linux/arch/arm64
Yee Lee 7a062ce318 arm64/cpufeature: Optionally disable MTE via command-line
MTE support needs to be optionally disabled in runtime
for HW issue workaround, FW development and some
evaluation works on system resource and performance.

This patch makes two changes:
(1) moves init of tag-allocation bits(ATA/ATA0) to
cpu_enable_mte() as not cached in TLB.

(2) allows ID_AA64PFR1_EL1.MTE to be overridden on
its shadow value by giving "arm64.nomte" on cmdline.

When the feature value is off, ATA and TCF will not set
and the related functionalities are accordingly suppressed.

Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Suggested-by: Marc Zyngier <maz@kernel.org>
Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Yee Lee <yee.lee@mediatek.com>
Link: https://lore.kernel.org/r/20210803070824.7586-2-yee.lee@mediatek.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-08-03 15:48:01 +01:00
..
boot USB fixes for 5.14-rc3 2021-07-23 10:09:27 -07:00
configs Additional Qualcomm ARM64 defconfig udpate for v5.14 2021-06-23 19:01:58 -07:00
crypto crypto: arm64 - use a pattern rule for generating *.S files 2021-05-14 19:07:54 +08:00
include arm64/cpufeature: Optionally disable MTE via command-line 2021-08-03 15:48:01 +01:00
kernel arm64/cpufeature: Optionally disable MTE via command-line 2021-08-03 15:48:01 +01:00
kvm Merge branch 'akpm' (patches from Andrew) 2021-07-02 12:08:10 -07:00
lib arm64: Avoid premature usercopy failure 2021-07-15 17:29:14 +01:00
mm arm64: kasan: mte: remove redundant mte_report_once logic 2021-08-02 18:15:28 +01:00
net Networking changes for 5.14. 2021-06-30 15:51:09 -07:00
tools arm64: Allow mismatched 32-bit EL0 support 2021-06-11 13:25:40 +01:00
xen
Kbuild bpf: Fix BPF_JIT kconfig symbol dependency 2021-05-20 23:48:37 +02:00
Kconfig arm64: Restrict ARM64_BTI_KERNEL to clang 12.0.0 and newer 2021-07-13 16:31:31 +01:00
Kconfig.debug
Kconfig.platforms Merge branch 'arm/fixes' into arm/soc 2021-07-09 10:46:02 -07:00
Makefile Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00