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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm64/lib/copy_in_user.S
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/arm64/lib/copy_in_user.S')
-rw-r--r--kernel/arch/arm64/lib/copy_in_user.S70
1 files changed, 46 insertions, 24 deletions
diff --git a/kernel/arch/arm64/lib/copy_in_user.S b/kernel/arch/arm64/lib/copy_in_user.S
index 84b6c9bb9..81c8fc93c 100644
--- a/kernel/arch/arm64/lib/copy_in_user.S
+++ b/kernel/arch/arm64/lib/copy_in_user.S
@@ -17,7 +17,12 @@
*/
#include <linux/linkage.h>
+
+#include <asm/alternative.h>
#include <asm/assembler.h>
+#include <asm/cache.h>
+#include <asm/cpufeature.h>
+#include <asm/sysreg.h>
/*
* Copy from user space to user space (alignment handled by the hardware)
@@ -29,35 +34,52 @@
* Returns:
* x0 - bytes not copied
*/
+ .macro ldrb1 ptr, regB, val
+ USER(9998f, ldrb \ptr, [\regB], \val)
+ .endm
+
+ .macro strb1 ptr, regB, val
+ USER(9998f, strb \ptr, [\regB], \val)
+ .endm
+
+ .macro ldrh1 ptr, regB, val
+ USER(9998f, ldrh \ptr, [\regB], \val)
+ .endm
+
+ .macro strh1 ptr, regB, val
+ USER(9998f, strh \ptr, [\regB], \val)
+ .endm
+
+ .macro ldr1 ptr, regB, val
+ USER(9998f, ldr \ptr, [\regB], \val)
+ .endm
+
+ .macro str1 ptr, regB, val
+ USER(9998f, str \ptr, [\regB], \val)
+ .endm
+
+ .macro ldp1 ptr, regB, regC, val
+ USER(9998f, ldp \ptr, \regB, [\regC], \val)
+ .endm
+
+ .macro stp1 ptr, regB, regC, val
+ USER(9998f, stp \ptr, \regB, [\regC], \val)
+ .endm
+
+end .req x5
ENTRY(__copy_in_user)
- add x4, x0, x2 // upper user buffer boundary
- subs x2, x2, #8
- b.mi 2f
-1:
-USER(9f, ldr x3, [x1], #8 )
- subs x2, x2, #8
-USER(9f, str x3, [x0], #8 )
- b.pl 1b
-2: adds x2, x2, #4
- b.mi 3f
-USER(9f, ldr w3, [x1], #4 )
- sub x2, x2, #4
-USER(9f, str w3, [x0], #4 )
-3: adds x2, x2, #2
- b.mi 4f
-USER(9f, ldrh w3, [x1], #2 )
- sub x2, x2, #2
-USER(9f, strh w3, [x0], #2 )
-4: adds x2, x2, #1
- b.mi 5f
-USER(9f, ldrb w3, [x1] )
-USER(9f, strb w3, [x0] )
-5: mov x0, #0
+ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_HAS_PAN, \
+ CONFIG_ARM64_PAN)
+ add end, x0, x2
+#include "copy_template.S"
+ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_HAS_PAN, \
+ CONFIG_ARM64_PAN)
+ mov x0, #0
ret
ENDPROC(__copy_in_user)
.section .fixup,"ax"
.align 2
-9: sub x0, x4, x0 // bytes not copied
+9998: sub x0, end, dst // bytes not copied
ret
.previous