diff options
| -rw-r--r-- | Documentation/arch/arm64/sme.rst | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/signal.c | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/arch/arm64/sme.rst b/Documentation/arch/arm64/sme.rst index b2fa01f85cb5..3a98aed92732 100644 --- a/Documentation/arch/arm64/sme.rst +++ b/Documentation/arch/arm64/sme.rst @@ -115,7 +115,7 @@ be zeroed. 5. Signal handling ------------------- -* Signal handlers are invoked with streaming mode and ZA disabled. +* Signal handlers are invoked with PSTATE.SM=0, PSTATE.ZA=0, and TPIDR2_EL0=0. * A new signal frame record TPIDR2_MAGIC is added formatted as a struct tpidr2_context to allow access to TPIDR2_EL0 from signal handlers. diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c index 73f1ab56d81b..48d3c0129dad 100644 --- a/arch/arm64/kernel/signal.c +++ b/arch/arm64/kernel/signal.c @@ -1479,6 +1479,7 @@ static int setup_return(struct pt_regs *regs, struct ksignal *ksig, } current->thread.svcr &= ~(SVCR_ZA_MASK | SVCR_SM_MASK); + write_sysreg_s(0, SYS_TPIDR2_EL0); } return 0; |