diff options
| author | Will Deacon <will.deacon@arm.com> | 2018-01-29 12:00:00 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-16 20:06:38 +0100 |
| commit | eefd900d3450b9eb08d48519928dc7ea6d942b6a (patch) | |
| tree | bc786f778bea75443bb948f416458ab33bee6bf6 /arch/arm64/mm | |
| parent | b87b5ce113e1fe1c97b6a589ccc0f591d39287bd (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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/proc.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 598cc8c11a83..0f3c1973dc38 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -86,7 +86,7 @@ ENDPROC(cpu_do_suspend) * * x0: Address of context pointer */ - .pushsection ".idmap.text", "ax" + .pushsection ".idmap.text", "awx" ENTRY(cpu_do_resume) ldp x2, x3, [x0] ldp x4, x5, [x0, #16] @@ -152,7 +152,7 @@ ENTRY(cpu_do_switch_mm) ret ENDPROC(cpu_do_switch_mm) - .pushsection ".idmap.text", "ax" + .pushsection ".idmap.text", "awx" .macro __idmap_cpu_set_reserved_ttbr1, tmp1, tmp2 adrp \tmp1, empty_zero_page @@ -184,7 +184,7 @@ ENDPROC(idmap_cpu_replace_ttbr1) .popsection #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 - .pushsection ".idmap.text", "ax" + .pushsection ".idmap.text", "awx" .macro __idmap_kpti_get_pgtable_ent, type dc cvac, cur_\()\type\()p // Ensure any existing dirty @@ -373,7 +373,7 @@ ENDPROC(idmap_kpti_install_ng_mappings) * Initialise the processor for turning the MMU on. Return in x0 the * value of the SCTLR_EL1 register. */ - .pushsection ".idmap.text", "ax" + .pushsection ".idmap.text", "awx" ENTRY(__cpu_setup) tlbi vmalle1 // Invalidate local TLB dsb nsh |