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arm64/ptrace: Use system_supports_tpidr2() to check for TPIDR2 support

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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@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221208-arm64-tpidr2-ptrace-feat-v2-1-3760c895a574@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown
2022-12-27 13:01:08 +00:00
committed by Catalin Marinas
parent b7bfaa761d
commit c3cdd54c61
1 changed files with 2 additions and 2 deletions
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arch/arm64/kernel/ptrace.c
+2 -2
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@@ -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;