Commit 491db21d authored Oct 17, 2024 by Suzuki K Poulose Committed by Catalin Marinas Oct 23, 2024

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>

parent 3c6c7061

arch/arm64/kernel/efi.c

+10 −2

Original line number	Diff line number	Diff line
		@@ -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;