AuxXxilium/linux_dsm_epyc7002
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3dbcea54b3
linux_dsm_epyc7002/arch/arm64
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Mark Rutland 3dbcea54b3 arm64: apply workaround on A64FX v1r0 
Fujitsu erratum 010001 applies to A64FX v0r0 and v1r0, and we try to
handle either by masking MIDR with MIDR_FUJITSU_ERRATUM_010001_MASK
before comparing it to MIDR_FUJITSU_ERRATUM_010001.

Unfortunately, MIDR_FUJITSU_ERRATUM_010001 is constructed incorrectly
using MIDR_VARIANT(), which is intended to extract the variant field
from MIDR_EL1, rather than generate the field in-place. This results in
MIDR_FUJITSU_ERRATUM_010001 being all-ones, and we only match A64FX
v0r0.

This patch uses MIDR_CPU_VAR_REV() to generate an in-place mask for the
variant field, ensuring the we match both v0r0 and v1r0.

Fixes: 3e32131abc ("arm64: Add workaround for Fujitsu A64FX erratum 010001")
Reported-by: "Okamoto, Takayuki" <tokamoto@jp.fujitsu.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
[catalin.marinas@arm.com: fixed the patch author]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-03-19 14:54:24 +00:00
..
boot This is the bulk of pin control changes for the v5.1 kernel cycle. 2019-03-11 11:12:50 -07:00
configs Allwinner arm64 defconfig changes for 5.1 2019-02-15 16:51:26 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-03-05 09:09:55 -08:00
include arm64: apply workaround on A64FX v1r0 2019-03-19 14:54:24 +00:00
kernel arm64: kprobes: Use arch_populate_kprobe_blacklist() 2019-03-19 12:47:44 +00:00
kvm ARM: some cleanups, direct physical timer assignment, cache sanitization 2019-03-15 15:00:28 -07:00
lib arm64: string: use asm EXPORT_SYMBOL() 2018-12-10 11:50:12 +00:00
mm treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
net arm64: bpf: implement jitting of JMP32 2019-01-26 13:33:02 -08:00
xen arm64: mm: Add additional parameter to uaccess_ttbr0_disable 2018-01-17 13:57:49 +01:00
Kconfig DMA mapping updates for 5.1 2019-03-10 11:54:48 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Kconfig.platforms arm64 updates for 5.1: 2019-03-10 10:17:23 -07:00
Makefile kasan, arm64: adjust shadow size for tag-based mode 2018-12-28 12:11:43 -08:00