On Fri, Aug 14, 2015 at 01:35:53PM +0100, fu....@linaro.org wrote:
> From: Tomasz Nowicki <tomasz.nowi...@linaro.org>
>
> This commit provides APEI arch-specific bits for aarch64
>
> Changelog:
> Fu Wei:
> Move arch_apei_flush_tlb_one() to arch/arm64/include/asm/apci.h.
> Delete arch/arm64/kernel/apei.c.
> Add "#ifdef CONFIG_ACPI_APEI" for "acpi_disable_cmcff".
>
> Signed-off-by: Tomasz Nowicki <tomasz.nowi...@linaro.org>
> Signed-off-by: Fu Wei <fu....@linaro.org>
> ---
> arch/arm64/Kconfig | 1 +
> arch/arm64/include/asm/acpi.h | 11 +++++++++++
> arch/arm64/kernel/acpi.c | 4 ++++
> 3 files changed, 16 insertions(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 318175f..6144c9d 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -3,6 +3,7 @@ config ARM64
> select ACPI_CCA_REQUIRED if ACPI
> select ACPI_GENERIC_GSI if ACPI
> select ACPI_REDUCED_HARDWARE_ONLY if ACPI
> + select HAVE_ACPI_APEI if ACPI
> select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
> select ARCH_HAS_ELF_RANDOMIZE
> select ARCH_HAS_GCOV_PROFILE_ALL
> diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
> index a17b623..ced6e25 100644
> --- a/arch/arm64/include/asm/acpi.h
> +++ b/arch/arm64/include/asm/acpi.h
> @@ -22,6 +22,7 @@
> #ifdef CONFIG_ACPI_APEI
> #include <linux/efi.h>
> #include <asm/pgtable.h>
> +#include <asm/tlbflush.h>
> #endif
>
> /* Macros for consistency checks of the GICC subtable of MADT */
> @@ -52,6 +53,9 @@ typedef u64 phys_cpuid_t;
> extern int acpi_disabled;
> extern int acpi_noirq;
> extern int acpi_pci_disabled;
> +#ifdef CONFIG_ACPI_APEI
> +extern int acpi_disable_cmcff;
> +#endif
>
> static inline void disable_acpi(void)
> {
> @@ -89,6 +93,13 @@ static inline bool acpi_has_cpu_in_madt(void)
> static inline void arch_fix_phys_package_id(int num, u32 slot) { }
> void __init acpi_init_cpus(void);
>
> +#ifdef CONFIG_ACPI_APEI
> +static inline void arch_apei_flush_tlb_one(unsigned long addr)
> +{
> + flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
> +}
> +#endif
Looking at the callers of this function, I suspect we could downgrade it
to a local CPU invalidation if we wanted. However, this isn't a hot-path
so it's fine to stay like it is for now.
Will
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