Add an extra temporary register parameter to uaccess_ttbr0_disable which
is about to be required for arm64 PAN support.
This patch doesn't introduce any functional change but ensures that the
kernel compiles once the KVM/ARM tree is merged with the arm64 tree by
ensuring a trivially mergable conflict with commit
6b88a32c7af68895134872cdec3b6bfdb532d94e
("arm64: kpti: Fix the interaction between ASID switching and software PAN").
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Signed-off-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
---
arch/arm64/include/asm/asm-uaccess.h | 8 ++++----
arch/arm64/lib/clear_user.S | 2 +-
arch/arm64/lib/copy_from_user.S | 2 +-
arch/arm64/lib/copy_in_user.S | 2 +-
arch/arm64/lib/copy_to_user.S | 2 +-
arch/arm64/mm/cache.S | 4 ++--
arch/arm64/xen/hypercall.S | 2 +-
7 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/arch/arm64/include/asm/asm-uaccess.h b/arch/arm64/include/asm/asm-uaccess.h
index b67563d2024c..03064261ee0b 100644
--- a/arch/arm64/include/asm/asm-uaccess.h
+++ b/arch/arm64/include/asm/asm-uaccess.h
@@ -25,7 +25,7 @@
isb
.endm
- .macro uaccess_ttbr0_disable, tmp1
+ .macro uaccess_ttbr0_disable, tmp1, tmp2
alternative_if_not ARM64_HAS_PAN
__uaccess_ttbr0_disable \tmp1
alternative_else_nop_endif
@@ -39,7 +39,7 @@ alternative_if_not ARM64_HAS_PAN
alternative_else_nop_endif
.endm
#else
- .macro uaccess_ttbr0_disable, tmp1
+ .macro uaccess_ttbr0_disable, tmp1, tmp2
.endm
.macro uaccess_ttbr0_enable, tmp1, tmp2, tmp3
@@ -49,8 +49,8 @@ alternative_else_nop_endif
/*
* These macros are no-ops when UAO is present.
*/
- .macro uaccess_disable_not_uao, tmp1
- uaccess_ttbr0_disable \tmp1
+ .macro uaccess_disable_not_uao, tmp1, tmp2
+ uaccess_ttbr0_disable \tmp1, \tmp2
alternative_if ARM64_ALT_PAN_NOT_UAO
SET_PSTATE_PAN(1)
alternative_else_nop_endif
diff --git a/arch/arm64/lib/clear_user.S b/arch/arm64/lib/clear_user.S
index e88fb99c1561..8932e5f7a6f3 100644
--- a/arch/arm64/lib/clear_user.S
+++ b/arch/arm64/lib/clear_user.S
@@ -50,7 +50,7 @@ uao_user_alternative 9f, strh, sttrh, wzr, x0, 2
b.mi 5f
uao_user_alternative 9f, strb, sttrb, wzr, x0, 0
5: mov x0, #0
- uaccess_disable_not_uao x2
+ uaccess_disable_not_uao x2, x3
ret
ENDPROC(__clear_user)
diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S
index 4b5d826895ff..bc108634992c 100644
--- a/arch/arm64/lib/copy_from_user.S
+++ b/arch/arm64/lib/copy_from_user.S
@@ -67,7 +67,7 @@ ENTRY(__arch_copy_from_user)
uaccess_enable_not_uao x3, x4
add end, x0, x2
#include "copy_template.S"
- uaccess_disable_not_uao x3
+ uaccess_disable_not_uao x3, x4
mov x0, #0 // Nothing to copy
ret
ENDPROC(__arch_copy_from_user)
diff --git a/arch/arm64/lib/copy_in_user.S b/arch/arm64/lib/copy_in_user.S
index b24a830419ad..e6dd59dd4053 100644
--- a/arch/arm64/lib/copy_in_user.S
+++ b/arch/arm64/lib/copy_in_user.S
@@ -68,7 +68,7 @@ ENTRY(raw_copy_in_user)
uaccess_enable_not_uao x3, x4
add end, x0, x2
#include "copy_template.S"
- uaccess_disable_not_uao x3
+ uaccess_disable_not_uao x3, x4
mov x0, #0
ret
ENDPROC(raw_copy_in_user)
diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S
index 351f0766f7a6..bd20f9f7dd84 100644
--- a/arch/arm64/lib/copy_to_user.S
+++ b/arch/arm64/lib/copy_to_user.S
@@ -66,7 +66,7 @@ ENTRY(__arch_copy_to_user)
uaccess_enable_not_uao x3, x4
add end, x0, x2
#include "copy_template.S"
- uaccess_disable_not_uao x3
+ uaccess_disable_not_uao x3, x4
mov x0, #0
ret
ENDPROC(__arch_copy_to_user)
diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S
index 5a52811f47e9..758bde7e2fa6 100644
--- a/arch/arm64/mm/cache.S
+++ b/arch/arm64/mm/cache.S
@@ -63,7 +63,7 @@ user_alt 9f, "dc cvau, x4", "dc civac, x4", ARM64_WORKAROUND_CLEAN_CACHE
invalidate_icache_by_line x0, x1, x2, x3, 9f
mov x0, #0
1:
- uaccess_ttbr0_disable x1
+ uaccess_ttbr0_disable x1, x2
ret
9:
mov x0, #-EFAULT
@@ -85,7 +85,7 @@ ENTRY(invalidate_icache_range)
invalidate_icache_by_line x0, x1, x2, x3, 2f
mov x0, xzr
1:
- uaccess_ttbr0_disable x1
+ uaccess_ttbr0_disable x1, x2
ret
2:
mov x0, #-EFAULT
diff --git a/arch/arm64/xen/hypercall.S b/arch/arm64/xen/hypercall.S
index acdbd2c9e899..c5f05c4a4d00 100644
--- a/arch/arm64/xen/hypercall.S
+++ b/arch/arm64/xen/hypercall.S
@@ -107,6 +107,6 @@ ENTRY(privcmd_call)
/*
* Disable userspace access from kernel once the hyp call completed.
*/
- uaccess_ttbr0_disable x6
+ uaccess_ttbr0_disable x6, x7
ret
ENDPROC(privcmd_call);
--
2.14.2
