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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/smp.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/smp.c')
| -rw-r--r-- | arch/arm64/kernel/smp.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 824561ef6b8a..c94f4a6515c4 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -47,6 +47,7 @@ #include <asm/cpu.h> #include <asm/cputype.h> #include <asm/cpu_ops.h> +#include <asm/daifflags.h> #include <asm/mmu_context.h> #include <asm/numa.h> #include <asm/pgtable.h> @@ -370,10 +371,6 @@ void __cpu_die(unsigned int cpu) /* * Called from the idle thread for the CPU which has been shutdown. * - * Note that we disable IRQs here, but do not re-enable them - * before returning to the caller. This is also the behaviour - * of the other hotplug-cpu capable cores, so presumably coming - * out of idle fixes this. */ void cpu_die(void) { @@ -381,7 +378,7 @@ void cpu_die(void) idle_task_exit(); - local_irq_disable(); + local_daif_mask(); /* Tell __cpu_die() that this CPU is now safe to dispose of */ (void)cpu_report_death(); @@ -839,7 +836,7 @@ static void ipi_cpu_stop(unsigned int cpu) { set_cpu_online(cpu, false); - local_irq_disable(); + local_daif_mask(); while (1) cpu_relax(); |