diff mbox series

[v2,11/14] efi: arm64: Map Device with Prot Shared

Message ID 20240412084213.1733764-12-steven.price@arm.com (mailing list archive)
State New, archived
Headers show
Series arm64: Support for running as a guest in Arm CCA | expand

Commit Message

Steven Price April 12, 2024, 8:42 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 9afcc690fe73..bb8b39f16092 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -33,7 +33,7 @@  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;