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| author | Mark Rutland <mark.rutland@arm.com> | 2021-06-07 10:46:07 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-06-07 11:35:54 +0100 |
| commit | bb8e93a287a5f5f10fe7a9d8f612f6105c9622ef (patch) | |
| tree | 9ccae9d6cae082fe12bcd4bb6a68068a3033de11 /arch/arm64/kernel/entry-common.c | |
| parent | f7c706f0391d7894d1ae2d28cb2d5446f5ec59ad (diff) | |
| download | linux-bb8e93a287a5f5f10fe7a9d8f612f6105c9622ef.tar.gz | |
arm64: entry: convert SError handlers to C
For various reasons we'd like to convert the bulk of arm64's exception
triage logic to C. As a step towards that, this patch converts the EL1
and EL0 SError triage logic to C.
Separate C functions are added for the native and compat cases so that
in subsequent patches we can handle native/compat differences in C.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210607094624.34689-4-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/entry-common.c')
| -rw-r--r-- | arch/arm64/kernel/entry-common.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 02be1517e08f..3b7943721077 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -279,6 +279,16 @@ asmlinkage void noinstr el1_sync_handler(struct pt_regs *regs) } } +asmlinkage void noinstr el1_error_handler(struct pt_regs *regs) +{ + unsigned long esr = read_sysreg(esr_el1); + + local_daif_restore(DAIF_ERRCTX); + arm64_enter_nmi(regs); + do_serror(regs, esr); + arm64_exit_nmi(regs); +} + asmlinkage void noinstr enter_from_user_mode(void) { lockdep_hardirqs_off(CALLER_ADDR0); @@ -468,6 +478,23 @@ asmlinkage void noinstr el0_sync_handler(struct pt_regs *regs) } } +static void __el0_error_handler_common(struct pt_regs *regs) +{ + unsigned long esr = read_sysreg(esr_el1); + + enter_from_user_mode(); + local_daif_restore(DAIF_ERRCTX); + arm64_enter_nmi(regs); + do_serror(regs, esr); + arm64_exit_nmi(regs); + local_daif_restore(DAIF_PROCCTX); +} + +asmlinkage void noinstr el0_error_handler(struct pt_regs *regs) +{ + __el0_error_handler_common(regs); +} + #ifdef CONFIG_COMPAT static void noinstr el0_cp15(struct pt_regs *regs, unsigned long esr) { @@ -526,4 +553,9 @@ asmlinkage void noinstr el0_sync_compat_handler(struct pt_regs *regs) el0_inv(regs, esr); } } + +asmlinkage void noinstr el0_error_compat_handler(struct pt_regs *regs) +{ + __el0_error_handler_common(regs); +} #endif /* CONFIG_COMPAT */ |