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@xxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Signed-off-by: Steven Price <steven.price@xxxxxxx>
---
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 4ff0ae3f6d66..0a219c03750b 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -277,12 +277,12 @@ static inline void __const_iowrite64_copy(void __iomem *to, const void *from,
#define ioremap_prot ioremap_prot
-#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
