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
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asm	arm64/cpufeature: Optionally disable MTE via command-line	2021-08-03 15:48:01 +01:00
uapi/asm	arch, mm: wire up memfd_secret system call where relevant	2021-07-08 11:48:21 -07:00