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| author | Will Deacon <will.deacon@arm.com> | 2012-07-20 18:24:55 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-15 12:04:10 -0700 |
| commit | 0b41a531bee76feefaa22878b035d8c71edcb87e (patch) | |
| tree | 853fc9134e5c3d3170386744f5d5b8f7d8c8e878 /arch | |
| parent | cad33da5ceedac56481dd3168e42580e9bec6343 (diff) | |
| download | kernel_samsung_crespo-0b41a531bee76feefaa22878b035d8c71edcb87e.zip kernel_samsung_crespo-0b41a531bee76feefaa22878b035d8c71edcb87e.tar.gz kernel_samsung_crespo-0b41a531bee76feefaa22878b035d8c71edcb87e.tar.bz2 | |
ARM: 7478/1: errata: extend workaround for erratum #720789
commit 5a783cbc48367cfc7b65afc75430953dfe60098f upstream.
Commit cdf357f1 ("ARM: 6299/1: errata: TLBIASIDIS and TLBIMVAIS
operations can broadcast a faulty ASID") replaced by-ASID TLB flushing
operations with all-ASID variants to workaround A9 erratum #720789.
This patch extends the workaround to include the tlb_range operations,
which were overlooked by the original patch.
Tested-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mm/tlb-v7.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mm/tlb-v7.S b/arch/arm/mm/tlb-v7.S index 53cd5b4..875634a 100644 --- a/arch/arm/mm/tlb-v7.S +++ b/arch/arm/mm/tlb-v7.S @@ -38,11 +38,19 @@ ENTRY(v7wbi_flush_user_tlb_range) dsb mov r0, r0, lsr #PAGE_SHIFT @ align address mov r1, r1, lsr #PAGE_SHIFT +#ifdef CONFIG_ARM_ERRATA_720789 + mov r3, #0 +#else asid r3, r3 @ mask ASID +#endif orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA mov r1, r1, lsl #PAGE_SHIFT 1: +#ifdef CONFIG_ARM_ERRATA_720789 + ALT_SMP(mcr p15, 0, r0, c8, c3, 3) @ TLB invalidate U MVA all ASID (shareable) +#else ALT_SMP(mcr p15, 0, r0, c8, c3, 1) @ TLB invalidate U MVA (shareable) +#endif ALT_UP(mcr p15, 0, r0, c8, c7, 1) @ TLB invalidate U MVA add r0, r0, #PAGE_SZ @@ -70,7 +78,11 @@ ENTRY(v7wbi_flush_kern_tlb_range) mov r0, r0, lsl #PAGE_SHIFT mov r1, r1, lsl #PAGE_SHIFT 1: +#ifdef CONFIG_ARM_ERRATA_720789 + ALT_SMP(mcr p15, 0, r0, c8, c3, 3) @ TLB invalidate U MVA all ASID (shareable) +#else ALT_SMP(mcr p15, 0, r0, c8, c3, 1) @ TLB invalidate U MVA (shareable) +#endif ALT_UP(mcr p15, 0, r0, c8, c7, 1) @ TLB invalidate U MVA add r0, r0, #PAGE_SZ cmp r0, r1 |