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| author | Richard Henderson | 2020-06-26 05:31:00 +0200 |
|---|---|---|
| committer | Peter Maydell | 2020-06-26 15:31:11 +0200 |
| commit | 252e8c69669599b4bcff802df300726300292f47 (patch) | |
| tree | 0ba5ce6e95dc426838678822db3c46640d5f0a9e | |
| parent | target/arm: Add isar tests for mte (diff) | |
| download | qemu-252e8c69669599b4bcff802df300726300292f47.tar.gz qemu-252e8c69669599b4bcff802df300726300292f47.tar.xz qemu-252e8c69669599b4bcff802df300726300292f47.zip | |
target/arm: Improve masking of SCR RES0 bits
Protect reads of aa64 id registers with ARM_CP_STATE_AA64.
Use this as a simpler test than arm_el_is_aa64, since EL3
cannot change mode.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200626033144.790098-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target/arm/helper.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 972a766730..a29f0a28d8 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -2011,9 +2011,16 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) uint32_t valid_mask = 0x3fff; ARMCPU *cpu = env_archcpu(env); - if (arm_el_is_aa64(env, 3)) { + if (ri->state == ARM_CP_STATE_AA64) { value |= SCR_FW | SCR_AW; /* these two bits are RES1. */ valid_mask &= ~SCR_NET; + + if (cpu_isar_feature(aa64_lor, cpu)) { + valid_mask |= SCR_TLOR; + } + if (cpu_isar_feature(aa64_pauth, cpu)) { + valid_mask |= SCR_API | SCR_APK; + } } else { valid_mask &= ~(SCR_RW | SCR_ST); } @@ -2032,12 +2039,6 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) valid_mask &= ~SCR_SMD; } } - if (cpu_isar_feature(aa64_lor, cpu)) { - valid_mask |= SCR_TLOR; - } - if (cpu_isar_feature(aa64_pauth, cpu)) { - valid_mask |= SCR_API | SCR_APK; - } /* Clear all-context RES0 bits. */ value &= valid_mask; |