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| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2024-10-17 14:14:29 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2024-10-23 10:19:32 +0100 |
| commit | 491db21d8256992ab9fe11c42744eb3044315d14 (patch) | |
| tree | 4634e5815f2c7eee904c73cbf7230f864ea9a10a | |
| parent | arm64: rsi: Map unprotected MMIO as decrypted (diff) | |
| download | wireguard-linux-491db21d8256992ab9fe11c42744eb3044315d14.tar.xz wireguard-linux-491db21d8256992ab9fe11c42744eb3044315d14.zip | |
efi: arm64: Map Device with Prot Shared
Device mappings need to be emulated by the VMM so must be mapped shared
with the host.
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20241017131434.40935-7-steven.price@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/kernel/efi.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index 712718aed5dd..1d25d8899dbf 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -34,8 +34,16 @@ static __init pteval_t create_mapping_protection(efi_memory_desc_t *md) u64 attr = md->attribute; u32 type = md->type; - if (type == EFI_MEMORY_MAPPED_IO) - return PROT_DEVICE_nGnRE; + if (type == EFI_MEMORY_MAPPED_IO) { + pgprot_t prot = __pgprot(PROT_DEVICE_nGnRE); + + if (arm64_is_protected_mmio(md->phys_addr, + md->num_pages << EFI_PAGE_SHIFT)) + prot = pgprot_encrypted(prot); + else + prot = pgprot_decrypted(prot); + return pgprot_val(prot); + } if (region_is_misaligned(md)) { static bool __initdata code_is_misaligned; |