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:
20230112102436.1913-7-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>
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.
- */
+ /* On syscall, PSTATE.ZA is preserved, PSTATE.SM is cleared. */
aarch64_set_svcr(env, 0, R_SVCR_SM_MASK);
- if (FIELD_EX64(env->svcr, SVCR, SM)) {
- arm_rebuild_hflags(env);
- }
ret = do_syscall(env,
env->xregs[8],
env->xregs[0],
/* Invoke the signal handler with both SM and ZA disabled. */
aarch64_set_svcr(env, 0, R_SVCR_SM_MASK | R_SVCR_ZA_MASK);
- if (env->svcr) {
- arm_rebuild_hflags(env);
- }
if (info) {
tswap_siginfo(&frame->info, info);
{
uint64_t change = (env->svcr ^ new) & mask;
+ if (change == 0) {
+ return;
+ }
env->svcr ^= change;
if (change & R_SVCR_SM_MASK) {
if (change & new & R_SVCR_ZA_MASK) {
memset(env->zarray, 0, sizeof(env->zarray));
}
+
+ arm_rebuild_hflags(env);
}
static void svcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
helper_set_pstate_sm(env, FIELD_EX64(value, SVCR, SM));
helper_set_pstate_za(env, FIELD_EX64(value, SVCR, ZA));
aarch64_set_svcr(env, value, -1);
- arm_rebuild_hflags(env);
}
static void smcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
void helper_set_pstate_sm(CPUARMState *env, uint32_t i)
{
- if (i == FIELD_EX64(env->svcr, SVCR, SM)) {
- return;
- }
aarch64_set_svcr(env, 0, R_SVCR_SM_MASK);
- arm_rebuild_hflags(env);
}
void helper_set_pstate_za(CPUARMState *env, uint32_t i)
{
- if (i == FIELD_EX64(env->svcr, SVCR, ZA)) {
- return;
- }
aarch64_set_svcr(env, 0, R_SVCR_ZA_MASK);
- arm_rebuild_hflags(env);
}
void helper_sme_zero(CPUARMState *env, uint32_t imm, uint32_t svl)