On Tue, 28 Jun 2022 at 06:26, Richard Henderson
<richard.hender...@linaro.org> wrote:
>
> Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
> ---
> linux-user/aarch64/cpu_loop.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c
> index 3b273f6299..4af6996d57 100644
> --- a/linux-user/aarch64/cpu_loop.c
> +++ b/linux-user/aarch64/cpu_loop.c
> @@ -89,6 +89,15 @@ void cpu_loop(CPUARMState *env)
>
> switch (trapnr) {
> case EXCP_SWI:
> + /*
> + * On syscall, PSTATE.ZA is preserved, along with the ZA matrix.
> + * PSTATE.SM is cleared, per SMSTOP, which does ResetSVEState.
> + */
> + 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);
> + }
> ret = do_syscall(env,
> env->xregs[8],
> env->xregs[0],
> --
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
thanks
-- PMM
