diff options
| author |   Vincenzo Frascino <vincenzo.frascino@arm.com> | 2021-03-15 13:20:18 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2021-04-11 10:56:40 +0100 |
| commit | eab0e6e17d876381b4d47996eef3b5fd46ea4011 (patch) | |
| tree | 4f7cb7317d8fc663f009db7a37b6ff4a9a2eac54 /arch/arm64/kernel/suspend.c | |
| parent | arm64: mte: Enable async tag check fault (diff) | |
| download | linux-dev-eab0e6e17d876381b4d47996eef3b5fd46ea4011.tar.xz linux-dev-eab0e6e17d876381b4d47996eef3b5fd46ea4011.zip | |
arm64: mte: Report async tag faults before suspend
When MTE async mode is enabled TFSR_EL1 contains the accumulative
asynchronous tag check faults for EL1 and EL0.
During the suspend/resume operations the firmware might perform some
operations that could change the state of the register resulting in
a spurious tag check fault report.
Report asynchronous tag faults before suspend and clear the TFSR_EL1
register after resume to prevent this to happen.
Cc: Will Deacon <will@kernel.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.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/20210315132019.33202-9-vincenzo.frascino@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/kernel/suspend.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c index d7564891ffe1..6fdc8292b4f5 100644 --- a/arch/arm64/kernel/suspend.c +++ b/arch/arm64/kernel/suspend.c @@ -91,6 +91,9 @@ int cpu_suspend(unsigned long arg, int (*fn)(unsigned long)) unsigned long flags; struct sleep_stack_data state; + /* Report any MTE async fault before going to suspend */ + mte_suspend_enter(); + /* * From this point debug exceptions are disabled to prevent * updates to mdscr register (saved and restored along with |