powerpc/mm: extend _PAGE_PRIVILEGED to all CPUs
commit ac29c64089b74 ("powerpc/mm: Replace _PAGE_USER with
_PAGE_PRIVILEGED") introduced _PAGE_PRIVILEGED for BOOK3S/64
This patch generalises _PAGE_PRIVILEGED for all CPUs, allowing
to have either _PAGE_PRIVILEGED or _PAGE_USER or both.
PPC_8xx has a _PAGE_SHARED flag which is set for and only for
all non user pages. Lets rename it _PAGE_PRIVILEGED to remove
confusion as it has nothing to do with Linux shared pages.
On BookE, there's a _PAGE_BAP_SR which has to be set for kernel
pages: defining _PAGE_PRIVILEGED as _PAGE_BAP_SR will make
this generic
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/include/asm/pte-common.h b/arch/powerpc/include/asm/pte-common.h
index ce142ef..0e6595a 100644
--- a/arch/powerpc/include/asm/pte-common.h
+++ b/arch/powerpc/include/asm/pte-common.h
@@ -8,9 +8,6 @@
#ifndef _PAGE_HASHPTE
#define _PAGE_HASHPTE 0
#endif
-#ifndef _PAGE_SHARED
-#define _PAGE_SHARED 0
-#endif
#ifndef _PAGE_HWWRITE
#define _PAGE_HWWRITE 0
#endif
@@ -45,6 +42,14 @@
#ifndef _PAGE_PTE
#define _PAGE_PTE 0
#endif
+/* At least one of _PAGE_PRIVILEGED or _PAGE_USER must be defined */
+#ifndef _PAGE_PRIVILEGED
+#define _PAGE_PRIVILEGED 0
+#else
+#ifndef _PAGE_USER
+#define _PAGE_USER 0
+#endif
+#endif
#ifndef _PMD_PRESENT_MASK
#define _PMD_PRESENT_MASK _PMD_PRESENT
@@ -54,16 +59,18 @@
#define PMD_PAGE_SIZE(pmd) bad_call_to_PMD_PAGE_SIZE()
#endif
#ifndef _PAGE_KERNEL_RO
-#define _PAGE_KERNEL_RO (_PAGE_RO)
+#define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_RO)
#endif
#ifndef _PAGE_KERNEL_ROX
-#define _PAGE_KERNEL_ROX (_PAGE_EXEC | _PAGE_RO)
+#define _PAGE_KERNEL_ROX (_PAGE_PRIVILEGED | _PAGE_RO | _PAGE_EXEC)
#endif
#ifndef _PAGE_KERNEL_RW
-#define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE)
+#define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_DIRTY | _PAGE_RW | \
+ _PAGE_HWWRITE)
#endif
#ifndef _PAGE_KERNEL_RWX
-#define _PAGE_KERNEL_RWX (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE | _PAGE_EXEC)
+#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | _PAGE_RW | \
+ _PAGE_HWWRITE | _PAGE_EXEC)
#endif
#ifndef _PAGE_HPTEFLAGS
#define _PAGE_HPTEFLAGS _PAGE_HASHPTE
@@ -85,7 +92,7 @@
*/
static inline bool pte_user(pte_t pte)
{
- return (pte_val(pte) & _PAGE_USER) == _PAGE_USER;
+ return (pte_val(pte) & (_PAGE_USER | _PAGE_PRIVILEGED)) == _PAGE_USER;
}
#endif /* __ASSEMBLY__ */
@@ -116,6 +123,7 @@
#define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \
_PAGE_WRITETHRU | _PAGE_ENDIAN | _PAGE_4K_PFN | \
_PAGE_USER | _PAGE_ACCESSED | _PAGE_RO | \
+ _PAGE_PRIVILEGED | \
_PAGE_RW | _PAGE_HWWRITE | _PAGE_DIRTY | _PAGE_EXEC)
/*