linux-kernel - Re: [PATCH v7 0/8] support FEAT_MTE_STORE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <175148125054.2930777.8008346134199454923.b4-ty@arm.com>
Date: Wed,  2 Jul 2025 19:34:23 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: pcc@...gle.com,
	will@...nel.org,
	broonie@...nel.org,
	anshuman.khandual@....com,
	joey.gouly@....com,
	maz@...nel.org,
	oliver.upton@...ux.dev,
	frederic@...nel.org,
	hardevsinh.palaniya@...iconsignals.io,
	samuel.holland@...ive.com,
	palmer@...osinc.com,
	charlie@...osinc.com,
	thiago.bauermann@...aro.org,
	bgray@...ux.ibm.com,
	tglx@...utronix.de,
	puranjay@...nel.org,
	david@...hat.com,
	yang@...amperecomputing.com,
	mbenes@...e.cz,
	joel.granados@...nel.org,
	Yeoreum Yun <yeoreum.yun@....com>
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 0/8] support FEAT_MTE_STORE_ONLY feature

On Wed, 18 Jun 2025 10:29:49 +0100, Yeoreum Yun wrote:
> ARMv8.5 based processors introduce the Memory Tagging Extension (MTE) feature.
> MTE is built on top of the ARMv8.0 virtual address tagging TBI
> (Top Byte Ignore) feature and allows software to access a 4-bit
> allocation tag for each 16-byte granule in the physical address space.
> A logical tag is derived from bits 59-56 of the virtual
> address used for the memory access. A CPU with MTE enabled will compare
> the logical tag against the allocation tag and potentially raise an
> tag check fault on mismatch, subject to system registers configuration.
> 
> [...]

Applied to arm64 (for-next/feat_mte_store_only), thanks!

[1/8] arm64/cpufeature: add MTE_STORE_ONLY feature
      https://git.kernel.org/arm64/c/33e943a22853
[2/8] prctl: introduce PR_MTE_STORE_ONLY
      https://git.kernel.org/arm64/c/b1fabef37bd5
[3/8] arm64/kernel: support store-only mte tag check
      https://git.kernel.org/arm64/c/4d51ff5bba00
[4/8] arm64/hwcaps: add MTE_STORE_ONLY hwcaps
      https://git.kernel.org/arm64/c/f620372209bf
[5/8] arm64/kvm: expose MTE_STORE_ONLY feature to guest
      https://git.kernel.org/arm64/c/7502bdb43aa2
[6/8] kselftest/arm64/abi: add MTE_STORE_ONLY feature hwcap test
      https://git.kernel.org/arm64/c/964a07426eb8
[7/8] kselftest/arm64/mte: preparation for mte store only test
      https://git.kernel.org/arm64/c/391ca7c81b85
[8/8] kselftest/arm64/mte: add MTE_STORE_ONLY testcases
      https://git.kernel.org/arm64/c/1f488fb91378

-- 
Catalin