efi: capsule: clean scatter-gather entries from the D-cache (4dbe44fb) · Commits · 戴 / test

arch/arm/include/asm/efi.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -93,4 +93,9 @@ struct efi_arm_entry_state {
		u32 sctlr_after_ebs;
		};

		static inline void efi_capsule_flush_cache_range(void *addr, int size)
		{
		__cpuc_flush_dcache_area(addr, size);
		}

		#endif /* _ASM_ARM_EFI_H */

+5 −0

Original line number	Diff line number	Diff line
		@@ -141,4 +141,9 @@ static inline void efi_set_pgd(struct mm_struct *mm)
		void efi_virtmap_load(void);
		void efi_virtmap_unload(void);

		static inline void efi_capsule_flush_cache_range(void *addr, int size)
		{
		__flush_dcache_area(addr, size);
		}

		#endif /* _ASM_EFI_H */

+12 −0

Original line number	Diff line number	Diff line
		@@ -12,6 +12,7 @@
		#include <linux/highmem.h>
		#include <linux/efi.h>
		#include <linux/vmalloc.h>
		#include <asm/efi.h>
		#include <asm/io.h>

		typedef struct {
		@@ -265,6 +266,17 @@ int efi_capsule_update(efi_capsule_header_t capsule, phys_addr_t pages)
		else
		sglist[j].data = page_to_phys(sg_pages[i + 1]);

		#if defined(CONFIG_ARM) \|\| defined(CONFIG_ARM64)
		/*
		* At runtime, the firmware has no way to find out where the
		* sglist elements are mapped, if they are mapped in the first
		* place. Therefore, on architectures that can only perform
		* cache maintenance by virtual address, the firmware is unable
		* to perform this maintenance, and so it is up to the OS to do
		* it instead.
		*/
		efi_capsule_flush_cache_range(sglist, PAGE_SIZE);
		#endif
		kunmap_atomic(sglist);
		}