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target/arm/sme: Reset ZA state in aarch64_set_svcr()

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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230112102436.1913-6-philmd@linaro.org
Message-Id: <20230112004322.161330-1-richard.henderson@linaro.org>
[PMD: Split patch in multiple tiny steps]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2023-01-12 11:24:34 +01:00 committed by Peter Maydell
parent 7f2a01e736
commit fccb49182e
2 changed files with 12 additions and 12 deletions
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12
target/arm/helper.c
View File

@ -6743,6 +6743,18 @@ void aarch64_set_svcr(CPUARMState *env, uint64_t new, uint64_t mask)
if (change & R_SVCR_SM_MASK) {
arm_reset_sve_state(env);
}
/*
* ResetSMEState.
*
* SetPSTATE_ZA zeros on enable and disable. We can zero this only
* on enable: while disabled, the storage is inaccessible and the
* value does not matter. We're not saving the storage in vmstate
* when disabled either.
*/
if (change & new & R_SVCR_ZA_MASK) {
memset(env->zarray, 0, sizeof(env->zarray));
}
}
static void svcr_write(CPUARMState *env, const ARMCPRegInfo *ri,

12
target/arm/sme_helper.c
View File

@ -44,18 +44,6 @@ void helper_set_pstate_za(CPUARMState *env, uint32_t i)
return;
}
aarch64_set_svcr(env, 0, R_SVCR_ZA_MASK);
/*
* ResetSMEState.
*
* SetPSTATE_ZA zeros on enable and disable. We can zero this only
* on enable: while disabled, the storage is inaccessible and the
* value does not matter. We're not saving the storage in vmstate
* when disabled either.
*/
if (i) {
memset(env->zarray, 0, sizeof(env->zarray));
}
arm_rebuild_hflags(env);
}