, ID_ISAR5, CRC32, 1);
- t = FIELD_DP32(t, ID_ISAR5, RDM, 1);
- t = FIELD_DP32(t, ID_ISAR5, VCMA, 1);
- cpu->isar.id_isar5 = t;
-
- t = cpu->isar.id_isar6;
- t = FIELD_DP32(t, ID_ISAR6, JSCVT, 1);
- t = FIELD_DP32(t, ID_ISAR6, DP, 1);
- t = FIELD_DP32(t, ID_ISAR6, FHM, 1);
- t = FIELD_DP32(t, ID_ISAR6, SB, 1);
- t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1);
- t = FIELD_DP32(t, ID_ISAR6, BF16, 1);
- t = FIELD_DP32(t, ID_ISAR6, I8MM, 1);
- cpu->isar.id_isar6 = t;
-
- t = cpu->isar.mvfr1;
- t = FIELD_DP32(t, MVFR1, FPHP, 3); /* v8.2-FP16 */
- t = FIELD_DP32(t, MVFR1, SIMDHP, 2); /* v8.2-FP16 */
- cpu->isar.mvfr1 = t;
-
- t = cpu->isar.mvfr2;
- t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
- t = FIELD_DP32(t, MVFR2, FPMISC, 4); /* FP MaxNum */
- cpu->isar.mvfr2 = t;
-
- t = cpu->isar.id_mmfr3;
- t = FIELD_DP32(t, ID_MMFR3, PAN, 2); /* ATS1E1 */
- cpu->isar.id_mmfr3 = t;
-
- t = cpu->isar.id_mmfr4;
- t = FIELD_DP32(t, ID_MMFR4, HPDS, 1); /* AA32HPD */
- t = FIELD_DP32(t, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */
- 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;
-
- t = cpu->isar.id_pfr2;
- t = FIELD_DP32(t, ID_PFR2, SSBS, 1);
- cpu->isar.id_pfr2 = t;
- }
-#endif /* CONFIG_USER_ONLY */
+ cpu->isar.mvfr0 = FIELD_DP32(cpu->isar.mvfr0, MVFR0, FPSHVEC, 1);
+#endif
}
#endif /* !TARGET_AARCH64 */
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 07/24] target/arm: Set ID_DFR0.PerfMon for qemu-system-arm -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (5 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 06/24] target/arm: Update qemu-system-arm -cpu max to cortex-a57 Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 08/24] target/arm: Split out aa32_max_features Richard Henderson
` (16 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
We set this for qemu-system-aarch64, but failed to do so
for the strictly 32-bit emulation.
Fixes: 3bec78447a9 ("target/arm: Provide ARMv8.4-PMU in '-cpu max'")
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu_tcg.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index f9094c1752..9aa2f737c1 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -1084,6 +1084,10 @@ static void arm_max_initfn(Object *obj)
t = FIELD_DP32(t, ID_PFR2, SSBS, 1);
cpu->isar.id_pfr2 = t;
+ t = cpu->isar.id_dfr0;
+ t = FIELD_DP32(t, ID_DFR0, PERFMON, 5); /* v8.4-PMU */
+ cpu->isar.id_dfr0 = t;
+
#ifdef CONFIG_USER_ONLY
/*
* Break with true ARMv8 and add back old-style VFP short-vector support.
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 08/24] target/arm: Split out aa32_max_features
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (6 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 07/24] target/arm: Set ID_DFR0.PerfMon for qemu-system-arm -cpu max Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 09/24] target/arm: Annotate arm_max_initfn with FEAT identifiers Richard Henderson
` (15 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Share the code to set AArch32 max features so that we no
longer have code drift between qemu{-system,}-{arm,aarch64}.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/internals.h | 2 +
target/arm/cpu64.c | 50 +-----------------
target/arm/cpu_tcg.c | 114 ++++++++++++++++++++++-------------------
3 files changed, 65 insertions(+), 101 deletions(-)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index 343b465d51..c563b3735f 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1313,4 +1313,6 @@ static inline void define_cortex_a72_a57_a53_cp_reginfo(ARMCPU *cpu) { }
void define_cortex_a72_a57_a53_cp_reginfo(ARMCPU *cpu);
#endif
+void aa32_max_features(ARMCPU *cpu);
+
#endif
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 33a0a71900..6da42af56e 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -682,7 +682,6 @@ static void aarch64_max_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
uint64_t t;
- uint32_t u;
if (kvm_enabled() || hvf_enabled()) {
/* With KVM or HVF, '-cpu max' is identical to '-cpu host' */
@@ -799,57 +798,12 @@ static void aarch64_max_initfn(Object *obj)
t = FIELD_DP64(t, ID_AA64ZFR0, F64MM, 1);
cpu->isar.id_aa64zfr0 = t;
- /* Replicate the same data to the 32-bit id registers. */
- u = cpu->isar.id_isar5;
- u = FIELD_DP32(u, ID_ISAR5, AES, 2); /* AES + PMULL */
- u = FIELD_DP32(u, ID_ISAR5, SHA1, 1);
- u = FIELD_DP32(u, ID_ISAR5, SHA2, 1);
- u = FIELD_DP32(u, ID_ISAR5, CRC32, 1);
- u = FIELD_DP32(u, ID_ISAR5, RDM, 1);
- u = FIELD_DP32(u, ID_ISAR5, VCMA, 1);
- cpu->isar.id_isar5 = u;
-
- u = cpu->isar.id_isar6;
- u = FIELD_DP32(u, ID_ISAR6, JSCVT, 1);
- u = FIELD_DP32(u, ID_ISAR6, DP, 1);
- u = FIELD_DP32(u, ID_ISAR6, FHM, 1);
- u = FIELD_DP32(u, ID_ISAR6, SB, 1);
- u = FIELD_DP32(u, ID_ISAR6, SPECRES, 1);
- u = FIELD_DP32(u, ID_ISAR6, BF16, 1);
- u = FIELD_DP32(u, ID_ISAR6, I8MM, 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_pfr2;
- u = FIELD_DP32(u, ID_PFR2, SSBS, 1);
- cpu->isar.id_pfr2 = u;
-
- u = cpu->isar.id_mmfr3;
- u = FIELD_DP32(u, ID_MMFR3, PAN, 2); /* ATS1E1 */
- cpu->isar.id_mmfr3 = u;
-
- u = cpu->isar.id_mmfr4;
- u = FIELD_DP32(u, ID_MMFR4, HPDS, 1); /* AA32HPD */
- u = FIELD_DP32(u, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */
- u = FIELD_DP32(u, ID_MMFR4, CNP, 1); /* TTCNP */
- u = FIELD_DP32(u, ID_MMFR4, XNX, 1); /* TTS2UXN */
- cpu->isar.id_mmfr4 = u;
-
t = cpu->isar.id_aa64dfr0;
t = FIELD_DP64(t, ID_AA64DFR0, PMUVER, 5); /* v8.4-PMU */
cpu->isar.id_aa64dfr0 = t;
- u = cpu->isar.id_dfr0;
- u = FIELD_DP32(u, ID_DFR0, PERFMON, 5); /* v8.4-PMU */
- cpu->isar.id_dfr0 = u;
-
- u = cpu->isar.mvfr1;
- u = FIELD_DP32(u, MVFR1, FPHP, 3); /* v8.2-FP16 */
- u = FIELD_DP32(u, MVFR1, SIMDHP, 2); /* v8.2-FP16 */
- cpu->isar.mvfr1 = u;
+ /* Replicate the same data to the 32-bit id registers. */
+ aa32_max_features(cpu);
#ifdef CONFIG_USER_ONLY
/*
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index 9aa2f737c1..b0dbf2c991 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -20,6 +20,66 @@
#endif
#include "cpregs.h"
+
+/* Share AArch32 -cpu max features with AArch64. */
+void aa32_max_features(ARMCPU *cpu)
+{
+ uint32_t t;
+
+ /* Add additional features supported by QEMU */
+ t = cpu->isar.id_isar5;
+ t = FIELD_DP32(t, ID_ISAR5, AES, 2);
+ t = FIELD_DP32(t, ID_ISAR5, SHA1, 1);
+ t = FIELD_DP32(t, ID_ISAR5, SHA2, 1);
+ t = FIELD_DP32(t, ID_ISAR5, CRC32, 1);
+ t = FIELD_DP32(t, ID_ISAR5, RDM, 1);
+ t = FIELD_DP32(t, ID_ISAR5, VCMA, 1);
+ cpu->isar.id_isar5 = t;
+
+ t = cpu->isar.id_isar6;
+ t = FIELD_DP32(t, ID_ISAR6, JSCVT, 1);
+ t = FIELD_DP32(t, ID_ISAR6, DP, 1);
+ t = FIELD_DP32(t, ID_ISAR6, FHM, 1);
+ t = FIELD_DP32(t, ID_ISAR6, SB, 1);
+ t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1);
+ t = FIELD_DP32(t, ID_ISAR6, BF16, 1);
+ t = FIELD_DP32(t, ID_ISAR6, I8MM, 1);
+ cpu->isar.id_isar6 = t;
+
+ t = cpu->isar.mvfr1;
+ t = FIELD_DP32(t, MVFR1, FPHP, 3); /* v8.2-FP16 */
+ t = FIELD_DP32(t, MVFR1, SIMDHP, 2); /* v8.2-FP16 */
+ cpu->isar.mvfr1 = t;
+
+ t = cpu->isar.mvfr2;
+ t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
+ t = FIELD_DP32(t, MVFR2, FPMISC, 4); /* FP MaxNum */
+ cpu->isar.mvfr2 = t;
+
+ t = cpu->isar.id_mmfr3;
+ t = FIELD_DP32(t, ID_MMFR3, PAN, 2); /* ATS1E1 */
+ cpu->isar.id_mmfr3 = t;
+
+ t = cpu->isar.id_mmfr4;
+ t = FIELD_DP32(t, ID_MMFR4, HPDS, 1); /* AA32HPD */
+ t = FIELD_DP32(t, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */
+ 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;
+
+ t = cpu->isar.id_pfr2;
+ t = FIELD_DP32(t, ID_PFR2, SSBS, 1);
+ cpu->isar.id_pfr2 = t;
+
+ t = cpu->isar.id_dfr0;
+ t = FIELD_DP32(t, ID_DFR0, PERFMON, 5); /* v8.4-PMU */
+ cpu->isar.id_dfr0 = t;
+}
+
#ifndef CONFIG_USER_ONLY
static uint64_t l2ctlr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
@@ -994,7 +1054,6 @@ static void arm_v7m_class_init(ObjectClass *oc, void *data)
static void arm_max_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
- uint32_t t;
/* aarch64_a57_initfn, advertising none of the aarch64 features */
cpu->dtb_compatible = "arm,cortex-a57";
@@ -1035,58 +1094,7 @@ static void arm_max_initfn(Object *obj)
cpu->ccsidr[2] = 0x70ffe07a; /* 2048KB L2 cache */
define_cortex_a72_a57_a53_cp_reginfo(cpu);
- /* Add additional features supported by QEMU */
- t = cpu->isar.id_isar5;
- t = FIELD_DP32(t, ID_ISAR5, AES, 2);
- t = FIELD_DP32(t, ID_ISAR5, SHA1, 1);
- t = FIELD_DP32(t, ID_ISAR5, SHA2, 1);
- t = FIELD_DP32(t, ID_ISAR5, CRC32, 1);
- t = FIELD_DP32(t, ID_ISAR5, RDM, 1);
- t = FIELD_DP32(t, ID_ISAR5, VCMA, 1);
- cpu->isar.id_isar5 = t;
-
- t = cpu->isar.id_isar6;
- t = FIELD_DP32(t, ID_ISAR6, JSCVT, 1);
- t = FIELD_DP32(t, ID_ISAR6, DP, 1);
- t = FIELD_DP32(t, ID_ISAR6, FHM, 1);
- t = FIELD_DP32(t, ID_ISAR6, SB, 1);
- t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1);
- t = FIELD_DP32(t, ID_ISAR6, BF16, 1);
- t = FIELD_DP32(t, ID_ISAR6, I8MM, 1);
- cpu->isar.id_isar6 = t;
-
- t = cpu->isar.mvfr1;
- t = FIELD_DP32(t, MVFR1, FPHP, 3); /* v8.2-FP16 */
- t = FIELD_DP32(t, MVFR1, SIMDHP, 2); /* v8.2-FP16 */
- cpu->isar.mvfr1 = t;
-
- t = cpu->isar.mvfr2;
- t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
- t = FIELD_DP32(t, MVFR2, FPMISC, 4); /* FP MaxNum */
- cpu->isar.mvfr2 = t;
-
- t = cpu->isar.id_mmfr3;
- t = FIELD_DP32(t, ID_MMFR3, PAN, 2); /* ATS1E1 */
- cpu->isar.id_mmfr3 = t;
-
- t = cpu->isar.id_mmfr4;
- t = FIELD_DP32(t, ID_MMFR4, HPDS, 1); /* AA32HPD */
- t = FIELD_DP32(t, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */
- 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;
-
- t = cpu->isar.id_pfr2;
- t = FIELD_DP32(t, ID_PFR2, SSBS, 1);
- cpu->isar.id_pfr2 = t;
-
- t = cpu->isar.id_dfr0;
- t = FIELD_DP32(t, ID_DFR0, PERFMON, 5); /* v8.4-PMU */
- cpu->isar.id_dfr0 = t;
+ aa32_max_features(cpu);
#ifdef CONFIG_USER_ONLY
/*
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 09/24] target/arm: Annotate arm_max_initfn with FEAT identifiers
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (7 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 08/24] target/arm: Split out aa32_max_features Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 10/24] target/arm: Use field names for manipulating EL2 and EL3 modes Richard Henderson
` (14 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Update the legacy feature names to the current names.
Provide feature names for id changes that were not marked.
Sort the field updates into increasing bitfield order.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu64.c | 100 +++++++++++++++++++++----------------------
target/arm/cpu_tcg.c | 48 ++++++++++-----------
2 files changed, 74 insertions(+), 74 deletions(-)
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 6da42af56e..5fce40a6bc 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -713,51 +713,51 @@ static void aarch64_max_initfn(Object *obj)
cpu->midr = t;
t = cpu->isar.id_aa64isar0;
- t = FIELD_DP64(t, ID_AA64ISAR0, AES, 2); /* AES + PMULL */
- t = FIELD_DP64(t, ID_AA64ISAR0, SHA1, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, SHA2, 2); /* SHA512 */
+ t = FIELD_DP64(t, ID_AA64ISAR0, AES, 2); /* FEAT_PMULL */
+ t = FIELD_DP64(t, ID_AA64ISAR0, SHA1, 1); /* FEAT_SHA1 */
+ t = FIELD_DP64(t, ID_AA64ISAR0, SHA2, 2); /* FEAT_SHA512 */
t = FIELD_DP64(t, ID_AA64ISAR0, CRC32, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, ATOMIC, 2);
- t = FIELD_DP64(t, ID_AA64ISAR0, RDM, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, SHA3, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, SM3, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, SM4, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, DP, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, FHM, 1);
- t = FIELD_DP64(t, ID_AA64ISAR0, TS, 2); /* v8.5-CondM */
- t = FIELD_DP64(t, ID_AA64ISAR0, TLB, 2); /* FEAT_TLBIRANGE */
- t = FIELD_DP64(t, ID_AA64ISAR0, RNDR, 1);
+ t = FIELD_DP64(t, ID_AA64ISAR0, ATOMIC, 2); /* FEAT_LSE */
+ t = FIELD_DP64(t, ID_AA64ISAR0, RDM, 1); /* FEAT_RDM */
+ t = FIELD_DP64(t, ID_AA64ISAR0, SHA3, 1); /* FEAT_SHA3 */
+ t = FIELD_DP64(t, ID_AA64ISAR0, SM3, 1); /* FEAT_SM3 */
+ t = FIELD_DP64(t, ID_AA64ISAR0, SM4, 1); /* FEAT_SM4 */
+ t = FIELD_DP64(t, ID_AA64ISAR0, DP, 1); /* FEAT_DotProd */
+ t = FIELD_DP64(t, ID_AA64ISAR0, FHM, 1); /* FEAT_FHM */
+ t = FIELD_DP64(t, ID_AA64ISAR0, TS, 2); /* FEAT_FlagM2 */
+ t = FIELD_DP64(t, ID_AA64ISAR0, TLB, 2); /* FEAT_TLBIRANGE */
+ t = FIELD_DP64(t, ID_AA64ISAR0, RNDR, 1); /* FEAT_RNG */
cpu->isar.id_aa64isar0 = t;
t = cpu->isar.id_aa64isar1;
- t = FIELD_DP64(t, ID_AA64ISAR1, DPB, 2);
- t = FIELD_DP64(t, ID_AA64ISAR1, JSCVT, 1);
- t = FIELD_DP64(t, ID_AA64ISAR1, FCMA, 1);
- t = FIELD_DP64(t, ID_AA64ISAR1, SB, 1);
- t = FIELD_DP64(t, ID_AA64ISAR1, SPECRES, 1);
- t = FIELD_DP64(t, ID_AA64ISAR1, BF16, 1);
- t = FIELD_DP64(t, ID_AA64ISAR1, FRINTTS, 1);
- t = FIELD_DP64(t, ID_AA64ISAR1, LRCPC, 2); /* ARMv8.4-RCPC */
- t = FIELD_DP64(t, ID_AA64ISAR1, I8MM, 1);
+ t = FIELD_DP64(t, ID_AA64ISAR1, DPB, 2); /* FEAT_DPB2 */
+ t = FIELD_DP64(t, ID_AA64ISAR1, JSCVT, 1); /* FEAT_JSCVT */
+ t = FIELD_DP64(t, ID_AA64ISAR1, FCMA, 1); /* FEAT_FCMA */
+ t = FIELD_DP64(t, ID_AA64ISAR1, LRCPC, 2); /* FEAT_LRCPC2 */
+ t = FIELD_DP64(t, ID_AA64ISAR1, FRINTTS, 1); /* FEAT_FRINTTS */
+ t = FIELD_DP64(t, ID_AA64ISAR1, SB, 1); /* FEAT_SB */
+ t = FIELD_DP64(t, ID_AA64ISAR1, SPECRES, 1); /* FEAT_SPECRES */
+ t = FIELD_DP64(t, ID_AA64ISAR1, BF16, 1); /* FEAT_BF16 */
+ t = FIELD_DP64(t, ID_AA64ISAR1, I8MM, 1); /* FEAT_I8MM */
cpu->isar.id_aa64isar1 = t;
t = cpu->isar.id_aa64pfr0;
+ t = FIELD_DP64(t, ID_AA64PFR0, FP, 1); /* FEAT_FP16 */
+ t = FIELD_DP64(t, ID_AA64PFR0, ADVSIMD, 1); /* FEAT_FP16 */
t = FIELD_DP64(t, ID_AA64PFR0, SVE, 1);
- 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);
+ t = FIELD_DP64(t, ID_AA64PFR0, SEL2, 1); /* FEAT_SEL2 */
+ t = FIELD_DP64(t, ID_AA64PFR0, DIT, 1); /* FEAT_DIT */
cpu->isar.id_aa64pfr0 = t;
t = cpu->isar.id_aa64pfr1;
- t = FIELD_DP64(t, ID_AA64PFR1, BT, 1);
- t = FIELD_DP64(t, ID_AA64PFR1, SSBS, 2);
+ t = FIELD_DP64(t, ID_AA64PFR1, BT, 1); /* FEAT_BTI */
+ t = FIELD_DP64(t, ID_AA64PFR1, SSBS, 2); /* FEAT_SSBS2 */
/*
* Begin with full support for MTE. This will be downgraded to MTE=0
* during realize if the board provides no tag memory, much like
* we do for EL2 with the virtualization=on property.
*/
- t = FIELD_DP64(t, ID_AA64PFR1, MTE, 3);
+ t = FIELD_DP64(t, ID_AA64PFR1, MTE, 3); /* FEAT_MTE3 */
cpu->isar.id_aa64pfr1 = t;
t = cpu->isar.id_aa64mmfr0;
@@ -769,37 +769,37 @@ static void aarch64_max_initfn(Object *obj)
cpu->isar.id_aa64mmfr0 = t;
t = cpu->isar.id_aa64mmfr1;
- t = FIELD_DP64(t, ID_AA64MMFR1, HPDS, 1); /* HPD */
- t = FIELD_DP64(t, ID_AA64MMFR1, LO, 1);
- t = FIELD_DP64(t, ID_AA64MMFR1, VH, 1);
- t = FIELD_DP64(t, ID_AA64MMFR1, PAN, 2); /* ATS1E1 */
- t = FIELD_DP64(t, ID_AA64MMFR1, VMIDBITS, 2); /* VMID16 */
- t = FIELD_DP64(t, ID_AA64MMFR1, XNX, 1); /* TTS2UXN */
+ t = FIELD_DP64(t, ID_AA64MMFR1, VMIDBITS, 2); /* FEAT_VMID16 */
+ t = FIELD_DP64(t, ID_AA64MMFR1, VH, 1); /* FEAT_VHE */
+ t = FIELD_DP64(t, ID_AA64MMFR1, HPDS, 1); /* FEAT_HPDS */
+ t = FIELD_DP64(t, ID_AA64MMFR1, LO, 1); /* FEAT_LOR */
+ t = FIELD_DP64(t, ID_AA64MMFR1, PAN, 2); /* FEAT_PAN2 */
+ t = FIELD_DP64(t, ID_AA64MMFR1, XNX, 1); /* FEAT_XNX */
cpu->isar.id_aa64mmfr1 = t;
t = cpu->isar.id_aa64mmfr2;
- t = FIELD_DP64(t, ID_AA64MMFR2, UAO, 1);
- t = FIELD_DP64(t, ID_AA64MMFR2, CNP, 1); /* TTCNP */
- t = FIELD_DP64(t, ID_AA64MMFR2, ST, 1); /* TTST */
- t = FIELD_DP64(t, ID_AA64MMFR2, VARANGE, 1); /* FEAT_LVA */
- t = FIELD_DP64(t, ID_AA64MMFR2, TTL, 1); /* FEAT_TTL */
- t = FIELD_DP64(t, ID_AA64MMFR2, BBM, 2); /* FEAT_BBM at level 2 */
+ t = FIELD_DP64(t, ID_AA64MMFR2, CNP, 1); /* FEAT_TTCNP */
+ t = FIELD_DP64(t, ID_AA64MMFR2, UAO, 1); /* FEAT_UAO */
+ t = FIELD_DP64(t, ID_AA64MMFR2, VARANGE, 1); /* FEAT_LVA */
+ t = FIELD_DP64(t, ID_AA64MMFR2, ST, 1); /* FEAT_TTST */
+ t = FIELD_DP64(t, ID_AA64MMFR2, TTL, 1); /* FEAT_TTL */
+ t = FIELD_DP64(t, ID_AA64MMFR2, BBM, 2); /* FEAT_BBM at level 2 */
cpu->isar.id_aa64mmfr2 = t;
t = cpu->isar.id_aa64zfr0;
t = FIELD_DP64(t, ID_AA64ZFR0, SVEVER, 1);
- t = FIELD_DP64(t, ID_AA64ZFR0, AES, 2); /* PMULL */
- t = FIELD_DP64(t, ID_AA64ZFR0, BITPERM, 1);
- t = FIELD_DP64(t, ID_AA64ZFR0, BFLOAT16, 1);
- t = FIELD_DP64(t, ID_AA64ZFR0, SHA3, 1);
- t = FIELD_DP64(t, ID_AA64ZFR0, SM4, 1);
- t = FIELD_DP64(t, ID_AA64ZFR0, I8MM, 1);
- t = FIELD_DP64(t, ID_AA64ZFR0, F32MM, 1);
- t = FIELD_DP64(t, ID_AA64ZFR0, F64MM, 1);
+ t = FIELD_DP64(t, ID_AA64ZFR0, AES, 2); /* FEAT_SVE_PMULL128 */
+ t = FIELD_DP64(t, ID_AA64ZFR0, BITPERM, 1); /* FEAT_SVE_BitPerm */
+ t = FIELD_DP64(t, ID_AA64ZFR0, BFLOAT16, 1); /* FEAT_BF16 */
+ t = FIELD_DP64(t, ID_AA64ZFR0, SHA3, 1); /* FEAT_SVE_SHA3 */
+ t = FIELD_DP64(t, ID_AA64ZFR0, SM4, 1); /* FEAT_SVE_SM4 */
+ t = FIELD_DP64(t, ID_AA64ZFR0, I8MM, 1); /* FEAT_I8MM */
+ t = FIELD_DP64(t, ID_AA64ZFR0, F32MM, 1); /* FEAT_F32MM */
+ t = FIELD_DP64(t, ID_AA64ZFR0, F64MM, 1); /* FEAT_F64MM */
cpu->isar.id_aa64zfr0 = t;
t = cpu->isar.id_aa64dfr0;
- t = FIELD_DP64(t, ID_AA64DFR0, PMUVER, 5); /* v8.4-PMU */
+ t = FIELD_DP64(t, ID_AA64DFR0, PMUVER, 5); /* FEAT_PMUv3p4 */
cpu->isar.id_aa64dfr0 = t;
/* Replicate the same data to the 32-bit id registers. */
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index b0dbf2c991..bc8f9d0edf 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -28,55 +28,55 @@ void aa32_max_features(ARMCPU *cpu)
/* Add additional features supported by QEMU */
t = cpu->isar.id_isar5;
- t = FIELD_DP32(t, ID_ISAR5, AES, 2);
- t = FIELD_DP32(t, ID_ISAR5, SHA1, 1);
- t = FIELD_DP32(t, ID_ISAR5, SHA2, 1);
+ t = FIELD_DP32(t, ID_ISAR5, AES, 2); /* FEAT_PMULL */
+ t = FIELD_DP32(t, ID_ISAR5, SHA1, 1); /* FEAT_SHA1 */
+ t = FIELD_DP32(t, ID_ISAR5, SHA2, 1); /* FEAT_SHA256 */
t = FIELD_DP32(t, ID_ISAR5, CRC32, 1);
- t = FIELD_DP32(t, ID_ISAR5, RDM, 1);
- t = FIELD_DP32(t, ID_ISAR5, VCMA, 1);
+ t = FIELD_DP32(t, ID_ISAR5, RDM, 1); /* FEAT_RDM */
+ t = FIELD_DP32(t, ID_ISAR5, VCMA, 1); /* FEAT_FCMA */
cpu->isar.id_isar5 = t;
t = cpu->isar.id_isar6;
- t = FIELD_DP32(t, ID_ISAR6, JSCVT, 1);
- t = FIELD_DP32(t, ID_ISAR6, DP, 1);
- t = FIELD_DP32(t, ID_ISAR6, FHM, 1);
- t = FIELD_DP32(t, ID_ISAR6, SB, 1);
- t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1);
- t = FIELD_DP32(t, ID_ISAR6, BF16, 1);
- t = FIELD_DP32(t, ID_ISAR6, I8MM, 1);
+ t = FIELD_DP32(t, ID_ISAR6, JSCVT, 1); /* FEAT_JSCVT */
+ t = FIELD_DP32(t, ID_ISAR6, DP, 1); /* Feat_DotProd */
+ t = FIELD_DP32(t, ID_ISAR6, FHM, 1); /* FEAT_FHM */
+ t = FIELD_DP32(t, ID_ISAR6, SB, 1); /* FEAT_SB */
+ t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1); /* FEAT_SPECRES */
+ t = FIELD_DP32(t, ID_ISAR6, BF16, 1); /* FEAT_AA32BF16 */
+ t = FIELD_DP32(t, ID_ISAR6, I8MM, 1); /* FEAT_AA32I8MM */
cpu->isar.id_isar6 = t;
t = cpu->isar.mvfr1;
- t = FIELD_DP32(t, MVFR1, FPHP, 3); /* v8.2-FP16 */
- t = FIELD_DP32(t, MVFR1, SIMDHP, 2); /* v8.2-FP16 */
+ t = FIELD_DP32(t, MVFR1, FPHP, 3); /* FEAT_FP16 */
+ t = FIELD_DP32(t, MVFR1, SIMDHP, 2); /* FEAT_FP16 */
cpu->isar.mvfr1 = t;
t = cpu->isar.mvfr2;
- t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
- t = FIELD_DP32(t, MVFR2, FPMISC, 4); /* FP MaxNum */
+ t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
+ t = FIELD_DP32(t, MVFR2, FPMISC, 4); /* FP MaxNum */
cpu->isar.mvfr2 = t;
t = cpu->isar.id_mmfr3;
- t = FIELD_DP32(t, ID_MMFR3, PAN, 2); /* ATS1E1 */
+ t = FIELD_DP32(t, ID_MMFR3, PAN, 2); /* FEAT_PAN2 */
cpu->isar.id_mmfr3 = t;
t = cpu->isar.id_mmfr4;
- t = FIELD_DP32(t, ID_MMFR4, HPDS, 1); /* AA32HPD */
- t = FIELD_DP32(t, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */
- t = FIELD_DP32(t, ID_MMFR4, CNP, 1); /* TTCNP */
- t = FIELD_DP32(t, ID_MMFR4, XNX, 1); /* TTS2UXN */
+ t = FIELD_DP32(t, ID_MMFR4, HPDS, 1); /* FEAT_AA32HPD */
+ t = FIELD_DP32(t, ID_MMFR4, AC2, 1); /* ACTLR2, HACTLR2 */
+ t = FIELD_DP32(t, ID_MMFR4, CNP, 1); /* FEAT_TTCNP */
+ t = FIELD_DP32(t, ID_MMFR4, XNX, 1); /* FEAT_XNX*/
cpu->isar.id_mmfr4 = t;
t = cpu->isar.id_pfr0;
- t = FIELD_DP32(t, ID_PFR0, DIT, 1);
+ t = FIELD_DP32(t, ID_PFR0, DIT, 1); /* FEAT_DIT */
cpu->isar.id_pfr0 = t;
t = cpu->isar.id_pfr2;
- t = FIELD_DP32(t, ID_PFR2, SSBS, 1);
+ t = FIELD_DP32(t, ID_PFR2, SSBS, 1); /* FEAT_SSBS */
cpu->isar.id_pfr2 = t;
t = cpu->isar.id_dfr0;
- t = FIELD_DP32(t, ID_DFR0, PERFMON, 5); /* v8.4-PMU */
+ t = FIELD_DP32(t, ID_DFR0, PERFMON, 5); /* FEAT_PMUv3p4 */
cpu->isar.id_dfr0 = t;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 10/24] target/arm: Use field names for manipulating EL2 and EL3 modes
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (8 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 09/24] target/arm: Annotate arm_max_initfn with FEAT identifiers Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 11/24] target/arm: Enable FEAT_Debugv8p2 for -cpu max Richard Henderson
` (13 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Use FIELD_DP{32,64} to manipulate id_pfr1 and id_aa64pfr0
during arm_cpu_realizefn.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 01176b2569..7995ff2712 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1801,11 +1801,13 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
*/
unset_feature(env, ARM_FEATURE_EL3);
- /* Disable the security extension feature bits in the processor feature
- * registers as well. These are id_pfr1[7:4] and id_aa64pfr0[15:12].
+ /*
+ * Disable the security extension feature bits in the processor
+ * feature registers as well.
*/
- cpu->isar.id_pfr1 &= ~0xf0;
- cpu->isar.id_aa64pfr0 &= ~0xf000;
+ cpu->isar.id_pfr1 = FIELD_DP32(cpu->isar.id_pfr1, ID_PFR1, SECURITY, 0);
+ cpu->isar.id_aa64pfr0 = FIELD_DP64(cpu->isar.id_aa64pfr0,
+ ID_AA64PFR0, EL3, 0);
}
if (!cpu->has_el2) {
@@ -1836,12 +1838,14 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
}
if (!arm_feature(env, ARM_FEATURE_EL2)) {
- /* Disable the hypervisor feature bits in the processor feature
- * registers if we don't have EL2. These are id_pfr1[15:12] and
- * id_aa64pfr0_el1[11:8].
+ /*
+ * Disable the hypervisor feature bits in the processor feature
+ * registers if we don't have EL2.
*/
- cpu->isar.id_aa64pfr0 &= ~0xf00;
- cpu->isar.id_pfr1 &= ~0xf000;
+ cpu->isar.id_aa64pfr0 = FIELD_DP64(cpu->isar.id_aa64pfr0,
+ ID_AA64PFR0, EL2, 0);
+ cpu->isar.id_pfr1 = FIELD_DP32(cpu->isar.id_pfr1,
+ ID_PFR1, VIRTUALIZATION, 0);
}
#ifndef CONFIG_USER_ONLY
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 11/24] target/arm: Enable FEAT_Debugv8p2 for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (9 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 10/24] target/arm: Use field names for manipulating EL2 and EL3 modes Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 12/24] target/arm: Enable FEAT_Debugv8p4 " Richard Henderson
` (12 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
The only portion of FEAT_Debugv8p2 that is relevant to QEMU
is CONTEXTIDR_EL2, which is also conditionally implemented
with FEAT_VHE. The rest of the debug extension concerns the
External debug interface, which is outside the scope of QEMU.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst
---
docs/system/arm/emulation.rst | 1 +
target/arm/cpu.c | 1 +
target/arm/cpu64.c | 1 +
target/arm/cpu_tcg.c | 2 ++
4 files changed, 5 insertions(+)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index c3bd0676a8..965f35d8c9 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -14,6 +14,7 @@ the following architecture extensions:
- FEAT_BTI (Branch Target Identification)
- FEAT_DIT (Data Independent Timing instructions)
- FEAT_DPB (DC CVAP instruction)
+- FEAT_Debugv8p2 (Debug changes for v8.2)
- FEAT_DotProd (Advanced SIMD dot product instructions)
- FEAT_FCMA (Floating-point complex number instructions)
- FEAT_FHM (Floating-point half-precision multiplication instructions)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 7995ff2712..2667aaf28b 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1806,6 +1806,7 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
* feature registers as well.
*/
cpu->isar.id_pfr1 = FIELD_DP32(cpu->isar.id_pfr1, ID_PFR1, SECURITY, 0);
+ cpu->isar.id_dfr0 = FIELD_DP32(cpu->isar.id_dfr0, ID_DFR0, COPSDBG, 0);
cpu->isar.id_aa64pfr0 = FIELD_DP64(cpu->isar.id_aa64pfr0,
ID_AA64PFR0, EL3, 0);
}
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 5fce40a6bc..202fd5c46e 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -799,6 +799,7 @@ static void aarch64_max_initfn(Object *obj)
cpu->isar.id_aa64zfr0 = t;
t = cpu->isar.id_aa64dfr0;
+ t = FIELD_DP64(t, ID_AA64DFR0, DEBUGVER, 8); /* FEAT_Debugv8p2 */
t = FIELD_DP64(t, ID_AA64DFR0, PMUVER, 5); /* FEAT_PMUv3p4 */
cpu->isar.id_aa64dfr0 = t;
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index bc8f9d0edf..b6fc3752f2 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -76,6 +76,8 @@ void aa32_max_features(ARMCPU *cpu)
cpu->isar.id_pfr2 = t;
t = cpu->isar.id_dfr0;
+ t = FIELD_DP32(t, ID_DFR0, COPDBG, 8); /* FEAT_Debugv8p2 */
+ t = FIELD_DP32(t, ID_DFR0, COPSDBG, 8); /* FEAT_Debugv8p2 */
t = FIELD_DP32(t, ID_DFR0, PERFMON, 5); /* FEAT_PMUv3p4 */
cpu->isar.id_dfr0 = t;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 12/24] target/arm: Enable FEAT_Debugv8p4 for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (10 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 11/24] target/arm: Enable FEAT_Debugv8p2 for -cpu max Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 13/24] target/arm: Add minimal RAS registers Richard Henderson
` (11 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This extension concerns changes to the External Debug interface,
with Secure and Non-secure access to the debug registers, and all
of it is outside the scope of QEMU. Indicating support for this
is mandatory with FEAT_SEL2, which we do implement.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst
---
docs/system/arm/emulation.rst | 1 +
target/arm/cpu64.c | 2 +-
target/arm/cpu_tcg.c | 4 ++--
3 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index 965f35d8c9..0acac6347c 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -15,6 +15,7 @@ the following architecture extensions:
- FEAT_DIT (Data Independent Timing instructions)
- FEAT_DPB (DC CVAP instruction)
- FEAT_Debugv8p2 (Debug changes for v8.2)
+- FEAT_Debugv8p4 (Debug changes for v8.4)
- FEAT_DotProd (Advanced SIMD dot product instructions)
- FEAT_FCMA (Floating-point complex number instructions)
- FEAT_FHM (Floating-point half-precision multiplication instructions)
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 202fd5c46e..88d3cef93e 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -799,7 +799,7 @@ static void aarch64_max_initfn(Object *obj)
cpu->isar.id_aa64zfr0 = t;
t = cpu->isar.id_aa64dfr0;
- t = FIELD_DP64(t, ID_AA64DFR0, DEBUGVER, 8); /* FEAT_Debugv8p2 */
+ t = FIELD_DP64(t, ID_AA64DFR0, DEBUGVER, 9); /* FEAT_Debugv8p4 */
t = FIELD_DP64(t, ID_AA64DFR0, PMUVER, 5); /* FEAT_PMUv3p4 */
cpu->isar.id_aa64dfr0 = t;
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index b6fc3752f2..337598e949 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -76,8 +76,8 @@ void aa32_max_features(ARMCPU *cpu)
cpu->isar.id_pfr2 = t;
t = cpu->isar.id_dfr0;
- t = FIELD_DP32(t, ID_DFR0, COPDBG, 8); /* FEAT_Debugv8p2 */
- t = FIELD_DP32(t, ID_DFR0, COPSDBG, 8); /* FEAT_Debugv8p2 */
+ t = FIELD_DP32(t, ID_DFR0, COPDBG, 9); /* FEAT_Debugv8p4 */
+ t = FIELD_DP32(t, ID_DFR0, COPSDBG, 9); /* FEAT_Debugv8p4 */
t = FIELD_DP32(t, ID_DFR0, PERFMON, 5); /* FEAT_PMUv3p4 */
cpu->isar.id_dfr0 = t;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 13/24] target/arm: Add minimal RAS registers
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (11 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 12/24] target/arm: Enable FEAT_Debugv8p4 " Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 14/24] target/arm: Enable SCR and HCR bits for RAS Richard Henderson
` (10 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Add only the system registers required to implement zero error
records. This means that all values for ERRSELR are out of range,
which means that it and all of the indexed error record registers
need not be implemented.
Add the EL2 registers required for injecting virtual SError.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Leave ERRSELR_EL1 undefined.
v3: Rely on EL3-no-EL2 squashing during registration.
---
target/arm/cpu.h | 5 +++
target/arm/helper.c | 84 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 89 insertions(+)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index ca01f909a8..a55980d66d 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -525,6 +525,11 @@ typedef struct CPUArchState {
uint64_t tfsr_el[4]; /* tfsre0_el1 is index 0. */
uint64_t gcr_el1;
uint64_t rgsr_el1;
+
+ /* Minimal RAS registers */
+ uint64_t disr_el1;
+ uint64_t vdisr_el2;
+ uint64_t vsesr_el2;
} cp15;
struct {
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 7b31c71980..37c5e42bc0 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5980,6 +5980,87 @@ static const ARMCPRegInfo debug_lpae_cp_reginfo[] = {
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
};
+/*
+ * Check for traps to RAS registers, which are controlled
+ * by HCR_EL2.TERR and SCR_EL3.TERR.
+ */
+static CPAccessResult access_terr(CPUARMState *env, const ARMCPRegInfo *ri,
+ bool isread)
+{
+ int el = arm_current_el(env);
+
+ if (el < 2 && (arm_hcr_el2_eff(env) & HCR_TERR)) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ if (el < 3 && (env->cp15.scr_el3 & SCR_TERR)) {
+ return CP_ACCESS_TRAP_EL3;
+ }
+ return CP_ACCESS_OK;
+}
+
+static uint64_t disr_read(CPUARMState *env, const ARMCPRegInfo *ri)
+{
+ int el = arm_current_el(env);
+
+ if (el < 2 && (arm_hcr_el2_eff(env) & HCR_AMO)) {
+ return env->cp15.vdisr_el2;
+ }
+ if (el < 3 && (env->cp15.scr_el3 & SCR_EA)) {
+ return 0; /* RAZ/WI */
+ }
+ return env->cp15.disr_el1;
+}
+
+static void disr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t val)
+{
+ int el = arm_current_el(env);
+
+ if (el < 2 && (arm_hcr_el2_eff(env) & HCR_AMO)) {
+ env->cp15.vdisr_el2 = val;
+ return;
+ }
+ if (el < 3 && (env->cp15.scr_el3 & SCR_EA)) {
+ return; /* RAZ/WI */
+ }
+ env->cp15.disr_el1 = val;
+}
+
+/*
+ * Minimal RAS implementation with no Error Records.
+ * Which means that all of the Error Record registers:
+ * ERXADDR_EL1
+ * ERXCTLR_EL1
+ * ERXFR_EL1
+ * ERXMISC0_EL1
+ * ERXMISC1_EL1
+ * ERXMISC2_EL1
+ * ERXMISC3_EL1
+ * ERXPFGCDN_EL1 (RASv1p1)
+ * ERXPFGCTL_EL1 (RASv1p1)
+ * ERXPFGF_EL1 (RASv1p1)
+ * ERXSTATUS_EL1
+ * and
+ * ERRSELR_EL1
+ * may generate UNDEFINED, which is the effect we get by not
+ * listing them at all.
+ */
+static const ARMCPRegInfo minimal_ras_reginfo[] = {
+ { .name = "DISR_EL1", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 0, .crn = 12, .crm = 1, .opc2 = 1,
+ .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.disr_el1),
+ .readfn = disr_read, .writefn = disr_write, .raw_writefn = raw_write },
+ { .name = "ERRIDR_EL1", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 0, .crn = 5, .crm = 3, .opc2 = 0,
+ .access = PL1_R, .accessfn = access_terr,
+ .type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "VDISR_EL2", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 1, .opc2 = 1,
+ .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.vdisr_el2) },
+ { .name = "VSESR_EL2", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 4, .crn = 5, .crm = 2, .opc2 = 3,
+ .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.vsesr_el2) },
+};
+
/* Return the exception level to which exceptions should be taken
* via SVEAccessTrap. If an exception should be routed through
* AArch64.AdvSIMDFPAccessTrap, return 0; fp_exception_el should
@@ -8217,6 +8298,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
if (cpu_isar_feature(aa64_ssbs, cpu)) {
define_one_arm_cp_reg(cpu, &ssbs_reginfo);
}
+ if (cpu_isar_feature(any_ras, cpu)) {
+ define_arm_cp_regs(cpu, minimal_ras_reginfo);
+ }
if (cpu_isar_feature(aa64_vh, cpu) ||
cpu_isar_feature(aa64_debugv8p2, cpu)) {
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 14/24] target/arm: Enable SCR and HCR bits for RAS
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (12 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 13/24] target/arm: Add minimal RAS registers Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 15/24] target/arm: Implement virtual SError exceptions Richard Henderson
` (9 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Enable writes to the TERR and TEA bits when RAS is enabled.
These bits are otherwise RES0.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 37c5e42bc0..b6faebf4a7 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -1755,6 +1755,9 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
}
valid_mask &= ~SCR_NET;
+ if (cpu_isar_feature(aa64_ras, cpu)) {
+ valid_mask |= SCR_TERR;
+ }
if (cpu_isar_feature(aa64_lor, cpu)) {
valid_mask |= SCR_TLOR;
}
@@ -1769,6 +1772,9 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
}
} else {
valid_mask &= ~(SCR_RW | SCR_ST);
+ if (cpu_isar_feature(aa32_ras, cpu)) {
+ valid_mask |= SCR_TERR;
+ }
}
if (!arm_feature(env, ARM_FEATURE_EL2)) {
@@ -5126,6 +5132,9 @@ static void do_hcr_write(CPUARMState *env, uint64_t value, uint64_t valid_mask)
if (cpu_isar_feature(aa64_vh, cpu)) {
valid_mask |= HCR_E2H;
}
+ if (cpu_isar_feature(aa64_ras, cpu)) {
+ valid_mask |= HCR_TERR | HCR_TEA;
+ }
if (cpu_isar_feature(aa64_lor, cpu)) {
valid_mask |= HCR_TLOR;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 15/24] target/arm: Implement virtual SError exceptions
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (13 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 14/24] target/arm: Enable SCR and HCR bits for RAS Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 16/24] target/arm: Implement ESB instruction Richard Henderson
` (8 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Virtual SError exceptions are raised by setting HCR_EL2.VSE,
and are routed to EL1 just like other virtual exceptions.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Honor EAE for reporting VSERR to aa32.
---
target/arm/cpu.h | 2 ++
target/arm/internals.h | 8 ++++++++
target/arm/syndrome.h | 5 +++++
target/arm/cpu.c | 38 +++++++++++++++++++++++++++++++++++++-
target/arm/helper.c | 40 +++++++++++++++++++++++++++++++++++++++-
5 files changed, 91 insertions(+), 2 deletions(-)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index a55980d66d..aade9237bd 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -56,6 +56,7 @@
#define EXCP_LSERR 21 /* v8M LSERR SecureFault */
#define EXCP_UNALIGNED 22 /* v7M UNALIGNED UsageFault */
#define EXCP_DIVBYZERO 23 /* v7M DIVBYZERO UsageFault */
+#define EXCP_VSERR 24
/* NB: add new EXCP_ defines to the array in arm_log_exception() too */
#define ARMV7M_EXCP_RESET 1
@@ -89,6 +90,7 @@ enum {
#define CPU_INTERRUPT_FIQ CPU_INTERRUPT_TGT_EXT_1
#define CPU_INTERRUPT_VIRQ CPU_INTERRUPT_TGT_EXT_2
#define CPU_INTERRUPT_VFIQ CPU_INTERRUPT_TGT_EXT_3
+#define CPU_INTERRUPT_VSERR CPU_INTERRUPT_TGT_INT_0
/* The usual mapping for an AArch64 system register to its AArch32
* counterpart is for the 32 bit world to have access to the lower
diff --git a/target/arm/internals.h b/target/arm/internals.h
index c563b3735f..6ca0e95746 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -947,6 +947,14 @@ void arm_cpu_update_virq(ARMCPU *cpu);
*/
void arm_cpu_update_vfiq(ARMCPU *cpu);
+/**
+ * arm_cpu_update_vserr: Update CPU_INTERRUPT_VSERR bit
+ *
+ * Update the CPU_INTERRUPT_VSERR bit in cs->interrupt_request,
+ * following a change to the HCR_EL2.VSE bit.
+ */
+void arm_cpu_update_vserr(ARMCPU *cpu);
+
/**
* arm_mmu_idx_el:
* @env: The cpu environment
diff --git a/target/arm/syndrome.h b/target/arm/syndrome.h
index 8cde8e7243..0cb26dde7d 100644
--- a/target/arm/syndrome.h
+++ b/target/arm/syndrome.h
@@ -287,4 +287,9 @@ static inline uint32_t syn_pcalignment(void)
return (EC_PCALIGNMENT << ARM_EL_EC_SHIFT) | ARM_EL_IL;
}
+static inline uint32_t syn_serror(uint32_t extra)
+{
+ return (EC_SERROR << ARM_EL_EC_SHIFT) | ARM_EL_IL | extra;
+}
+
#endif /* TARGET_ARM_SYNDROME_H */
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 2667aaf28b..652a84cf84 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -85,7 +85,7 @@ static bool arm_cpu_has_work(CPUState *cs)
return (cpu->power_state != PSCI_OFF)
&& cs->interrupt_request &
(CPU_INTERRUPT_FIQ | CPU_INTERRUPT_HARD
- | CPU_INTERRUPT_VFIQ | CPU_INTERRUPT_VIRQ
+ | CPU_INTERRUPT_VFIQ | CPU_INTERRUPT_VIRQ | CPU_INTERRUPT_VSERR
| CPU_INTERRUPT_EXITTB);
}
@@ -511,6 +511,12 @@ static inline bool arm_excp_unmasked(CPUState *cs, unsigned int excp_idx,
return false;
}
return !(env->daif & PSTATE_I);
+ case EXCP_VSERR:
+ if (!(hcr_el2 & HCR_AMO) || (hcr_el2 & HCR_TGE)) {
+ /* VIRQs are only taken when hypervized. */
+ return false;
+ }
+ return !(env->daif & PSTATE_A);
default:
g_assert_not_reached();
}
@@ -632,6 +638,17 @@ static bool arm_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
goto found;
}
}
+ if (interrupt_request & CPU_INTERRUPT_VSERR) {
+ excp_idx = EXCP_VSERR;
+ target_el = 1;
+ if (arm_excp_unmasked(cs, excp_idx, target_el,
+ cur_el, secure, hcr_el2)) {
+ /* Taking a virtual abort clears HCR_EL2.VSE */
+ env->cp15.hcr_el2 &= ~HCR_VSE;
+ cpu_reset_interrupt(cs, CPU_INTERRUPT_VSERR);
+ goto found;
+ }
+ }
return false;
found:
@@ -684,6 +701,25 @@ void arm_cpu_update_vfiq(ARMCPU *cpu)
}
}
+void arm_cpu_update_vserr(ARMCPU *cpu)
+{
+ /*
+ * Update the interrupt level for VSERR, which is the HCR_EL2.VSE bit.
+ */
+ CPUARMState *env = &cpu->env;
+ CPUState *cs = CPU(cpu);
+
+ bool new_state = env->cp15.hcr_el2 & HCR_VSE;
+
+ if (new_state != ((cs->interrupt_request & CPU_INTERRUPT_VSERR) != 0)) {
+ if (new_state) {
+ cpu_interrupt(cs, CPU_INTERRUPT_VSERR);
+ } else {
+ cpu_reset_interrupt(cs, CPU_INTERRUPT_VSERR);
+ }
+ }
+}
+
#ifndef CONFIG_USER_ONLY
static void arm_cpu_set_irq(void *opaque, int irq, int level)
{
diff --git a/target/arm/helper.c b/target/arm/helper.c
index b6faebf4a7..4857d2dbb8 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -1863,7 +1863,12 @@ static uint64_t isr_read(CPUARMState *env, const ARMCPRegInfo *ri)
}
}
- /* External aborts are not possible in QEMU so A bit is always clear */
+ if (hcr_el2 & HCR_AMO) {
+ if (cs->interrupt_request & CPU_INTERRUPT_VSERR) {
+ ret |= CPSR_A;
+ }
+ }
+
return ret;
}
@@ -5175,6 +5180,7 @@ static void do_hcr_write(CPUARMState *env, uint64_t value, uint64_t valid_mask)
g_assert(qemu_mutex_iothread_locked());
arm_cpu_update_virq(cpu);
arm_cpu_update_vfiq(cpu);
+ arm_cpu_update_vserr(cpu);
}
static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
@@ -9331,6 +9337,7 @@ void arm_log_exception(CPUState *cs)
[EXCP_LSERR] = "v8M LSERR UsageFault",
[EXCP_UNALIGNED] = "v7M UNALIGNED UsageFault",
[EXCP_DIVBYZERO] = "v7M DIVBYZERO UsageFault",
+ [EXCP_VSERR] = "Virtual SERR",
};
if (idx >= 0 && idx < ARRAY_SIZE(excnames)) {
@@ -9843,6 +9850,31 @@ static void arm_cpu_do_interrupt_aarch32(CPUState *cs)
mask = CPSR_A | CPSR_I | CPSR_F;
offset = 4;
break;
+ case EXCP_VSERR:
+ {
+ /*
+ * Note that this is reported as a data abort, but the DFAR
+ * has an UNKNOWN value. Construct the SError syndrome from
+ * AET and ExT fields.
+ */
+ ARMMMUFaultInfo fi = { .type = ARMFault_AsyncExternal, };
+
+ if (extended_addresses_enabled(env)) {
+ env->exception.fsr = arm_fi_to_lfsc(&fi);
+ } else {
+ env->exception.fsr = arm_fi_to_sfsc(&fi);
+ }
+ env->exception.fsr |= env->cp15.vsesr_el2 & 0xd000;
+ A32_BANKED_CURRENT_REG_SET(env, dfsr, env->exception.fsr);
+ qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x\n",
+ env->exception.fsr);
+
+ new_mode = ARM_CPU_MODE_ABT;
+ addr = 0x10;
+ mask = CPSR_A | CPSR_I;
+ offset = 8;
+ }
+ break;
case EXCP_SMC:
new_mode = ARM_CPU_MODE_MON;
addr = 0x08;
@@ -10063,6 +10095,12 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
case EXCP_VFIQ:
addr += 0x100;
break;
+ case EXCP_VSERR:
+ addr += 0x180;
+ /* Construct the SError syndrome from IDS and ISS fields. */
+ env->exception.syndrome = syn_serror(env->cp15.vsesr_el2 & 0x1ffffff);
+ env->cp15.esr_el[new_el] = env->exception.syndrome;
+ break;
default:
cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
}
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 16/24] target/arm: Implement ESB instruction
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (14 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 15/24] target/arm: Implement virtual SError exceptions Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:49 ` [PATCH v5 17/24] target/arm: Enable FEAT_RAS for -cpu max Richard Henderson
` (7 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Check for and defer any pending virtual SError.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Retain m-profile check; improve comments.
---
target/arm/helper.h | 1 +
target/arm/a32.decode | 16 ++++++++------
target/arm/t32.decode | 18 ++++++++--------
target/arm/op_helper.c | 43 ++++++++++++++++++++++++++++++++++++++
target/arm/translate-a64.c | 17 +++++++++++++++
target/arm/translate.c | 23 ++++++++++++++++++++
6 files changed, 103 insertions(+), 15 deletions(-)
diff --git a/target/arm/helper.h b/target/arm/helper.h
index b463d9343b..b1334e0c42 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -54,6 +54,7 @@ DEF_HELPER_1(wfe, void, env)
DEF_HELPER_1(yield, void, env)
DEF_HELPER_1(pre_hvc, void, env)
DEF_HELPER_2(pre_smc, void, env, i32)
+DEF_HELPER_1(vesb, void, env)
DEF_HELPER_3(cpsr_write, void, env, i32, i32)
DEF_HELPER_2(cpsr_write_eret, void, env, i32)
diff --git a/target/arm/a32.decode b/target/arm/a32.decode
index fcd8cd4f7d..f2ca480949 100644
--- a/target/arm/a32.decode
+++ b/target/arm/a32.decode
@@ -187,13 +187,17 @@ SMULTT .... 0001 0110 .... 0000 .... 1110 .... @rd0mn
{
{
- YIELD ---- 0011 0010 0000 1111 ---- 0000 0001
- WFE ---- 0011 0010 0000 1111 ---- 0000 0010
- WFI ---- 0011 0010 0000 1111 ---- 0000 0011
+ [
+ YIELD ---- 0011 0010 0000 1111 ---- 0000 0001
+ WFE ---- 0011 0010 0000 1111 ---- 0000 0010
+ WFI ---- 0011 0010 0000 1111 ---- 0000 0011
- # TODO: Implement SEV, SEVL; may help SMP performance.
- # SEV ---- 0011 0010 0000 1111 ---- 0000 0100
- # SEVL ---- 0011 0010 0000 1111 ---- 0000 0101
+ # TODO: Implement SEV, SEVL; may help SMP performance.
+ # SEV ---- 0011 0010 0000 1111 ---- 0000 0100
+ # SEVL ---- 0011 0010 0000 1111 ---- 0000 0101
+
+ ESB ---- 0011 0010 0000 1111 ---- 0001 0000
+ ]
# The canonical nop ends in 00000000, but the whole of the
# rest of the space executes as nop if otherwise unsupported.
diff --git a/target/arm/t32.decode b/target/arm/t32.decode
index 78fadef9d6..f21ad0167a 100644
--- a/target/arm/t32.decode
+++ b/target/arm/t32.decode
@@ -364,17 +364,17 @@ CLZ 1111 1010 1011 ---- 1111 .... 1000 .... @rdm
[
# Hints, and CPS
{
- YIELD 1111 0011 1010 1111 1000 0000 0000 0001
- WFE 1111 0011 1010 1111 1000 0000 0000 0010
- WFI 1111 0011 1010 1111 1000 0000 0000 0011
+ [
+ YIELD 1111 0011 1010 1111 1000 0000 0000 0001
+ WFE 1111 0011 1010 1111 1000 0000 0000 0010
+ WFI 1111 0011 1010 1111 1000 0000 0000 0011
- # TODO: Implement SEV, SEVL; may help SMP performance.
- # SEV 1111 0011 1010 1111 1000 0000 0000 0100
- # SEVL 1111 0011 1010 1111 1000 0000 0000 0101
+ # TODO: Implement SEV, SEVL; may help SMP performance.
+ # SEV 1111 0011 1010 1111 1000 0000 0000 0100
+ # SEVL 1111 0011 1010 1111 1000 0000 0000 0101
- # For M-profile minimal-RAS ESB can be a NOP, which is the
- # default behaviour since it is in the hint space.
- # ESB 1111 0011 1010 1111 1000 0000 0001 0000
+ ESB 1111 0011 1010 1111 1000 0000 0001 0000
+ ]
# The canonical nop ends in 0000 0000, but the whole rest
# of the space is "reserved hint, behaves as nop".
diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index 76499ffa14..390b6578a8 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -960,3 +960,46 @@ void HELPER(probe_access)(CPUARMState *env, target_ulong ptr,
access_type, mmu_idx, ra);
}
}
+
+/*
+ * This function corresponds to AArch64.vESBOperation().
+ * Note that the AArch32 version is not functionally different.
+ */
+void HELPER(vesb)(CPUARMState *env)
+{
+ /*
+ * The EL2Enabled() check is done inside arm_hcr_el2_eff,
+ * and will return HCR_EL2.VSE == 0, so nothing happens.
+ */
+ uint64_t hcr = arm_hcr_el2_eff(env);
+ bool enabled = !(hcr & HCR_TGE) && (hcr & HCR_AMO);
+ bool pending = enabled && (hcr & HCR_VSE);
+ bool masked = (env->daif & PSTATE_A);
+
+ /* If VSE pending and masked, defer the exception. */
+ if (pending && masked) {
+ uint32_t syndrome;
+
+ if (arm_el_is_aa64(env, 1)) {
+ /* Copy across IDS and ISS from VSESR. */
+ syndrome = env->cp15.vsesr_el2 & 0x1ffffff;
+ } else {
+ ARMMMUFaultInfo fi = { .type = ARMFault_AsyncExternal };
+
+ if (extended_addresses_enabled(env)) {
+ syndrome = arm_fi_to_lfsc(&fi);
+ } else {
+ syndrome = arm_fi_to_sfsc(&fi);
+ }
+ /* Copy across AET and ExT from VSESR. */
+ syndrome |= env->cp15.vsesr_el2 & 0xd000;
+ }
+
+ /* Set VDISR_EL2.A along with the syndrome. */
+ env->cp15.vdisr_el2 = syndrome | (1u << 31);
+
+ /* Clear pending virtual SError */
+ env->cp15.hcr_el2 &= ~HCR_VSE;
+ cpu_reset_interrupt(env_cpu(env), CPU_INTERRUPT_VSERR);
+ }
+}
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index b80313670f..5a02e076b7 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -1454,6 +1454,23 @@ static void handle_hint(DisasContext *s, uint32_t insn,
gen_helper_autib(cpu_X[17], cpu_env, cpu_X[17], cpu_X[16]);
}
break;
+ case 0b10000: /* ESB */
+ /* Without RAS, we must implement this as NOP. */
+ if (dc_isar_feature(aa64_ras, s)) {
+ /*
+ * QEMU does not have a source of physical SErrors,
+ * so we are only concerned with virtual SErrors.
+ * The pseudocode in the ARM for this case is
+ * if PSTATE.EL IN {EL0, EL1} && EL2Enabled() then
+ * AArch64.vESBOperation();
+ * Most of the condition can be evaluated at translation time.
+ * Test for EL2 present, and defer test for SEL2 to runtime.
+ */
+ if (s->current_el <= 1 && arm_dc_feature(s, ARM_FEATURE_EL2)) {
+ gen_helper_vesb(cpu_env);
+ }
+ }
+ break;
case 0b11000: /* PACIAZ */
if (s->pauth_active) {
gen_helper_pacia(cpu_X[30], cpu_env, cpu_X[30],
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 4e19191ed5..87a899d638 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -6239,6 +6239,29 @@ static bool trans_WFI(DisasContext *s, arg_WFI *a)
return true;
}
+static bool trans_ESB(DisasContext *s, arg_ESB *a)
+{
+ /*
+ * For M-profile, minimal-RAS ESB can be a NOP.
+ * Without RAS, we must implement this as NOP.
+ */
+ if (!arm_dc_feature(s, ARM_FEATURE_M) && dc_isar_feature(aa32_ras, s)) {
+ /*
+ * QEMU does not have a source of physical SErrors,
+ * so we are only concerned with virtual SErrors.
+ * The pseudocode in the ARM for this case is
+ * if PSTATE.EL IN {EL0, EL1} && EL2Enabled() then
+ * AArch32.vESBOperation();
+ * Most of the condition can be evaluated at translation time.
+ * Test for EL2 present, and defer test for SEL2 to runtime.
+ */
+ if (s->current_el <= 1 && arm_dc_feature(s, ARM_FEATURE_EL2)) {
+ gen_helper_vesb(cpu_env);
+ }
+ }
+ return true;
+}
+
static bool trans_NOP(DisasContext *s, arg_NOP *a)
{
return true;
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 17/24] target/arm: Enable FEAT_RAS for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (15 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 16/24] target/arm: Implement ESB instruction Richard Henderson
@ 2022-05-05 18:49 ` Richard Henderson
2022-05-05 18:50 ` [PATCH v5 18/24] target/arm: Enable FEAT_IESB " Richard Henderson
` (6 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:49 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst
---
docs/system/arm/emulation.rst | 1 +
target/arm/cpu64.c | 1 +
target/arm/cpu_tcg.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index 0acac6347c..8110408000 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -42,6 +42,7 @@ the following architecture extensions:
- FEAT_PMULL (PMULL, PMULL2 instructions)
- FEAT_PMUv3p1 (PMU Extensions v3.1)
- FEAT_PMUv3p4 (PMU Extensions v3.4)
+- FEAT_RAS (Reliability, availability, and serviceability)
- FEAT_RDM (Advanced SIMD rounding double multiply accumulate instructions)
- FEAT_RNG (Random number generator)
- FEAT_SB (Speculation Barrier)
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 88d3cef93e..35881c74b2 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -744,6 +744,7 @@ static void aarch64_max_initfn(Object *obj)
t = cpu->isar.id_aa64pfr0;
t = FIELD_DP64(t, ID_AA64PFR0, FP, 1); /* FEAT_FP16 */
t = FIELD_DP64(t, ID_AA64PFR0, ADVSIMD, 1); /* FEAT_FP16 */
+ t = FIELD_DP64(t, ID_AA64PFR0, RAS, 1); /* FEAT_RAS */
t = FIELD_DP64(t, ID_AA64PFR0, SVE, 1);
t = FIELD_DP64(t, ID_AA64PFR0, SEL2, 1); /* FEAT_SEL2 */
t = FIELD_DP64(t, ID_AA64PFR0, DIT, 1); /* FEAT_DIT */
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index 337598e949..c5cf7efe95 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -69,6 +69,7 @@ void aa32_max_features(ARMCPU *cpu)
t = cpu->isar.id_pfr0;
t = FIELD_DP32(t, ID_PFR0, DIT, 1); /* FEAT_DIT */
+ t = FIELD_DP32(t, ID_PFR0, RAS, 1); /* FEAT_RAS */
cpu->isar.id_pfr0 = t;
t = cpu->isar.id_pfr2;
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 18/24] target/arm: Enable FEAT_IESB for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (16 preceding siblings ...)
2022-05-05 18:49 ` [PATCH v5 17/24] target/arm: Enable FEAT_RAS for -cpu max Richard Henderson
@ 2022-05-05 18:50 ` Richard Henderson
2022-05-05 18:50 ` [PATCH v5 19/24] target/arm: Enable FEAT_CSV2 " Richard Henderson
` (5 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:50 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This feature is AArch64 only, and applies to physical SErrors,
which QEMU does not implement, thus the feature is a nop.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst
---
docs/system/arm/emulation.rst | 1 +
target/arm/cpu64.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index 8110408000..b200012d89 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -25,6 +25,7 @@ the following architecture extensions:
- FEAT_FlagM2 (Enhancements to flag manipulation instructions)
- FEAT_HPDS (Hierarchical permission disables)
- FEAT_I8MM (AArch64 Int8 matrix multiplication instructions)
+- FEAT_IESB (Implicit error synchronization event)
- FEAT_JSCVT (JavaScript conversion instructions)
- FEAT_LOR (Limited ordering regions)
- FEAT_LPA (Large Physical Address space)
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 35881c74b2..10410619f9 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -781,6 +781,7 @@ static void aarch64_max_initfn(Object *obj)
t = cpu->isar.id_aa64mmfr2;
t = FIELD_DP64(t, ID_AA64MMFR2, CNP, 1); /* FEAT_TTCNP */
t = FIELD_DP64(t, ID_AA64MMFR2, UAO, 1); /* FEAT_UAO */
+ t = FIELD_DP64(t, ID_AA64MMFR2, IESB, 1); /* FEAT_IESB */
t = FIELD_DP64(t, ID_AA64MMFR2, VARANGE, 1); /* FEAT_LVA */
t = FIELD_DP64(t, ID_AA64MMFR2, ST, 1); /* FEAT_TTST */
t = FIELD_DP64(t, ID_AA64MMFR2, TTL, 1); /* FEAT_TTL */
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 19/24] target/arm: Enable FEAT_CSV2 for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (17 preceding siblings ...)
2022-05-05 18:50 ` [PATCH v5 18/24] target/arm: Enable FEAT_IESB " Richard Henderson
@ 2022-05-05 18:50 ` Richard Henderson
2022-05-05 18:50 ` [PATCH v5 20/24] target/arm: Enable FEAT_CSV2_2 " Richard Henderson
` (4 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:50 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This extension concerns branch speculation, which TCG does
not implement. Thus we can trivially enable this feature.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst
---
docs/system/arm/emulation.rst | 1 +
target/arm/cpu64.c | 1 +
target/arm/cpu_tcg.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index b200012d89..b2a3e2a437 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -12,6 +12,7 @@ the following architecture extensions:
- FEAT_BBM at level 2 (Translation table break-before-make levels)
- FEAT_BF16 (AArch64 BFloat16 instructions)
- FEAT_BTI (Branch Target Identification)
+- FEAT_CSV2 (Cache speculation variant 2)
- FEAT_DIT (Data Independent Timing instructions)
- FEAT_DPB (DC CVAP instruction)
- FEAT_Debugv8p2 (Debug changes for v8.2)
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 10410619f9..25fe74f928 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -748,6 +748,7 @@ static void aarch64_max_initfn(Object *obj)
t = FIELD_DP64(t, ID_AA64PFR0, SVE, 1);
t = FIELD_DP64(t, ID_AA64PFR0, SEL2, 1); /* FEAT_SEL2 */
t = FIELD_DP64(t, ID_AA64PFR0, DIT, 1); /* FEAT_DIT */
+ t = FIELD_DP64(t, ID_AA64PFR0, CSV2, 1); /* FEAT_CSV2 */
cpu->isar.id_aa64pfr0 = t;
t = cpu->isar.id_aa64pfr1;
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index c5cf7efe95..762b961707 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -68,6 +68,7 @@ void aa32_max_features(ARMCPU *cpu)
cpu->isar.id_mmfr4 = t;
t = cpu->isar.id_pfr0;
+ t = FIELD_DP32(t, ID_PFR0, CSV2, 2); /* FEAT_CVS2 */
t = FIELD_DP32(t, ID_PFR0, DIT, 1); /* FEAT_DIT */
t = FIELD_DP32(t, ID_PFR0, RAS, 1); /* FEAT_RAS */
cpu->isar.id_pfr0 = t;
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 20/24] target/arm: Enable FEAT_CSV2_2 for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (18 preceding siblings ...)
2022-05-05 18:50 ` [PATCH v5 19/24] target/arm: Enable FEAT_CSV2 " Richard Henderson
@ 2022-05-05 18:50 ` Richard Henderson
2022-05-06 12:12 ` Peter Maydell
2022-05-05 18:50 ` [PATCH v5 21/24] target/arm: Enable FEAT_CSV3 " Richard Henderson
` (3 subsequent siblings)
23 siblings, 1 reply; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:50 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm
There is no branch prediction in TCG, therefore there is no
need to actually include the context number into the predictor.
Therefore all we need to do is add the state for SCXTNUM_ELx.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst; clear CSV2_FRAC; use decimal; tidy access_scxtnum.
v3: Rely on EL3-no-EL2 squashing during registration.
v5: Set SCTLR_EL1.TSCXT at user-only startup.
---
docs/system/arm/emulation.rst | 3 ++
target/arm/cpu.h | 16 +++++++++
target/arm/cpu.c | 5 +++
target/arm/cpu64.c | 3 +-
target/arm/helper.c | 61 ++++++++++++++++++++++++++++++++++-
5 files changed, 86 insertions(+), 2 deletions(-)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index b2a3e2a437..9765ee3eaf 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -13,6 +13,9 @@ the following architecture extensions:
- FEAT_BF16 (AArch64 BFloat16 instructions)
- FEAT_BTI (Branch Target Identification)
- FEAT_CSV2 (Cache speculation variant 2)
+- FEAT_CSV2_1p1 (Cache speculation variant 2, version 1.1)
+- FEAT_CSV2_1p2 (Cache speculation variant 2, version 1.2)
+- FEAT_CSV2_2 (Cache speculation variant 2, version 2)
- FEAT_DIT (Data Independent Timing instructions)
- FEAT_DPB (DC CVAP instruction)
- FEAT_Debugv8p2 (Debug changes for v8.2)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index aade9237bd..18ca61e8e2 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -688,6 +688,8 @@ typedef struct CPUArchState {
ARMPACKey apdb;
ARMPACKey apga;
} keys;
+
+ uint64_t scxtnum_el[4];
#endif
#if defined(CONFIG_USER_ONLY)
@@ -1211,6 +1213,7 @@ void pmu_init(ARMCPU *cpu);
#define SCTLR_WXN (1U << 19)
#define SCTLR_ST (1U << 20) /* up to ??, RAZ in v6 */
#define SCTLR_UWXN (1U << 20) /* v7 onward, AArch32 only */
+#define SCTLR_TSCXT (1U << 20) /* FEAT_CSV2_1p2, AArch64 only */
#define SCTLR_FI (1U << 21) /* up to v7, v8 RES0 */
#define SCTLR_IESB (1U << 21) /* v8.2-IESB, AArch64 only */
#define SCTLR_U (1U << 22) /* up to v6, RAO in v7 */
@@ -4022,6 +4025,19 @@ static inline bool isar_feature_aa64_dit(const ARMISARegisters *id)
return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, DIT) != 0;
}
+static inline bool isar_feature_aa64_scxtnum(const ARMISARegisters *id)
+{
+ int key = FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, CSV2);
+ if (key >= 2) {
+ return true; /* FEAT_CSV2_2 */
+ }
+ if (key == 1) {
+ key = FIELD_EX64(id->id_aa64pfr1, ID_AA64PFR1, CSV2_FRAC);
+ return key >= 2; /* FEAT_CSV2_1p2 */
+ }
+ return false;
+}
+
static inline bool isar_feature_aa64_ssbs(const ARMISARegisters *id)
{
return FIELD_EX64(id->id_aa64pfr1, ID_AA64PFR1, SSBS) != 0;
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 652a84cf84..59df597e05 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -230,6 +230,11 @@ static void arm_cpu_reset(DeviceState *dev)
*/
env->cp15.gcr_el1 = 0x1ffff;
}
+ /*
+ * Disable access to SCXTNUM_EL0 from CSV2_1p2.
+ * This is not yet exposed from the Linux kernel in any way.
+ */
+ env->cp15.sctlr_el[1] |= SCTLR_TSCXT;
#else
/* Reset into the highest available EL */
if (arm_feature(env, ARM_FEATURE_EL3)) {
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 25fe74f928..07b44a62be 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -748,7 +748,7 @@ static void aarch64_max_initfn(Object *obj)
t = FIELD_DP64(t, ID_AA64PFR0, SVE, 1);
t = FIELD_DP64(t, ID_AA64PFR0, SEL2, 1); /* FEAT_SEL2 */
t = FIELD_DP64(t, ID_AA64PFR0, DIT, 1); /* FEAT_DIT */
- t = FIELD_DP64(t, ID_AA64PFR0, CSV2, 1); /* FEAT_CSV2 */
+ t = FIELD_DP64(t, ID_AA64PFR0, CSV2, 2); /* FEAT_CSV2_2 */
cpu->isar.id_aa64pfr0 = t;
t = cpu->isar.id_aa64pfr1;
@@ -760,6 +760,7 @@ static void aarch64_max_initfn(Object *obj)
* we do for EL2 with the virtualization=on property.
*/
t = FIELD_DP64(t, ID_AA64PFR1, MTE, 3); /* FEAT_MTE3 */
+ t = FIELD_DP64(t, ID_AA64PFR1, CSV2_FRAC, 0); /* FEAT_CSV2_2 */
cpu->isar.id_aa64pfr1 = t;
t = cpu->isar.id_aa64mmfr0;
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 4857d2dbb8..432bd81919 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -1770,6 +1770,9 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
if (cpu_isar_feature(aa64_mte, cpu)) {
valid_mask |= SCR_ATA;
}
+ if (cpu_isar_feature(aa64_scxtnum, cpu)) {
+ valid_mask |= SCR_ENSCXT;
+ }
} else {
valid_mask &= ~(SCR_RW | SCR_ST);
if (cpu_isar_feature(aa32_ras, cpu)) {
@@ -5149,6 +5152,9 @@ static void do_hcr_write(CPUARMState *env, uint64_t value, uint64_t valid_mask)
if (cpu_isar_feature(aa64_mte, cpu)) {
valid_mask |= HCR_ATA | HCR_DCT | HCR_TID5;
}
+ if (cpu_isar_feature(aa64_scxtnum, cpu)) {
+ valid_mask |= HCR_ENSCXT;
+ }
}
/* Clear RES0 bits. */
@@ -5800,6 +5806,10 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
{ K(3, 0, 5, 6, 0), K(3, 4, 5, 6, 0), K(3, 5, 5, 6, 0),
"TFSR_EL1", "TFSR_EL2", "TFSR_EL12", isar_feature_aa64_mte },
+ { K(3, 0, 13, 0, 7), K(3, 4, 13, 0, 7), K(3, 5, 13, 0, 7),
+ "SCXTNUM_EL1", "SCXTNUM_EL2", "SCXTNUM_EL12",
+ isar_feature_aa64_scxtnum },
+
/* TODO: ARMv8.2-SPE -- PMSCR_EL2 */
/* TODO: ARMv8.4-Trace -- TRFCR_EL2 */
};
@@ -7223,7 +7233,52 @@ static const ARMCPRegInfo mte_el0_cacheop_reginfo[] = {
},
};
-#endif
+static CPAccessResult access_scxtnum(CPUARMState *env, const ARMCPRegInfo *ri,
+ bool isread)
+{
+ uint64_t hcr = arm_hcr_el2_eff(env);
+ int el = arm_current_el(env);
+
+ if (el == 0 && !((hcr & HCR_E2H) && (hcr & HCR_TGE))) {
+ if (env->cp15.sctlr_el[1] & SCTLR_TSCXT) {
+ if (hcr & HCR_TGE) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ return CP_ACCESS_TRAP;
+ }
+ } else if (el < 2 && (env->cp15.sctlr_el[2] & SCTLR_TSCXT)) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ if (el < 2 && arm_is_el2_enabled(env) && !(hcr & HCR_ENSCXT)) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ if (el < 3
+ && arm_feature(env, ARM_FEATURE_EL3)
+ && !(env->cp15.scr_el3 & SCR_ENSCXT)) {
+ return CP_ACCESS_TRAP_EL3;
+ }
+ return CP_ACCESS_OK;
+}
+
+static const ARMCPRegInfo scxtnum_reginfo[] = {
+ { .name = "SCXTNUM_EL0", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 3, .crn = 13, .crm = 0, .opc2 = 7,
+ .access = PL0_RW, .accessfn = access_scxtnum,
+ .fieldoffset = offsetof(CPUARMState, scxtnum_el[0]) },
+ { .name = "SCXTNUM_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 7,
+ .access = PL1_RW, .accessfn = access_scxtnum,
+ .fieldoffset = offsetof(CPUARMState, scxtnum_el[1]) },
+ { .name = "SCXTNUM_EL2", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 7,
+ .access = PL2_RW, .accessfn = access_scxtnum,
+ .fieldoffset = offsetof(CPUARMState, scxtnum_el[2]) },
+ { .name = "SCXTNUM_EL3", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 6, .crn = 13, .crm = 0, .opc2 = 7,
+ .access = PL3_RW,
+ .fieldoffset = offsetof(CPUARMState, scxtnum_el[3]) },
+};
+#endif /* TARGET_AARCH64 */
static CPAccessResult access_predinv(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
@@ -8365,6 +8420,10 @@ void register_cp_regs_for_features(ARMCPU *cpu)
define_arm_cp_regs(cpu, mte_tco_ro_reginfo);
define_arm_cp_regs(cpu, mte_el0_cacheop_reginfo);
}
+
+ if (cpu_isar_feature(aa64_scxtnum, cpu)) {
+ define_arm_cp_regs(cpu, scxtnum_reginfo);
+ }
#endif
if (cpu_isar_feature(any_predinv, cpu)) {
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 21/24] target/arm: Enable FEAT_CSV3 for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (19 preceding siblings ...)
2022-05-05 18:50 ` [PATCH v5 20/24] target/arm: Enable FEAT_CSV2_2 " Richard Henderson
@ 2022-05-05 18:50 ` Richard Henderson
2022-05-05 18:50 ` [PATCH v5 22/24] target/arm: Enable FEAT_DGH " Richard Henderson
` (2 subsequent siblings)
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:50 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This extension concerns cache speculation, which TCG does
not implement. Thus we can trivially enable this feature.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst
---
docs/system/arm/emulation.rst | 1 +
target/arm/cpu64.c | 1 +
target/arm/cpu_tcg.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index 9765ee3eaf..48522b8e1c 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -16,6 +16,7 @@ the following architecture extensions:
- FEAT_CSV2_1p1 (Cache speculation variant 2, version 1.1)
- FEAT_CSV2_1p2 (Cache speculation variant 2, version 1.2)
- FEAT_CSV2_2 (Cache speculation variant 2, version 2)
+- FEAT_CSV3 (Cache speculation variant 3)
- FEAT_DIT (Data Independent Timing instructions)
- FEAT_DPB (DC CVAP instruction)
- FEAT_Debugv8p2 (Debug changes for v8.2)
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 07b44a62be..40f77defb5 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -749,6 +749,7 @@ static void aarch64_max_initfn(Object *obj)
t = FIELD_DP64(t, ID_AA64PFR0, SEL2, 1); /* FEAT_SEL2 */
t = FIELD_DP64(t, ID_AA64PFR0, DIT, 1); /* FEAT_DIT */
t = FIELD_DP64(t, ID_AA64PFR0, CSV2, 2); /* FEAT_CSV2_2 */
+ t = FIELD_DP64(t, ID_AA64PFR0, CSV3, 1); /* FEAT_CSV3 */
cpu->isar.id_aa64pfr0 = t;
t = cpu->isar.id_aa64pfr1;
diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
index 762b961707..ea4eccddc3 100644
--- a/target/arm/cpu_tcg.c
+++ b/target/arm/cpu_tcg.c
@@ -74,6 +74,7 @@ void aa32_max_features(ARMCPU *cpu)
cpu->isar.id_pfr0 = t;
t = cpu->isar.id_pfr2;
+ t = FIELD_DP32(t, ID_PFR2, CSV3, 1); /* FEAT_CSV3 */
t = FIELD_DP32(t, ID_PFR2, SSBS, 1); /* FEAT_SSBS */
cpu->isar.id_pfr2 = t;
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 22/24] target/arm: Enable FEAT_DGH for -cpu max
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (20 preceding siblings ...)
2022-05-05 18:50 ` [PATCH v5 21/24] target/arm: Enable FEAT_CSV3 " Richard Henderson
@ 2022-05-05 18:50 ` Richard Henderson
2022-05-05 18:50 ` [PATCH v5 23/24] target/arm: Define cortex-a76 Richard Henderson
2022-05-05 18:50 ` [PATCH v5 24/24] target/arm: Define neoverse-n1 Richard Henderson
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:50 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This extension concerns not merging memory access, which TCG does
not implement. Thus we can trivially enable this feature.
Add a comment to handle_hint for the DGH instruction, but no code.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Update emulation.rst
---
docs/system/arm/emulation.rst | 1 +
target/arm/cpu64.c | 1 +
target/arm/translate-a64.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index 48522b8e1c..8ed466bf68 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -17,6 +17,7 @@ the following architecture extensions:
- FEAT_CSV2_1p2 (Cache speculation variant 2, version 1.2)
- FEAT_CSV2_2 (Cache speculation variant 2, version 2)
- FEAT_CSV3 (Cache speculation variant 3)
+- FEAT_DGH (Data gathering hint)
- FEAT_DIT (Data Independent Timing instructions)
- FEAT_DPB (DC CVAP instruction)
- FEAT_Debugv8p2 (Debug changes for v8.2)
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 40f77defb5..f55121060d 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -738,6 +738,7 @@ static void aarch64_max_initfn(Object *obj)
t = FIELD_DP64(t, ID_AA64ISAR1, SB, 1); /* FEAT_SB */
t = FIELD_DP64(t, ID_AA64ISAR1, SPECRES, 1); /* FEAT_SPECRES */
t = FIELD_DP64(t, ID_AA64ISAR1, BF16, 1); /* FEAT_BF16 */
+ t = FIELD_DP64(t, ID_AA64ISAR1, DGH, 1); /* FEAT_DGH */
t = FIELD_DP64(t, ID_AA64ISAR1, I8MM, 1); /* FEAT_I8MM */
cpu->isar.id_aa64isar1 = t;
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 5a02e076b7..6a27234a5c 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -1427,6 +1427,7 @@ static void handle_hint(DisasContext *s, uint32_t insn,
break;
case 0b00100: /* SEV */
case 0b00101: /* SEVL */
+ case 0b00110: /* DGH */
/* we treat all as NOP at least for now */
break;
case 0b00111: /* XPACLRI */
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 23/24] target/arm: Define cortex-a76
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (21 preceding siblings ...)
2022-05-05 18:50 ` [PATCH v5 22/24] target/arm: Enable FEAT_DGH " Richard Henderson
@ 2022-05-05 18:50 ` Richard Henderson
2022-05-05 18:50 ` [PATCH v5 24/24] target/arm: Define neoverse-n1 Richard Henderson
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:50 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Enable the a76 for virt and sbsa board use.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
docs/system/arm/virt.rst | 1 +
hw/arm/sbsa-ref.c | 1 +
hw/arm/virt.c | 1 +
target/arm/cpu64.c | 66 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 69 insertions(+)
diff --git a/docs/system/arm/virt.rst b/docs/system/arm/virt.rst
index 5fe045cbf0..3e264d85af 100644
--- a/docs/system/arm/virt.rst
+++ b/docs/system/arm/virt.rst
@@ -55,6 +55,7 @@ Supported guest CPU types:
- ``cortex-a53`` (64-bit)
- ``cortex-a57`` (64-bit)
- ``cortex-a72`` (64-bit)
+- ``cortex-a76`` (64-bit)
- ``a64fx`` (64-bit)
- ``host`` (with KVM only)
- ``max`` (same as ``host`` for KVM; best possible emulation with TCG)
diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index 2387401963..2ddde88f5e 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -145,6 +145,7 @@ static const int sbsa_ref_irqmap[] = {
static const char * const valid_cpus[] = {
ARM_CPU_TYPE_NAME("cortex-a57"),
ARM_CPU_TYPE_NAME("cortex-a72"),
+ ARM_CPU_TYPE_NAME("cortex-a76"),
ARM_CPU_TYPE_NAME("max"),
};
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index f94278935f..12bc2318ec 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -202,6 +202,7 @@ static const char *valid_cpus[] = {
ARM_CPU_TYPE_NAME("cortex-a53"),
ARM_CPU_TYPE_NAME("cortex-a57"),
ARM_CPU_TYPE_NAME("cortex-a72"),
+ ARM_CPU_TYPE_NAME("cortex-a76"),
ARM_CPU_TYPE_NAME("a64fx"),
ARM_CPU_TYPE_NAME("host"),
ARM_CPU_TYPE_NAME("max"),
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index f55121060d..adfe6b26be 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -194,6 +194,71 @@ static void aarch64_a72_initfn(Object *obj)
define_cortex_a72_a57_a53_cp_reginfo(cpu);
}
+static void aarch64_a76_initfn(Object *obj)
+{
+ ARMCPU *cpu = ARM_CPU(obj);
+
+ cpu->dtb_compatible = "arm,cortex-a76";
+ set_feature(&cpu->env, ARM_FEATURE_V8);
+ set_feature(&cpu->env, ARM_FEATURE_NEON);
+ set_feature(&cpu->env, ARM_FEATURE_GENERIC_TIMER);
+ set_feature(&cpu->env, ARM_FEATURE_AARCH64);
+ set_feature(&cpu->env, ARM_FEATURE_CBAR_RO);
+ set_feature(&cpu->env, ARM_FEATURE_EL2);
+ set_feature(&cpu->env, ARM_FEATURE_EL3);
+ set_feature(&cpu->env, ARM_FEATURE_PMU);
+
+ /* Ordered by B2.4 AArch64 registers by functional group */
+ cpu->clidr = 0x82000023;
+ cpu->ctr = 0x8444C004;
+ cpu->dcz_blocksize = 4;
+ cpu->isar.id_aa64dfr0 = 0x0000000010305408ull;
+ cpu->isar.id_aa64isar0 = 0x0000100010211120ull;
+ cpu->isar.id_aa64isar1 = 0x0000000000100001ull;
+ cpu->isar.id_aa64mmfr0 = 0x0000000000101122ull;
+ cpu->isar.id_aa64mmfr1 = 0x0000000010212122ull;
+ cpu->isar.id_aa64mmfr2 = 0x0000000000001011ull;
+ cpu->isar.id_aa64pfr0 = 0x1100000010111112ull; /* GIC filled in later */
+ cpu->isar.id_aa64pfr1 = 0x0000000000000010ull;
+ cpu->id_afr0 = 0x00000000;
+ cpu->isar.id_dfr0 = 0x04010088;
+ cpu->isar.id_isar0 = 0x02101110;
+ cpu->isar.id_isar1 = 0x13112111;
+ cpu->isar.id_isar2 = 0x21232042;
+ cpu->isar.id_isar3 = 0x01112131;
+ cpu->isar.id_isar4 = 0x00010142;
+ cpu->isar.id_isar5 = 0x01011121;
+ cpu->isar.id_isar6 = 0x00000010;
+ cpu->isar.id_mmfr0 = 0x10201105;
+ cpu->isar.id_mmfr1 = 0x40000000;
+ cpu->isar.id_mmfr2 = 0x01260000;
+ cpu->isar.id_mmfr3 = 0x02122211;
+ cpu->isar.id_mmfr4 = 0x00021110;
+ cpu->isar.id_pfr0 = 0x10010131;
+ cpu->isar.id_pfr1 = 0x00010000; /* GIC filled in later */
+ cpu->isar.id_pfr2 = 0x00000011;
+ cpu->midr = 0x414fd0b1; /* r4p1 */
+ cpu->revidr = 0;
+
+ /* From B2.18 CCSIDR_EL1 */
+ cpu->ccsidr[0] = 0x701fe01a; /* 64KB L1 dcache */
+ cpu->ccsidr[1] = 0x201fe01a; /* 64KB L1 icache */
+ cpu->ccsidr[2] = 0x707fe03a; /* 512KB L2 cache */
+
+ /* From B2.93 SCTLR_EL3 */
+ cpu->reset_sctlr = 0x30c50838;
+
+ /* From B4.23 ICH_VTR_EL2 */
+ cpu->gic_num_lrs = 4;
+ cpu->gic_vpribits = 5;
+ cpu->gic_vprebits = 5;
+
+ /* From B5.1 AdvSIMD AArch64 register summary */
+ cpu->isar.mvfr0 = 0x10110222;
+ cpu->isar.mvfr1 = 0x13211111;
+ cpu->isar.mvfr2 = 0x00000043;
+}
+
void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp)
{
/*
@@ -881,6 +946,7 @@ static const ARMCPUInfo aarch64_cpus[] = {
{ .name = "cortex-a57", .initfn = aarch64_a57_initfn },
{ .name = "cortex-a53", .initfn = aarch64_a53_initfn },
{ .name = "cortex-a72", .initfn = aarch64_a72_initfn },
+ { .name = "cortex-a76", .initfn = aarch64_a76_initfn },
{ .name = "a64fx", .initfn = aarch64_a64fx_initfn },
{ .name = "max", .initfn = aarch64_max_initfn },
#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* [PATCH v5 24/24] target/arm: Define neoverse-n1
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
` (22 preceding siblings ...)
2022-05-05 18:50 ` [PATCH v5 23/24] target/arm: Define cortex-a76 Richard Henderson
@ 2022-05-05 18:50 ` Richard Henderson
23 siblings, 0 replies; 28+ messages in thread
From: Richard Henderson @ 2022-05-05 18:50 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Enable the n1 for virt and sbsa board use.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
docs/system/arm/virt.rst | 1 +
hw/arm/sbsa-ref.c | 1 +
hw/arm/virt.c | 1 +
target/arm/cpu64.c | 66 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 69 insertions(+)
diff --git a/docs/system/arm/virt.rst b/docs/system/arm/virt.rst
index 3e264d85af..3d1058a80c 100644
--- a/docs/system/arm/virt.rst
+++ b/docs/system/arm/virt.rst
@@ -58,6 +58,7 @@ Supported guest CPU types:
- ``cortex-a76`` (64-bit)
- ``a64fx`` (64-bit)
- ``host`` (with KVM only)
+- ``neoverse-n1`` (64-bit)
- ``max`` (same as ``host`` for KVM; best possible emulation with TCG)
Note that the default is ``cortex-a15``, so for an AArch64 guest you must
diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index 2ddde88f5e..dac8860f2d 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -146,6 +146,7 @@ static const char * const valid_cpus[] = {
ARM_CPU_TYPE_NAME("cortex-a57"),
ARM_CPU_TYPE_NAME("cortex-a72"),
ARM_CPU_TYPE_NAME("cortex-a76"),
+ ARM_CPU_TYPE_NAME("neoverse-n1"),
ARM_CPU_TYPE_NAME("max"),
};
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 12bc2318ec..da7e3ede56 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -204,6 +204,7 @@ static const char *valid_cpus[] = {
ARM_CPU_TYPE_NAME("cortex-a72"),
ARM_CPU_TYPE_NAME("cortex-a76"),
ARM_CPU_TYPE_NAME("a64fx"),
+ ARM_CPU_TYPE_NAME("neoverse-n1"),
ARM_CPU_TYPE_NAME("host"),
ARM_CPU_TYPE_NAME("max"),
};
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index adfe6b26be..04427e073f 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -259,6 +259,71 @@ static void aarch64_a76_initfn(Object *obj)
cpu->isar.mvfr2 = 0x00000043;
}
+static void aarch64_neoverse_n1_initfn(Object *obj)
+{
+ ARMCPU *cpu = ARM_CPU(obj);
+
+ cpu->dtb_compatible = "arm,neoverse-n1";
+ set_feature(&cpu->env, ARM_FEATURE_V8);
+ set_feature(&cpu->env, ARM_FEATURE_NEON);
+ set_feature(&cpu->env, ARM_FEATURE_GENERIC_TIMER);
+ set_feature(&cpu->env, ARM_FEATURE_AARCH64);
+ set_feature(&cpu->env, ARM_FEATURE_CBAR_RO);
+ set_feature(&cpu->env, ARM_FEATURE_EL2);
+ set_feature(&cpu->env, ARM_FEATURE_EL3);
+ set_feature(&cpu->env, ARM_FEATURE_PMU);
+
+ /* Ordered by B2.4 AArch64 registers by functional group */
+ cpu->clidr = 0x82000023;
+ cpu->ctr = 0x8444c004;
+ cpu->dcz_blocksize = 4;
+ cpu->isar.id_aa64dfr0 = 0x0000000110305408ull;
+ cpu->isar.id_aa64isar0 = 0x0000100010211120ull;
+ cpu->isar.id_aa64isar1 = 0x0000000000100001ull;
+ cpu->isar.id_aa64mmfr0 = 0x0000000000101125ull;
+ cpu->isar.id_aa64mmfr1 = 0x0000000010212122ull;
+ cpu->isar.id_aa64mmfr2 = 0x0000000000001011ull;
+ cpu->isar.id_aa64pfr0 = 0x1100000010111112ull; /* GIC filled in later */
+ cpu->isar.id_aa64pfr1 = 0x0000000000000020ull;
+ cpu->id_afr0 = 0x00000000;
+ cpu->isar.id_dfr0 = 0x04010088;
+ cpu->isar.id_isar0 = 0x02101110;
+ cpu->isar.id_isar1 = 0x13112111;
+ cpu->isar.id_isar2 = 0x21232042;
+ cpu->isar.id_isar3 = 0x01112131;
+ cpu->isar.id_isar4 = 0x00010142;
+ cpu->isar.id_isar5 = 0x01011121;
+ cpu->isar.id_isar6 = 0x00000010;
+ cpu->isar.id_mmfr0 = 0x10201105;
+ cpu->isar.id_mmfr1 = 0x40000000;
+ cpu->isar.id_mmfr2 = 0x01260000;
+ cpu->isar.id_mmfr3 = 0x02122211;
+ cpu->isar.id_mmfr4 = 0x00021110;
+ cpu->isar.id_pfr0 = 0x10010131;
+ cpu->isar.id_pfr1 = 0x00010000; /* GIC filled in later */
+ cpu->isar.id_pfr2 = 0x00000011;
+ cpu->midr = 0x414fd0c1; /* r4p1 */
+ cpu->revidr = 0;
+
+ /* From B2.23 CCSIDR_EL1 */
+ cpu->ccsidr[0] = 0x701fe01a; /* 64KB L1 dcache */
+ cpu->ccsidr[1] = 0x201fe01a; /* 64KB L1 icache */
+ cpu->ccsidr[2] = 0x70ffe03a; /* 1MB L2 cache */
+
+ /* From B2.98 SCTLR_EL3 */
+ cpu->reset_sctlr = 0x30c50838;
+
+ /* From B4.23 ICH_VTR_EL2 */
+ cpu->gic_num_lrs = 4;
+ cpu->gic_vpribits = 5;
+ cpu->gic_vprebits = 5;
+
+ /* From B5.1 AdvSIMD AArch64 register summary */
+ cpu->isar.mvfr0 = 0x10110222;
+ cpu->isar.mvfr1 = 0x13211111;
+ cpu->isar.mvfr2 = 0x00000043;
+}
+
void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp)
{
/*
@@ -948,6 +1013,7 @@ static const ARMCPUInfo aarch64_cpus[] = {
{ .name = "cortex-a72", .initfn = aarch64_a72_initfn },
{ .name = "cortex-a76", .initfn = aarch64_a76_initfn },
{ .name = "a64fx", .initfn = aarch64_a64fx_initfn },
+ { .name = "neoverse-n1", .initfn = aarch64_neoverse_n1_initfn },
{ .name = "max", .initfn = aarch64_max_initfn },
#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
{ .name = "host", .initfn = aarch64_host_initfn },
--
2.34.1
^ permalink raw reply related [flat|nested] 28+ messages in thread
* Re: [PATCH v5 01/24] target/arm: Handle cpreg registration for missing EL
2022-05-05 18:49 ` [PATCH v5 01/24] target/arm: Handle cpreg registration for missing EL Richard Henderson
@ 2022-05-06 11:22 ` Peter Maydell
0 siblings, 0 replies; 28+ messages in thread
From: Peter Maydell @ 2022-05-06 11:22 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Thu, 5 May 2022 at 20:06, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> More gracefully handle cpregs when EL2 and/or EL3 are missing.
> If the reg is entirely inaccessible, do not register it at all.
> If the reg is for EL2, and EL3 is present but EL2 is not,
> either discard, squash to res0, const, or keep unchanged.
>
> Per rule RJFFP, mark the 4 aarch32 hypervisor access registers
> with ARM_CP_EL3_NO_EL2_KEEP, and mark all of the EL2 address
> translation and tlb invalidation "regs" ARM_CP_EL3_NO_EL2_UNDEF.
> Mark the 2 virtualization processor id regs ARM_CP_EL3_NO_EL2_C_NZ.
>
> This will simplify cpreg registration for conditional arm features.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> + /*
> + * Eliminate registers that are not present because the EL is missing.
> + * Doing this here makes it easier to put all registers for a given
> + * feature into the same ARMCPRegInfo array and define them all at once.
> + */
> + make_const = false;
> + if (arm_feature(env, ARM_FEATURE_EL3)) {
> + /*
> + * An EL2 register without EL2 but with EL3 is (usually) RES0.
> + * See rule RJFFP in section D1.1.3 of DDI0487H.a.
> + */
> + int min_el = ctz32(r->access) / 2;
> + if (min_el == 2 && !arm_feature(env, ARM_FEATURE_EL2)) {
> + if (r->type & ARM_CP_EL3_NO_EL2_UNDEF) {
> + return;
> + }
> + make_const = !(r->type & ARM_CP_EL3_NO_EL2_KEEP);
> + }
> + } else {
> + CPAccessRights max_el = (arm_feature(env, ARM_FEATURE_EL2)
> + ? PL2_RW : PL1_RW);
> + if ((r->access & max_el) == 0) {
> + return;
> + }
I did wonder if we had any cases where an EL1-accessible register
is marked with CP_ALIAS and we are relying on an EL3 register
(not-guest-accessible but still kept in the hashtable CPReg)
to do the migration and reset for it. But I had a quick look
through and I don't think we do. (We definitely do have cases
where we have an AArch32 CP_ALIAS register that relies on the
AArch64 cpreginfo being in the hash table even when the CPU
doesn't implement AArch64.)
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 28+ messages in thread
* Re: [PATCH v5 02/24] target/arm: Drop EL3 no EL2 fallbacks
2022-05-05 18:49 ` [PATCH v5 02/24] target/arm: Drop EL3 no EL2 fallbacks Richard Henderson
@ 2022-05-06 11:36 ` Peter Maydell
0 siblings, 0 replies; 28+ messages in thread
From: Peter Maydell @ 2022-05-06 11:36 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Thu, 5 May 2022 at 20:15, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Drop el3_no_el2_cp_reginfo, el3_no_el2_v8_cp_reginfo,
> and the local vpidr_regs definition, and rely on the
> squasing to ARM_CP_CONST while registering.
"squashing"
This patch is a behaviour change, which I think is correct, but
it could do with being called out more clearly in the commit
message. Specifically, for v7 with EL3 but not EL2, we used to
register RAZ/WI versions of all the registers in el3_no_el2_cp_reginfo[].
After this change we won't, because we only register el2_cp_reginfo
on v8 no-EL2 CPUs. As it happens, this is correct, because
(as described in the v7A/v7R Arm ARM DDI0406C.d section B3.15.3)
v7 treats these as "PL2-mode system control registers" which are
not supposed to be implemented if the Virtualization Extensions
are not implemented. (There is a weird special case for CNTVOFF,
but luckily it boils down to "it's OK to just UNDEF it".) But
it is a change from what we previously did.
This would be a migration compat break except that we've had
a bug for years that we haven't got round to fixing where migration
of 32-bit CPUs with EL3 implemented doesn't work...
With an improved commit message:
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 28+ messages in thread
* Re: [PATCH v5 20/24] target/arm: Enable FEAT_CSV2_2 for -cpu max
2022-05-05 18:50 ` [PATCH v5 20/24] target/arm: Enable FEAT_CSV2_2 " Richard Henderson
@ 2022-05-06 12:12 ` Peter Maydell
0 siblings, 0 replies; 28+ messages in thread
From: Peter Maydell @ 2022-05-06 12:12 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Thu, 5 May 2022 at 20:40, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> There is no branch prediction in TCG, therefore there is no
> need to actually include the context number into the predictor.
> Therefore all we need to do is add the state for SCXTNUM_ELx.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> v2: Update emulation.rst; clear CSV2_FRAC; use decimal; tidy access_scxtnum.
> v3: Rely on EL3-no-EL2 squashing during registration.
> v5: Set SCTLR_EL1.TSCXT at user-only startup.
> ---
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 28+ messages in thread
end of thread, other threads:[~2022-05-06 12:14 UTC | newest]
Thread overview: 28+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-05-05 18:49 [PATCH v5 00/24] target/arm: Cleanups, new features, new cpus Richard Henderson
2022-05-05 18:49 ` [PATCH v5 01/24] target/arm: Handle cpreg registration for missing EL Richard Henderson
2022-05-06 11:22 ` Peter Maydell
2022-05-05 18:49 ` [PATCH v5 02/24] target/arm: Drop EL3 no EL2 fallbacks Richard Henderson
2022-05-06 11:36 ` Peter Maydell
2022-05-05 18:49 ` [PATCH v5 03/24] target/arm: Merge zcr reginfo Richard Henderson
2022-05-05 18:49 ` [PATCH v5 04/24] target/arm: Adjust definition of CONTEXTIDR_EL2 Richard Henderson
2022-05-05 18:49 ` [PATCH v5 05/24] target/arm: Move cortex impdef sysregs to cpu_tcg.c Richard Henderson
2022-05-05 18:49 ` [PATCH v5 06/24] target/arm: Update qemu-system-arm -cpu max to cortex-a57 Richard Henderson
2022-05-05 18:49 ` [PATCH v5 07/24] target/arm: Set ID_DFR0.PerfMon for qemu-system-arm -cpu max Richard Henderson
2022-05-05 18:49 ` [PATCH v5 08/24] target/arm: Split out aa32_max_features Richard Henderson
2022-05-05 18:49 ` [PATCH v5 09/24] target/arm: Annotate arm_max_initfn with FEAT identifiers Richard Henderson
2022-05-05 18:49 ` [PATCH v5 10/24] target/arm: Use field names for manipulating EL2 and EL3 modes Richard Henderson
2022-05-05 18:49 ` [PATCH v5 11/24] target/arm: Enable FEAT_Debugv8p2 for -cpu max Richard Henderson
2022-05-05 18:49 ` [PATCH v5 12/24] target/arm: Enable FEAT_Debugv8p4 " Richard Henderson
2022-05-05 18:49 ` [PATCH v5 13/24] target/arm: Add minimal RAS registers Richard Henderson
2022-05-05 18:49 ` [PATCH v5 14/24] target/arm: Enable SCR and HCR bits for RAS Richard Henderson
2022-05-05 18:49 ` [PATCH v5 15/24] target/arm: Implement virtual SError exceptions Richard Henderson
2022-05-05 18:49 ` [PATCH v5 16/24] target/arm: Implement ESB instruction Richard Henderson
2022-05-05 18:49 ` [PATCH v5 17/24] target/arm: Enable FEAT_RAS for -cpu max Richard Henderson
2022-05-05 18:50 ` [PATCH v5 18/24] target/arm: Enable FEAT_IESB " Richard Henderson
2022-05-05 18:50 ` [PATCH v5 19/24] target/arm: Enable FEAT_CSV2 " Richard Henderson
2022-05-05 18:50 ` [PATCH v5 20/24] target/arm: Enable FEAT_CSV2_2 " Richard Henderson
2022-05-06 12:12 ` Peter Maydell
2022-05-05 18:50 ` [PATCH v5 21/24] target/arm: Enable FEAT_CSV3 " Richard Henderson
2022-05-05 18:50 ` [PATCH v5 22/24] target/arm: Enable FEAT_DGH " Richard Henderson
2022-05-05 18:50 ` [PATCH v5 23/24] target/arm: Define cortex-a76 Richard Henderson
2022-05-05 18:50 ` [PATCH v5 24/24] target/arm: Define neoverse-n1 Richard Henderson
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