From: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Device mappings need to be emualted by the VMM so must be mapped shared
with the host.
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Signed-off-by: Steven Price <steven.price@xxxxxxx>
---
arch/arm64/kernel/efi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index 4a92096db34e..ae1ccc8852a4 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -34,7 +34,7 @@ static __init pteval_t create_mapping_protection(efi_memory_desc_t *md)
u32 type = md->type;
if (type == EFI_MEMORY_MAPPED_IO)
- return PROT_DEVICE_nGnRE;
+ return PROT_NS_SHARED | PROT_DEVICE_nGnRE;
if (region_is_misaligned(md)) {
static bool __initdata code_is_misaligned;
--
2.34.1
