TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc/64s: Use generic permission masks

Browse Source 
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>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/d37a418de52e2c950cad6797e81663b56991366f.1695659959.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2023-09-25 20:31:41 +02:00
committed by Michael Ellerman
parent f9f09b93e8
commit 58f534623c
1 changed files with 5 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/powerpc/include/asm/book3s/64/pgtable.h
+5 -15
View File
@@ -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)