diff mbox series

[RFC,12/14] efi: arm64: Map Device with Prot Shared

Message ID 20230127112758.37891-13-steven.price@arm.com
State New
Headers
Series arm64: Support for running as a guest in Arm CCA |

Commit Message

Steven Price Jan. 27, 2023, 11:27 a.m. UTC 
  From: Suzuki K Poulose <suzuki.poulose@arm.com>

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@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
---
 arch/arm64/kernel/efi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index fab05de2e12d..03a876707fc5 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -31,7 +31,7 @@  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;