[PATCH v2] arm64/ptrace: Use system_supports_tpidr2() to check for TPIDR2 support

[Mark Brown]

We have a separate system_supports_tpidr2() to check for TPIDR2 support
but were using system_supports_sme() in tls_set(). While these are
currently identical let's use the specific check instead so we don't have
any surprises in future.

Reported-by: Will Deacon <will at kernel.org>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
v2:
 - Rebase onto v6.2-rc1.
---
 arch/arm64/kernel/ptrace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 2686ab157601..33d985bb2707 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -683,7 +683,7 @@ static int tls_set(struct task_struct *target, const struct user_regset *regset,
 	unsigned long tls[2];
 
 	tls[0] = target->thread.uw.tp_value;
-	if (system_supports_sme())
+	if (system_supports_tpidr2())
 		tls[1] = target->thread.tpidr2_el0;
 
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, tls, 0, count);
@@ -691,7 +691,7 @@ static int tls_set(struct task_struct *target, const struct user_regset *regset,
 		return ret;
 
 	target->thread.uw.tp_value = tls[0];
-	if (system_supports_sme())
+	if (system_supports_tpidr2())
 		target->thread.tpidr2_el0 = tls[1];
 
 	return ret;

---
base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2
change-id: 20221208-arm64-tpidr2-ptrace-feat-1295b8b23b1b

Best regards,
-- 
Mark Brown <broonie at kernel.org>