diff options
| author | Mark Brown <broonie@kernel.org> | 2025-06-11 17:28:13 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2025-06-12 17:18:01 +0100 |
| commit | d2be3270f40b1330f8c1c9512c59dd085a758ac0 (patch) | |
| tree | 5ecaa259332b2c35baab51bf291f3c5993cf4427 | |
| parent | 650768c512faba8070bf4cfbb28c95eb5cd203f3 (diff) | |
arm64/gcs: Don't call gcs_free() during flush_gcs()
Currently we call gcs_free() during flush_gcs() to reset the thread
state for GCS. This includes unmapping any kernel allocated GCS, but
this is redundant when doing a flush_thread() since we are
reinitialising the thread memory too. Inline the reinitialisation of the
thread struct.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20250611-arm64-gcs-flush-thread-v1-1-cc26feeddabd@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | arch/arm64/kernel/process.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index a5ca15daeb8a..5954cec19660 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -288,7 +288,9 @@ static void flush_gcs(void) if (!system_supports_gcs()) return; - gcs_free(current); + current->thread.gcspr_el0 = 0; + current->thread.gcs_base = 0; + current->thread.gcs_size = 0; current->thread.gcs_el0_mode = 0; write_sysreg_s(GCSCRE0_EL1_nTR, SYS_GCSCRE0_EL1); write_sysreg_s(0, SYS_GCSPR_EL0); |