This is a note to let you know that I've just added the patch titled arm64: fix midr range for Cortex-A57 erratum 832075 to the 4.0-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arm64-fix-midr-range-for-cortex-a57-erratum-832075.patch and it can be found in the queue-4.0 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 6d1966dfd6e0ad2f8aa4b664ae1a62e33abe1998 Mon Sep 17 00:00:00 2001 From: Bo Yan <byan@xxxxxxxxxx> Date: Tue, 31 Mar 2015 21:30:48 +0100 Subject: arm64: fix midr range for Cortex-A57 erratum 832075 From: Bo Yan <byan@xxxxxxxxxx> commit 6d1966dfd6e0ad2f8aa4b664ae1a62e33abe1998 upstream. Register MIDR_EL1 is masked to get variant and revision fields, then compared against midr_range_min and midr_range_max when checking whether CPU is affected by any particular erratum. However, variant and revision fields in MIDR_EL1 are separated by 16 bits, so the min and max of midr range should be constructed accordingly, otherwise the patch will not be applied when variant field is non-0. Acked-by: Andre Przywara <andre.przywara@xxxxxxx> Reviewed-by: Paul Walmsley <paul@xxxxxxxxx> Signed-off-by: Bo Yan <byan@xxxxxxxxxx> [will: use MIDR_VARIANT_SHIFT to construct upper bound] Signed-off-by: Will Deacon <will.deacon@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm64/kernel/cpu_errata.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -88,7 +88,8 @@ struct arm64_cpu_capabilities arm64_erra /* Cortex-A57 r0p0 - r1p2 */ .desc = "ARM erratum 832075", .capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE, - MIDR_RANGE(MIDR_CORTEX_A57, 0x00, 0x12), + MIDR_RANGE(MIDR_CORTEX_A57, 0x00, + (1 << MIDR_VARIANT_SHIFT) | 2), }, #endif { Patches currently in stable-queue which might be from byan@xxxxxxxxxx are queue-4.0/arm64-fix-midr-range-for-cortex-a57-erratum-832075.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html