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target/arm/sme: Introduce 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: 20230112102436.1913-4-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 11:24:32 +01:00 • committed by Peter Maydell
parent 3c9ee54894
commit 2a8af38259
5 changed files with 13 additions and 4 deletions
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2
linux-user/aarch64/cpu_loop.c
View file

@ -93,8 +93,8 @@ void cpu_loop(CPUARMState *env)
* On syscall, PSTATE.ZA is preserved, along with the ZA matrix.
* PSTATE.SM is cleared, per SMSTOP, which does ResetSVEState.
*/
aarch64_set_svcr(env, 0, R_SVCR_SM_MASK);
if (FIELD_EX64(env->svcr, SVCR, SM)) {
env->svcr = FIELD_DP64(env->svcr, SVCR, SM, 0);
arm_rebuild_hflags(env);
arm_reset_sve_state(env);
}

2
linux-user/aarch64/signal.c
View file

@ -669,11 +669,11 @@ static void target_setup_frame(int usig, struct target_sigaction *ka,
* Invoke the signal handler with both SM and ZA disabled.
* When clearing SM, ResetSVEState, per SMSTOP.
*/
aarch64_set_svcr(env, 0, R_SVCR_SM_MASK | R_SVCR_ZA_MASK);
if (FIELD_EX64(env->svcr, SVCR, SM)) {
arm_reset_sve_state(env);
}
if (env->svcr) {
env->svcr = 0;
arm_rebuild_hflags(env);
}