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kselftest/arm64: Move/add POE helpers to test_signals_utils.h

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In preparation to adding further POE signal tests, move
get_por_el0() to test_signals_utils.h and add set_por_el0().

Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Kevin Brodsky 2026-04-27 13:03:36 +01:00 committed by Will Deacon
parent 42c2195406
commit 925a082ec2
2 changed files with 16 additions and 15 deletions
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16
tools/testing/selftests/arm64/signal/test_signals_utils.h
View File

@ -57,6 +57,22 @@ static inline __attribute__((always_inline)) uint64_t get_gcspr_el0(void)
return val;
}
#define SYS_POR_EL0 "S3_3_C10_C2_4"
static inline uint64_t get_por_el0(void)
{
uint64_t val;
asm volatile("mrs %0, " SYS_POR_EL0 "\n" : "=r"(val));
return val;
}
static inline void set_por_el0(uint64_t val)
{
asm volatile("msr " SYS_POR_EL0 ", %0\n" :: "r"(val));
}
static inline bool feats_ok(struct tdescr *td)
{
if (td->feats_incompatible & td->feats_supported)

15
tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c
View File

@ -21,21 +21,6 @@ static union {
char buf[1024 * 128];
} context;
#define SYS_POR_EL0 "S3_3_C10_C2_4"
static uint64_t get_por_el0(void)
{
uint64_t val;
asm volatile(
"mrs %0, " SYS_POR_EL0 "\n"
: "=r"(val)
:
: );
return val;
}
int poe_present(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
{
struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context);