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| author | Will Deacon <will.deacon@arm.com> | 2018-01-29 13:00:00 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-02-06 23:53:27 +0100 |
| commit | 439e70e27a51fe374806f460848066b237b0c10b (patch) | |
| tree | 6ee39e0a49a2f6de0878fe09b291cf53fa9bd941 /arch/arm64/mm | |
| parent | arm64: assembler: Align phys_to_pte with pte_to_phys (diff) | |
| download | linux-439e70e27a51fe374806f460848066b237b0c10b.tar.xz linux-439e70e27a51fe374806f460848066b237b0c10b.zip | |
arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives
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>
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 cfd22ba9b510..71baed7e592a 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -90,7 +90,7 @@ 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] @@ -165,7 +165,7 @@ ENTRY(cpu_do_switch_mm) b post_ttbr_update_workaround // Back to C code... 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 @@ -199,7 +199,7 @@ 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 @@ -388,7 +388,7 @@ 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 |