diff options
| author | Mark Brown <broonie@kernel.org> | 2022-06-07 14:28:57 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-06-23 18:22:44 +0100 |
| commit | d69d564964872f52c4a8f0db172d842eaf3b84cf (patch) | |
| tree | be7531263167a1b95e57b1ae571987f5f00b0bcf /arch/arm64/include/asm/cpu.h | |
| parent | a111daf0c53ae91e71fd2bfe7497862d14132e3e (diff) | |
arm64/sme: Expose SMIDR through sysfs
We currently expose MIDR and REVID to userspace through sysfs to enable it
to make decisions based on the specific implementation. Since SME supports
implementations where streaming mode is provided by a separate hardware
unit called a SMCU it provides a similar ID register SMIDR. Expose it to
userspace via sysfs when the system supports SME along with the other ID
registers.
Since we disable the SME priority mapping feature if it is supported by
hardware we currently mask out the SMPS bit which reports that it is
supported.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220607132857.1358361-1-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/cpu.h')
| -rw-r--r-- | arch/arm64/include/asm/cpu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpu.h b/arch/arm64/include/asm/cpu.h index 115cdec1ae87..fd7a92219eea 100644 --- a/arch/arm64/include/asm/cpu.h +++ b/arch/arm64/include/asm/cpu.h @@ -46,6 +46,7 @@ struct cpuinfo_arm64 { u64 reg_midr; u64 reg_revidr; u64 reg_gmid; + u64 reg_smidr; u64 reg_id_aa64dfr0; u64 reg_id_aa64dfr1; |