diff options
| author | Will Deacon <will.deacon@arm.com> | 2015-10-06 18:46:23 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-10-07 11:45:27 +0100 |
| commit | 8e63d38876691756f9bc6930850f1fb77809be1b (patch) | |
| tree | 74f5a739675a90c71d1f07e937c2e3f512781b7e /arch/arm64/kernel | |
| parent | fa7aae8a4257e6be7051420dac1f150c1eef721b (diff) | |
arm64: flush: use local TLB and I-cache invalidation
There are a number of places where a single CPU is running with a
private page-table and we need to perform maintenance on the TLB and
I-cache in order to ensure correctness, but do not require the operation
to be broadcast to other CPUs.
This patch adds local variants of tlb_flush_all and __flush_icache_all
to support these use-cases and updates the callers respectively.
__local_flush_icache_all also implies an isb, since it is intended to be
used synchronously.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/efi.c | 4 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/suspend.c | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index 13671a9cf016..4d12926ea40d 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -344,9 +344,9 @@ static void efi_set_pgd(struct mm_struct *mm) else cpu_switch_mm(mm->pgd, mm); - flush_tlb_all(); + local_flush_tlb_all(); if (icache_is_aivivt()) - __flush_icache_all(); + __local_flush_icache_all(); } void efi_virtmap_load(void) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index dbdaacddd9a5..fdd4d4dbd64f 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -152,7 +152,7 @@ asmlinkage void secondary_start_kernel(void) * point to zero page to avoid speculatively fetching new entries. */ cpu_set_reserved_ttbr0(); - flush_tlb_all(); + local_flush_tlb_all(); cpu_set_default_tcr_t0sz(); preempt_disable(); diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c index 8297d502217e..3c5e4e6dcf68 100644 --- a/arch/arm64/kernel/suspend.c +++ b/arch/arm64/kernel/suspend.c @@ -90,7 +90,7 @@ int cpu_suspend(unsigned long arg, int (*fn)(unsigned long)) else cpu_switch_mm(mm->pgd, mm); - flush_tlb_all(); + local_flush_tlb_all(); /* * Restore per-cpu offset before any kernel |