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Allow ARMv8 SCR.SMD updates

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Updated scr_write to always allow updates to the SCR.SMD bit on ARMv8
regardless of whether virtualization (EL2) is enabled or not.

Backports commit 4eb276408363aef5435a72a8e818f24220b5edd0 from qemu
This commit is contained in:
Sergey Fedorov 2018-02-12 20:48:13 -05:00 committed by Lioncash
parent f748c278b2
commit 96a99a1bbe
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 3 additions and 1 deletions
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4
qemu/target-arm/helper.c
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@ -696,8 +696,10 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
* supported if EL2 exists. The bit is UNK/SBZP when * supported if EL2 exists. The bit is UNK/SBZP when
* EL2 is unavailable. In QEMU ARMv7, we force it to always zero * EL2 is unavailable. In QEMU ARMv7, we force it to always zero
* when EL2 is unavailable. * when EL2 is unavailable.
* On ARMv8, this bit is always available.
*/ */
if (arm_feature(env, ARM_FEATURE_V7)) { if (arm_feature(env, ARM_FEATURE_V7) &&
!arm_feature(env, ARM_FEATURE_V8)) {
valid_mask &= ~SCR_SMD; valid_mask &= ~SCR_SMD;
} }
} }