aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mm/mmu.c
diff options
context:
space:
mode:
authorRussell King <rmk+kernel@arm.linux.org.uk>2010-11-16 00:23:31 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-12-22 11:05:35 +0000
commit9522d7e4cb5e0858122fc55d33a2c07728f0b10d (patch)
tree49438ddcd5217da82cf9ebe79dda8577bc346456 /arch/arm/mm/mmu.c
parente926f4495e202500a6265987277fab217e235f08 (diff)
ARM: pgtable: invert L_PTE_EXEC to L_PTE_XN
The hardware page tables use an XN bit 'execute never'. Historically, we've had a Linux 'execute allow' bit, in the positive sense. Get rid of this artifact as future hardware will continue to have the XN sense. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/mmu.c')
-rw-r--r--arch/arm/mm/mmu.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index bd1a11e62f4..bd5a94b2d61 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -190,7 +190,7 @@ void adjust_cr(unsigned long mask, unsigned long set)
}
#endif
-#define PROT_PTE_DEVICE L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_WRITE
+#define PROT_PTE_DEVICE L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_WRITE|L_PTE_XN
#define PROT_SECT_DEVICE PMD_TYPE_SECT|PMD_SECT_AP_WRITE
static struct mem_type mem_types[] = {
@@ -234,20 +234,19 @@ static struct mem_type mem_types[] = {
.domain = DOMAIN_KERNEL,
},
[MT_LOW_VECTORS] = {
- .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
- L_PTE_EXEC,
+ .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY,
.prot_l1 = PMD_TYPE_TABLE,
.domain = DOMAIN_USER,
},
[MT_HIGH_VECTORS] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
- L_PTE_USER | L_PTE_EXEC,
+ L_PTE_USER,
.prot_l1 = PMD_TYPE_TABLE,
.domain = DOMAIN_USER,
},
[MT_MEMORY] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
- L_PTE_WRITE | L_PTE_EXEC,
+ L_PTE_WRITE,
.prot_l1 = PMD_TYPE_TABLE,
.prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE,
.domain = DOMAIN_KERNEL,
@@ -258,21 +257,21 @@ static struct mem_type mem_types[] = {
},
[MT_MEMORY_NONCACHED] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
- L_PTE_WRITE | L_PTE_EXEC | L_PTE_MT_BUFFERABLE,
+ L_PTE_WRITE| L_PTE_MT_BUFFERABLE,
.prot_l1 = PMD_TYPE_TABLE,
.prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE,
.domain = DOMAIN_KERNEL,
},
[MT_MEMORY_DTCM] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
- L_PTE_WRITE,
+ L_PTE_WRITE | L_PTE_XN,
.prot_l1 = PMD_TYPE_TABLE,
.prot_sect = PMD_TYPE_SECT | PMD_SECT_XN,
.domain = DOMAIN_KERNEL,
},
[MT_MEMORY_ITCM] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
- L_PTE_WRITE | L_PTE_EXEC,
+ L_PTE_WRITE,
.prot_l1 = PMD_TYPE_TABLE,
.domain = DOMAIN_KERNEL,
},