diff mbox series

[v2,27/37] powerpc/64s: Use generic permission masks

Message ID d37a418de52e2c950cad6797e81663b56991366f.1695659959.git.christophe.leroy@csgroup.eu (mailing list archive)
State Accepted
Commit 58f534623c4d8800c2e5d63da9783530848e570c
Headers show
Series Implement execute-only protection on powerpc | expand

Commit Message

Christophe Leroy Sept. 25, 2023, 6:31 p.m. UTC 
book3s64 need specific masks because it needs _PAGE_PRIVILEGED
for PAGE_NONE.

book3s64 already has _PAGE_RW and _PAGE_RWX.
So add _PAGE_NA, _PAGE_RO and _PAGE_ROX and remove specific
permission masks.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
Not sure why it needs _PAGE_PRIVILEGED as it also have _PAGE_READ
and _PAGE_READ is not set on PAGE_NONE.
---
 arch/powerpc/include/asm/book3s/64/pgtable.h | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index c3b921769ece..0fd12bdc7b5e 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -17,6 +17,9 @@ 
 #define _PAGE_EXEC		0x00001 /* execute permission */
 #define _PAGE_WRITE		0x00002 /* write access allowed */
 #define _PAGE_READ		0x00004	/* read access allowed */
+#define _PAGE_NA		_PAGE_PRIVILEGED
+#define _PAGE_RO		_PAGE_READ
+#define _PAGE_ROX		(_PAGE_READ | _PAGE_EXEC)
 #define _PAGE_RW		(_PAGE_READ | _PAGE_WRITE)
 #define _PAGE_RWX		(_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
 #define _PAGE_PRIVILEGED	0x00008 /* kernel access only */
@@ -136,21 +139,8 @@ 
 #define _PAGE_BASE_NC	(_PAGE_PRESENT | _PAGE_ACCESSED)
 #define _PAGE_BASE	(_PAGE_BASE_NC)
 
-/* Permission masks used to generate the __P and __S table,
- *
- * Note:__pgprot is defined in arch/powerpc/include/asm/page.h
- *
- * Write permissions imply read permissions for now (we could make write-only
- * pages on BookE but we don't bother for now). Execute permission control is
- * possible on platforms that define _PAGE_EXEC
- */
-#define PAGE_NONE	__pgprot(_PAGE_BASE | _PAGE_PRIVILEGED)
-#define PAGE_SHARED	__pgprot(_PAGE_BASE | _PAGE_RW)
-#define PAGE_SHARED_X	__pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_EXEC)
-#define PAGE_COPY	__pgprot(_PAGE_BASE | _PAGE_READ)
-#define PAGE_COPY_X	__pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
-#define PAGE_READONLY	__pgprot(_PAGE_BASE | _PAGE_READ)
-#define PAGE_READONLY_X	__pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
+#include <asm/pgtable-masks.h>
+
 /* Radix only, Hash uses PAGE_READONLY_X + execute-only pkey instead */
 #define PAGE_EXECONLY	__pgprot(_PAGE_BASE | _PAGE_EXEC)