diff options
| author | James Morse <james.morse@arm.com> | 2017-11-02 12:12:36 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-11-02 15:55:41 +0000 |
| commit | 41bd5b5d22b77c7300df2a2fa5397cbe785189b4 (patch) | |
| tree | b6a110cae9e3ec6bd49b858675212666f72f4a06 /arch/arm64/kernel | |
| parent | 65be7a1b799f11ff16f4c154ba4cf82eeb722ec7 (diff) | |
arm64: Move the async/fiq helpers to explicitly set process context flags
Remove the local_{async,fiq}_{en,dis}able macros as they don't respect
our newly defined order and are only used to set the flags for process
context when we bring CPUs online.
Add a helper to do this. The IRQ flag varies as we want it masked on
the boot CPU until we are ready to handle interrupts.
The boot CPU unmasks SError during early boot once it can print an error
message. If we can print an error message about SError, we can do the
same for FIQ. Debug exceptions are already enabled by __cpu_setup(),
which has also configured MDSCR_EL1 to disable MDE and KDE.
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')
| -rw-r--r-- | arch/arm64/kernel/setup.c | 8 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 3 |
2 files changed, 6 insertions, 5 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 4bab73e80e33..30ad2f085d1f 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -47,6 +47,7 @@ #include <asm/fixmap.h> #include <asm/cpu.h> #include <asm/cputype.h> +#include <asm/daifflags.h> #include <asm/elf.h> #include <asm/cpufeature.h> #include <asm/cpu_ops.h> @@ -259,10 +260,11 @@ void __init setup_arch(char **cmdline_p) parse_early_param(); /* - * Unmask asynchronous aborts after bringing up possible earlycon. - * (Report possible System Errors once we can report this occurred) + * Unmask asynchronous aborts and fiq after bringing up possible + * earlycon. (Report possible System Errors once we can report this + * occurred). */ - local_async_enable(); + local_daif_restore(DAIF_PROCCTX_NOIRQ); /* * TTBR0 is only used for the identity mapping at this stage. Make it diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index c94f4a6515c4..551eb07c53b6 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -274,8 +274,7 @@ asmlinkage void secondary_start_kernel(void) set_cpu_online(cpu, true); complete(&cpu_running); - local_irq_enable(); - local_async_enable(); + local_daif_restore(DAIF_PROCCTX); /* * OK, it's off to the idle thread for us |