On Wed, Jul 15, 2015 at 01:31:55AM +0100, Jonathan (Zhixiong) Zhang wrote:
From: "Jonathan (Zhixiong) Zhang" zjzhang@codeaurora.org
If the physical address has memory attributes defined by EFI memmap as EFI_MEMORY_UC, the page protection type is PROT_DEVICE_nGnRE. Otherwise, the page protection type is PAGE_KERNEL.
Signed-off-by: Jonathan (Zhixiong) Zhang zjzhang@codeaurora.org
arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/apei.c | 27 +++++++++++++++++++++++++++ 2 files changed, 28 insertions(+) create mode 100644 arch/arm64/kernel/apei.c
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 426d0763c81b..c135f1e4e3b8 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -36,6 +36,7 @@ arm64-obj-$(CONFIG_EFI) += efi.o efi-stub.o efi-entry.o arm64-obj-$(CONFIG_PCI) += pci.o arm64-obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o arm64-obj-$(CONFIG_ACPI) += acpi.o +arm64-obj-$(CONFIG_ACPI_APEI) += apei.o obj-y += $(arm64-obj-y) vdso/ obj-m += $(arm64-obj-m) diff --git a/arch/arm64/kernel/apei.c b/arch/arm64/kernel/apei.c new file mode 100644 index 000000000000..9c6b62f40ad7 --- /dev/null +++ b/arch/arm64/kernel/apei.c @@ -0,0 +1,27 @@ +/*
- Arch-specific APEI-related functions.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- */
+#include <acpi/apei.h>
+#include <linux/efi.h>
+#include <asm/pgtable.h>
+pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) +{
- if (efi_mem_attributes(addr) & EFI_MEMORY_UC)
return PROT_DEVICE_nGnRE;
- else
return PAGE_KERNEL;
+}
Do we really need a new file and out-of-line call for this?
Will