On 7/25/25 04:22, Peter Maydell wrote:
A recent change to the kernel (Linux commit b376108e1f88
"arm64/fpsimd: signal: Clear TPIDR2 when delivering signals") updated
the signal-handler entry code to always clear TPIDR2_EL0.
Ah, I missed seeing that.
/* Invoke the signal handler with both SM and ZA disabled. */
aarch64_set_svcr(env, 0, R_SVCR_SM_MASK | R_SVCR_ZA_MASK);
+ if (cpu_isar_feature(aa64_sme, env_archcpu(env))) {
+ env->cp15.tpidr2_el0 = 0;
+ }
You can omit the IF and unconditionally clear the memory.
Reviewed-by: Richard Henderson <[email protected]>
r~
