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authorJonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>2015-09-04 16:11:41 +0300
committerIngo Molnar <mingo@kernel.org>2015-09-14 12:40:03 +0300
commit89e44b51cc0db50ea4b5bbb5d582c4db88bbaed8 (patch)
tree0a47165178fb3130382db1ebfc1516537ea8623f /arch/arm64/include/asm/acpi.h
parent8d446c8647c9ab8fcb45a8fc7dbbafe1f83aa2f3 (diff)
downloadlinux-89e44b51cc0db50ea4b5bbb5d582c4db88bbaed8.tar.xz
arm64, acpi/apei: Implement arch_apei_get_mem_attributes()
Table 8 of UEFI 2.5 section 2.3.6.1 defines mappings from EFI memory types to MAIR attribute encodings for arm64. If the physical address has memory attributes defined by EFI memmap as EFI_MEMORY_[UC|WC|WT], return approprate page protection type according to the UEFI spec. Otherwise, return PAGE_KERNEL. Signed-off-by: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> [ Small stylistic tweaks. ] Reviewed-by: Matt Fleming <matt.fleming@intel.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Hanjun Guo <hanjun.guo@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Link: http://lkml.kernel.org/r/1441372302-23242-2-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/acpi.h')
-rw-r--r--arch/arm64/include/asm/acpi.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index 406485ed110a..5aa892a12a0d 100644
--- a/arch/arm64/include/asm/acpi.h
+++ b/arch/arm64/include/asm/acpi.h
@@ -92,4 +92,9 @@ static inline const char *acpi_get_enable_method(int cpu)
{
return acpi_psci_present() ? "psci" : NULL;
}
+
+#ifdef CONFIG_ACPI_APEI
+pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
+#endif
+
#endif /*_ASM_ACPI_H*/