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| author |   Vincenzo Frascino <vincenzo.frascino@arm.com> | 2021-03-15 13:20:11 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2021-04-11 10:55:30 +0100 |
| commit | f3b7deef8dcaf84fd659108ae300626ea5420f87 (patch) | |
| tree | 78e07172909ac4406713dbd9e31b182e475ac759 /Documentation | |
| parent | Linux 5.12-rc3 (diff) | |
| download | linux-dev-f3b7deef8dcaf84fd659108ae300626ea5420f87.tar.xz linux-dev-f3b7deef8dcaf84fd659108ae300626ea5420f87.zip | |
arm64: mte: Add asynchronous mode support
MTE provides an asynchronous mode for detecting tag exceptions. In
particular instead of triggering a fault the arm64 core updates a
register which is checked by the kernel after the asynchronous tag
check fault has occurred.
Add support for MTE asynchronous mode.
The exception handling mechanism will be added with a future patch.
Note: KASAN HW activates async mode via kasan.mode kernel parameter.
The default mode is set to synchronous.
The code that verifies the status of TFSR_EL1 will be added with a
future patch.
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lore.kernel.org/r/20210315132019.33202-2-vincenzo.frascino@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions