Merge tag 'efi_updates_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / drivers / firmware / efi / capsule.c

diff --git a/drivers/firmware/efi/capsule.c b/drivers/firmware/efi/capsule.c
index 43f6fe7..7684302 100644 (file)
--- a/drivers/firmware/efi/capsule.c
+++ b/drivers/firmware/efi/capsule.c
@@ -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);
        }