[RFC PATCH 05/14] arm64: Mark all I/O as non-secure shared
From: Steven Price <steven.price@arm.com>
Date: 2023-01-27 11:30:23
Also in:
kvmarm, linux-coco, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
All I/O is by default considered non-secure for realms. As such mark them as shared with the host. Co-developed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arm64/include/asm/io.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 877495a0fd0c..b1a9c22aed72 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h@@ -142,12 +142,12 @@ extern void __memset_io(volatile void __iomem *, int, size_t); bool ioremap_allowed(phys_addr_t phys_addr, size_t size, unsigned long prot); #define ioremap_allowed ioremap_allowed -#define _PAGE_IOREMAP PROT_DEVICE_nGnRE +#define _PAGE_IOREMAP (PROT_DEVICE_nGnRE | PROT_NS_SHARED) #define ioremap_wc(addr, size) \ - ioremap_prot((addr), (size), PROT_NORMAL_NC) + ioremap_prot((addr), (size), (PROT_NORMAL_NC | PROT_NS_SHARED)) #define ioremap_np(addr, size) \ - ioremap_prot((addr), (size), PROT_DEVICE_nGnRnE) + ioremap_prot((addr), (size), (PROT_DEVICE_nGnRnE | PROT_NS_SHARED)) /* * io{read,write}{16,32,64}be() macros
--
2.34.1
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