diff options
| author | Will Deacon <will.deacon@arm.com> | 2018-04-03 12:09:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-08 12:12:56 +0200 |
| commit | 574e44dc36676a13af084a9d5f42cc71a59b8066 (patch) | |
| tree | 44befdc9936e68b39de31d121b9d0c2e61a4daf2 /arch/arm64/kernel | |
| parent | a80d8e2979f32113df09b844d5e12e771162db40 (diff) | |
arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives
commit 439e70e27a51 upstream.
The identity map is mapped as both writeable and executable by the
SWAPPER_MM_MMUFLAGS and this is relied upon by the kpti code to manage
a synchronisation flag. Update the .pushsection flags to reflect the
actual mapping attributes.
Reported-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Alex Shi <alex.shi@linaro.org> [v4.9 backport]
Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport]
Tested-by: Will Deacon <will.deacon@arm.com>
Tested-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/cpu-reset.S | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/head.S | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/sleep.S | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm64/kernel/cpu-reset.S b/arch/arm64/kernel/cpu-reset.S index 65f42d257414..f736a6f81ecd 100644 --- a/arch/arm64/kernel/cpu-reset.S +++ b/arch/arm64/kernel/cpu-reset.S @@ -16,7 +16,7 @@ #include <asm/virt.h> .text -.pushsection .idmap.text, "ax" +.pushsection .idmap.text, "awx" /* * __cpu_soft_restart(el2_switch, entry, arg0, arg1, arg2) - Helper for diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 539bebc1222f..fa52817d84c5 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -473,7 +473,7 @@ ENDPROC(__primary_switched) * end early head section, begin head code that is also used for * hotplug and needs to have the same protections as the text region */ - .section ".idmap.text","ax" + .section ".idmap.text","awx" ENTRY(kimage_vaddr) .quad _text - TEXT_OFFSET diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S index 1bec41b5fda3..0030d6964e65 100644 --- a/arch/arm64/kernel/sleep.S +++ b/arch/arm64/kernel/sleep.S @@ -95,7 +95,7 @@ ENTRY(__cpu_suspend_enter) ret ENDPROC(__cpu_suspend_enter) - .pushsection ".idmap.text", "ax" + .pushsection ".idmap.text", "awx" ENTRY(cpu_resume) bl el2_setup // if in EL2 drop to EL1 cleanly bl __cpu_setup |