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efi: arm64: Map Device with Prot Shared

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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>
This commit is contained in:
Suzuki K Poulose
2024-10-17 14:14:29 +01:00
committed by Catalin Marinas
parent 3c6c706139
commit 491db21d82
1 changed files with 10 additions and 2 deletions
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arch/arm64/kernel/efi.c
+10 -2
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@@ -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;