diff mbox series

[v3,04/14] arm64: Mark all I/O as non-secure shared

Message ID 20240605093006.145492-5-steven.price@arm.com (mailing list archive)
State New, archived
Headers show
Series arm64: Support for running as a guest in Arm CCA | expand

Commit Message

Steven Price June 5, 2024, 9:29 a.m. UTC 
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 mbox series

Patch

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