diff options
| author | Sami Tolvanen <samitolvanen@google.com> | 2016-12-14 12:32:56 -0800 |
|---|---|---|
| committer | Sami Tolvanen <samitolvanen@google.com> | 2017-01-04 09:02:08 -0800 |
| commit | c86266edfaa4e39a5f784e1c9ee8ec6ba2803cc1 (patch) | |
| tree | f50f79a6616e1929f46cdc83c346744e1ac45add /arch/arm64/lib | |
| parent | 81688dbb3294585e137270f84275e6e94cbc9d7e (diff) | |
Revert "FROMLIST: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros"
This reverts commit 23368b642deb01ac6ce668ec1dedfcc0cab25c71.
Bug: 31432001
Change-Id: Ia59e5fc75ef905b89d5f9194f1e762c1e5eff5bf
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Diffstat (limited to 'arch/arm64/lib')
| -rw-r--r-- | arch/arm64/lib/clear_user.S | 8 | ||||
| -rw-r--r-- | arch/arm64/lib/copy_from_user.S | 8 | ||||
| -rw-r--r-- | arch/arm64/lib/copy_in_user.S | 8 | ||||
| -rw-r--r-- | arch/arm64/lib/copy_to_user.S | 8 |
4 files changed, 20 insertions, 12 deletions
diff --git a/arch/arm64/lib/clear_user.S b/arch/arm64/lib/clear_user.S index 08b5f18ba604..5d1cad3ce6d6 100644 --- a/arch/arm64/lib/clear_user.S +++ b/arch/arm64/lib/clear_user.S @@ -17,10 +17,10 @@ */ #include <linux/linkage.h> +#include <asm/alternative.h> #include <asm/assembler.h> #include <asm/cpufeature.h> #include <asm/sysreg.h> -#include <asm/uaccess.h> .text @@ -33,7 +33,8 @@ * Alignment fixed up by hardware. */ ENTRY(__clear_user) - uaccess_enable_not_uao x2, x3 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) mov x2, x1 // save the size for fixup return subs x1, x1, #8 b.mi 2f @@ -53,7 +54,8 @@ 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 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) ret ENDPROC(__clear_user) diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S index 6505ec81f1da..0b90497d4424 100644 --- a/arch/arm64/lib/copy_from_user.S +++ b/arch/arm64/lib/copy_from_user.S @@ -16,11 +16,11 @@ #include <linux/linkage.h> +#include <asm/alternative.h> #include <asm/assembler.h> #include <asm/cache.h> #include <asm/cpufeature.h> #include <asm/sysreg.h> -#include <asm/uaccess.h> /* * Copy from user space to a kernel buffer (alignment handled by the hardware) @@ -67,10 +67,12 @@ end .req x5 ENTRY(__arch_copy_from_user) - uaccess_enable_not_uao x3, x4 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) add end, x0, x2 #include "copy_template.S" - uaccess_disable_not_uao x3 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) 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 9b04ff3ab610..f7292dd08c84 100644 --- a/arch/arm64/lib/copy_in_user.S +++ b/arch/arm64/lib/copy_in_user.S @@ -18,11 +18,11 @@ #include <linux/linkage.h> +#include <asm/alternative.h> #include <asm/assembler.h> #include <asm/cache.h> #include <asm/cpufeature.h> #include <asm/sysreg.h> -#include <asm/uaccess.h> /* * Copy from user space to user space (alignment handled by the hardware) @@ -68,10 +68,12 @@ end .req x5 ENTRY(__copy_in_user) - uaccess_enable_not_uao x3, x4 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) add end, x0, x2 #include "copy_template.S" - uaccess_disable_not_uao x3 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) mov x0, #0 ret ENDPROC(__copy_in_user) diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S index 8077e4f34d56..7a7efe255034 100644 --- a/arch/arm64/lib/copy_to_user.S +++ b/arch/arm64/lib/copy_to_user.S @@ -16,11 +16,11 @@ #include <linux/linkage.h> +#include <asm/alternative.h> #include <asm/assembler.h> #include <asm/cache.h> #include <asm/cpufeature.h> #include <asm/sysreg.h> -#include <asm/uaccess.h> /* * Copy to user space from a kernel buffer (alignment handled by the hardware) @@ -66,10 +66,12 @@ end .req x5 ENTRY(__arch_copy_to_user) - uaccess_enable_not_uao x3, x4 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) add end, x0, x2 #include "copy_template.S" - uaccess_disable_not_uao x3 +ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(1)), ARM64_ALT_PAN_NOT_UAO, \ + CONFIG_ARM64_PAN) mov x0, #0 ret ENDPROC(__arch_copy_to_user) |