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| author | Peter Collingbourne <pcc@google.com> | 2021-07-27 22:52:59 +0200 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-07-28 19:39:26 +0200 |
| commit | 80c7c36fb3ddea8e06f75822bfb7634f64d0edcb (patch) | |
| tree | cd67067a9cdc3dc8211aaf0238834abf37925613 /Documentation/ABI/testing/sysfs-devices-system-cpu | |
| parent | arm64: mte: introduce a per-CPU tag checking mode preference (diff) | |
| download | linux-80c7c36fb3ddea8e06f75822bfb7634f64d0edcb.tar.xz linux-80c7c36fb3ddea8e06f75822bfb7634f64d0edcb.zip | |
Documentation: document the preferred tag checking mode feature
Document the functionality added in the previous patches.
Link: https://linux-review.googlesource.com/id/I48217cc3e8b8da33abc08cbaddc11cf4360a1b86
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210727205300.2554659-6-pcc@google.com
Acked-by: Will Deacon <will@kernel.org>
[catalin.marinas@arm.com: clarify that the change happens on task scheduling]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-devices-system-cpu')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-system-cpu | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 160b10c029c0..edb19b31d710 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -640,3 +640,20 @@ Description: SPURR ticks for cpuX when it was idle. This sysfs interface exposes the number of SPURR ticks for cpuX when it was idle. + +What: /sys/devices/system/cpu/cpuX/mte_tcf_preferred +Date: July 2021 +Contact: Linux ARM Kernel Mailing list <linux-arm-kernel@lists.infradead.org> +Description: Preferred MTE tag checking mode + + When a user program specifies more than one MTE tag checking + mode, this sysfs node is used to specify which mode should + be preferred when scheduling a task on that CPU. Possible + values: + + ================ ============================================== + "sync" Prefer synchronous mode + "async" Prefer asynchronous mode + ================ ============================================== + + See also: Documentation/arm64/memory-tagging-extension.rst |