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| author | James Morse <james.morse@arm.com> | 2017-11-02 13:12:34 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-11-02 16:55:40 +0100 |
| commit | 0fbeb318754860b37150fd42c2058d636a431426 (patch) | |
| tree | f2031ebae16d0c649f59b4e0b3400824c35ce68a /arch/arm64/kernel/machine_kexec.c | |
| parent | arm64: suspend: remove useless included file (diff) | |
| download | linux-0fbeb318754860b37150fd42c2058d636a431426.tar.xz linux-0fbeb318754860b37150fd42c2058d636a431426.zip | |
arm64: explicitly mask all exceptions
There are a few places where we want to mask all exceptions. Today we
do this in a piecemeal fashion, typically we expect the caller to
have masked irqs and the arch code masks debug exceptions, ignoring
serror which is probably masked.
Make it clear that 'mask all exceptions' is the intention by adding
helpers to do exactly that.
This will let us unmask SError without having to add 'oh and SError'
to these paths.
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Julien Thierry <julien.thierry@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/machine_kexec.c')
| -rw-r--r-- | arch/arm64/kernel/machine_kexec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 11121f608eb5..f76ea92dff91 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -18,6 +18,7 @@ #include <asm/cacheflush.h> #include <asm/cpu_ops.h> +#include <asm/daifflags.h> #include <asm/memory.h> #include <asm/mmu.h> #include <asm/mmu_context.h> @@ -195,8 +196,7 @@ void machine_kexec(struct kimage *kimage) pr_info("Bye!\n"); - /* Disable all DAIF exceptions. */ - asm volatile ("msr daifset, #0xf" : : : "memory"); + local_daif_mask(); /* * cpu_soft_restart will shutdown the MMU, disable data caches, then |