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Message-Id: <20240701095505.165383-12-steven.price@arm.com>
Date: Mon, 1 Jul 2024 10:55:01 +0100
From: Steven Price <steven.price@....com>
To: kvm@...r.kernel.org,
kvmarm@...ts.linux.dev
Cc: Suzuki K Poulose <suzuki.poulose@....com>,
Catalin Marinas <catalin.marinas@....com>,
Marc Zyngier <maz@...nel.org>,
Will Deacon <will@...nel.org>,
James Morse <james.morse@....com>,
Oliver Upton <oliver.upton@...ux.dev>,
Zenghui Yu <yuzenghui@...wei.com>,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
Joey Gouly <joey.gouly@....com>,
Alexandru Elisei <alexandru.elisei@....com>,
Christoffer Dall <christoffer.dall@....com>,
Fuad Tabba <tabba@...gle.com>,
linux-coco@...ts.linux.dev,
Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
Steven Price <steven.price@....com>
Subject: [PATCH v4 11/15] efi: arm64: Map Device with Prot Shared
From: Suzuki K Poulose <suzuki.poulose@....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@....com>
Signed-off-by: Steven Price <steven.price@....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 4a92096db34e..ae1ccc8852a4 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -34,7 +34,7 @@ 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
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