diff options
| author | James Morse <james.morse@arm.com> | 2017-11-02 12:12:34 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-11-02 15:55:40 +0000 |
| commit | 0fbeb318754860b37150fd42c2058d636a431426 (patch) | |
| tree | f2031ebae16d0c649f59b4e0b3400824c35ce68a /arch/arm64/include/asm/assembler.h | |
| parent | c10f0d06ad2652913acd21a630f4c2a97cebbfbd (diff) | |
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/include/asm/assembler.h')
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index 3128a9ca5701..a4aa22241dd1 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -32,6 +32,23 @@ #include <asm/ptrace.h> #include <asm/thread_info.h> + .macro save_and_disable_daif, flags + mrs \flags, daif + msr daifset, #0xf + .endm + + .macro disable_daif + msr daifset, #0xf + .endm + + .macro enable_daif + msr daifclr, #0xf + .endm + + .macro restore_daif, flags:req + msr daif, \flags + .endm + /* * Enable and disable interrupts. */ |