diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2020-09-10 18:38:51 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-10-01 15:31:00 +0100 |
| commit | 0ae0326b984e77a55c224b7863071bd3d8951231 (patch) | |
| tree | 2ec89f8faee13ce2fea173cb596ce4a0b3a1d2d5 /target/arm | |
| parent | 37a712a0f969ca2df7f01182409a6c4825cebfb5 (diff) | |
target/arm: Replace ARM_FEATURE_PXN with ID_MMFR0.VMSA check
The ARM_FEATURE_PXN bit indicates whether the CPU supports the PXN
bit in short-descriptor translation table format descriptors. This
is indicated by ID_MMFR0.VMSA being at least 0b0100. Replace the
feature bit with an ID register check, in line with our preference
for ID register checks over feature bits.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200910173855.4068-2-peter.maydell@linaro.org
Diffstat (limited to 'target/arm')
| -rw-r--r-- | target/arm/cpu.c | 1 | ||||
| -rw-r--r-- | target/arm/cpu.h | 15 | ||||
| -rw-r--r-- | target/arm/helper.c | 5 |
3 files changed, 17 insertions, 4 deletions
diff --git a/target/arm/cpu.c b/target/arm/cpu.c index a7643deab4..d13a7b8717 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -1588,7 +1588,6 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp) } if (arm_feature(env, ARM_FEATURE_LPAE)) { set_feature(env, ARM_FEATURE_V7MP); - set_feature(env, ARM_FEATURE_PXN); } if (arm_feature(env, ARM_FEATURE_CBAR_RO)) { set_feature(env, ARM_FEATURE_CBAR); diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 6036f61d60..14a673d8e9 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -1772,6 +1772,15 @@ FIELD(ID_ISAR6, FHM, 8, 4) FIELD(ID_ISAR6, SB, 12, 4) FIELD(ID_ISAR6, SPECRES, 16, 4) +FIELD(ID_MMFR0, VMSA, 0, 4) +FIELD(ID_MMFR0, PMSA, 4, 4) +FIELD(ID_MMFR0, OUTERSHR, 8, 4) +FIELD(ID_MMFR0, SHARELVL, 12, 4) +FIELD(ID_MMFR0, TCM, 16, 4) +FIELD(ID_MMFR0, AUXREG, 20, 4) +FIELD(ID_MMFR0, FCSE, 24, 4) +FIELD(ID_MMFR0, INNERSHR, 28, 4) + FIELD(ID_MMFR3, CMAINTVA, 0, 4) FIELD(ID_MMFR3, CMAINTSW, 4, 4) FIELD(ID_MMFR3, BPMAINT, 8, 4) @@ -1949,7 +1958,6 @@ enum arm_features { ARM_FEATURE_CACHE_DIRTY_REG, /* 1136/1176 cache dirty status register */ ARM_FEATURE_CACHE_BLOCK_OPS, /* v6 optional cache block operations */ ARM_FEATURE_MPIDR, /* has cp15 MPIDR */ - ARM_FEATURE_PXN, /* has Privileged Execute Never bit */ ARM_FEATURE_LPAE, /* has Large Physical Address Extension */ ARM_FEATURE_V8, ARM_FEATURE_AARCH64, /* supports 64 bit mode */ @@ -3615,6 +3623,11 @@ static inline bool isar_feature_aa32_vminmaxnm(const ARMISARegisters *id) return FIELD_EX32(id->mvfr2, MVFR2, FPMISC) >= 4; } +static inline bool isar_feature_aa32_pxn(const ARMISARegisters *id) +{ + return FIELD_EX32(id->id_mmfr0, ID_MMFR0, VMSA) >= 4; +} + static inline bool isar_feature_aa32_pan(const ARMISARegisters *id) { return FIELD_EX32(id->id_mmfr3, ID_MMFR3, PAN) != 0; diff --git a/target/arm/helper.c b/target/arm/helper.c index 88bd9dd35d..ab6ca23b64 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -10537,6 +10537,7 @@ static bool get_phys_addr_v6(CPUARMState *env, uint32_t address, target_ulong *page_size, ARMMMUFaultInfo *fi) { CPUState *cs = env_cpu(env); + ARMCPU *cpu = env_archcpu(env); int level = 1; uint32_t table; uint32_t desc; @@ -10563,7 +10564,7 @@ static bool get_phys_addr_v6(CPUARMState *env, uint32_t address, goto do_fault; } type = (desc & 3); - if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) { + if (type == 0 || (type == 3 && !cpu_isar_feature(aa32_pxn, cpu))) { /* Section translation fault, or attempt to use the encoding * which is Reserved on implementations without PXN. */ @@ -10605,7 +10606,7 @@ static bool get_phys_addr_v6(CPUARMState *env, uint32_t address, pxn = desc & 1; ns = extract32(desc, 19, 1); } else { - if (arm_feature(env, ARM_FEATURE_PXN)) { + if (cpu_isar_feature(aa32_pxn, cpu)) { pxn = (desc >> 2) & 1; } ns = extract32(desc, 3, 1); |