diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2022-07-08 20:45:29 +0530 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2022-07-11 13:43:51 +0100 |
| commit | 2a98579711cfba611fbf2afdba6783c35c7d9850 (patch) | |
| tree | 16c4630508060e71a903c54dd9d9e289630fff2f /linux-user | |
| parent | 95aa4fdd58c50ba1d800bb106d73ef8a656e016e (diff) | |
linux-user/aarch64: Reset PSTATE.SM on syscalls
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-35-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/aarch64/cpu_loop.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c index f7ef36cd9f..9875d609a9 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], |