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-rw-r--r--arch/arm/mm/proc-macros.S37
1 files changed, 22 insertions, 15 deletions
diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
index b795afd0a2c..e32fa499194 100644
--- a/arch/arm/mm/proc-macros.S
+++ b/arch/arm/mm/proc-macros.S
@@ -91,7 +91,7 @@
#if L_PTE_SHARED != PTE_EXT_SHARED
#error PTE shared bit mismatch
#endif
-#if (L_PTE_EXEC+L_PTE_USER+L_PTE_WRITE+L_PTE_DIRTY+L_PTE_YOUNG+\
+#if (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\
L_PTE_FILE+L_PTE_PRESENT) > L_PTE_SHARED
#error Invalid Linux PTE bit settings
#endif
@@ -109,6 +109,10 @@
* 110x 0 1 0 r/w r/o
* 11x0 0 1 0 r/w r/o
* 1111 0 1 1 r/w r/w
+ *
+ * If !CONFIG_CPU_USE_DOMAINS, the following permissions are changed:
+ * 110x 1 1 1 r/o r/o
+ * 11x0 1 1 1 r/o r/o
*/
.macro armv6_mt_table pfx
\pfx\()_mt_table:
@@ -131,7 +135,7 @@
.endm
.macro armv6_set_pte_ext pfx
- str r1, [r0], #-2048 @ linux version
+ str r1, [r0], #2048 @ linux version
bic r3, r1, #0x000003fc
bic r3, r3, #PTE_TYPE_MASK
@@ -142,17 +146,20 @@
and r2, r1, #L_PTE_MT_MASK
ldr r2, [ip, r2]
- tst r1, #L_PTE_WRITE
- tstne r1, #L_PTE_DIRTY
- orreq r3, r3, #PTE_EXT_APX
+ eor r1, r1, #L_PTE_DIRTY
+ tst r1, #L_PTE_DIRTY|L_PTE_RDONLY
+ orrne r3, r3, #PTE_EXT_APX
tst r1, #L_PTE_USER
orrne r3, r3, #PTE_EXT_AP1
+#ifdef CONFIG_CPU_USE_DOMAINS
+ @ allow kernel read/write access to read-only user pages
tstne r3, #PTE_EXT_APX
bicne r3, r3, #PTE_EXT_APX | PTE_EXT_AP0
+#endif
- tst r1, #L_PTE_EXEC
- orreq r3, r3, #PTE_EXT_XN
+ tst r1, #L_PTE_XN
+ orrne r3, r3, #PTE_EXT_XN
orr r3, r3, r2
@@ -180,9 +187,9 @@
* 1111 0xff r/w r/w
*/
.macro armv3_set_pte_ext wc_disable=1
- str r1, [r0], #-2048 @ linux version
+ str r1, [r0], #2048 @ linux version
- eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
+ eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
bic r2, r2, #PTE_TYPE_MASK
@@ -191,7 +198,7 @@
tst r3, #L_PTE_USER @ user?
orrne r2, r2, #PTE_SMALL_AP_URO_SRW
- tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty?
+ tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
orreq r2, r2, #PTE_SMALL_AP_UNO_SRW
tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
@@ -203,7 +210,7 @@
bicne r2, r2, #PTE_BUFFERABLE
#endif
.endif
- str r2, [r0] @ hardware version
+ str r2, [r0] @ hardware version
.endm
@@ -223,9 +230,9 @@
* 1111 11 r/w r/w
*/
.macro xscale_set_pte_ext_prologue
- str r1, [r0], #-2048 @ linux version
+ str r1, [r0] @ linux version
- eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
+ eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
orr r2, r2, #PTE_TYPE_EXT @ extended page
@@ -233,7 +240,7 @@
tst r3, #L_PTE_USER @ user?
orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w
- tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty?
+ tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w
@ combined with user -> user r/w
.endm
@@ -242,7 +249,7 @@
tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
movne r2, #0 @ no -> fault
- str r2, [r0] @ hardware version
+ str r2, [r0, #2048]! @ hardware version
mov ip, #0
mcr p15, 0, r0, c7, c10, 1 @ clean L1 D line
mcr p15, 0, ip, c7, c10, 4 @ data write barrier