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From: Steven Price <steven.price@arm.com>
To: kvm@vger.kernel.org,
	kvmarm@lists.linux.dev
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
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	Zenghui Yu <yuzenghui@huawei.com>,
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	Joey Gouly <joey.gouly@arm.com>,
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	Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>,
	Steven Price <steven.price@arm.com>
Subject: [PATCH v2 11/14] efi: arm64: Map Device with Prot Shared
Date: Fri, 12 Apr 2024 09:42:10 +0100
Message-Id: <20240412084213.1733764-12-steven.price@arm.com>
In-Reply-To: <20240412084213.1733764-1-steven.price@arm.com>
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 <20240412084213.1733764-1-steven.price@arm.com>
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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 --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;
-- 
2.34.1