From: Catalin Marinas <catalin.marinas@arm.com>
To: Will Deacon <will@kernel.org>, Reiji Watanabe <reijiw@google.com>
Cc: guanghuifeng@linux.alibaba.com,
Robin Murphy <robin.murphy@arm.com>,
Raghavendra Rao Anata <rananta@google.com>,
Evgenii Stepanov <eugenis@google.com>,
linux-arm-kernel@lists.infradead.org,
Ricardo Koller <ricarkol@google.com>,
Marc Zyngier <maz@kernel.org>, Peter Shier <pshier@google.com>,
Peter Collingbourne <pcc@google.com>,
Mark Rutland <mark.rutland@arm.com>,
Oliver Upton <oupton@google.com>,
Jing Zhang <jingzhangos@google.com>
Subject: Re: [PATCH v4 0/2] arm64: DC {ZVA, GVA, GZVA} shouldn't be used when DCZID_EL0.DZP == 1
Date: Mon, 6 Dec 2021 17:27:56 +0000 [thread overview]
Message-ID: <163881166323.164191.18202687707902578999.b4-ty@arm.com> (raw)
In-Reply-To: <20211206004736.1520989-1-reijiw@google.com>
On Sun, 5 Dec 2021 16:47:34 -0800, Reiji Watanabe wrote:
> DCZID_EL0.DZP indicates whether or not use of DC {ZVA,GVA,GZVA} is
> prohibited. However, clear_page(), mte_set_mem_tag_range(), and
> mte_zero_clear_page_tags() use those instructions without checking it.
>
> Fix those functions not to use DC {ZVA,GVA,GZVA} when DCZID_EL0.DZP == 1.
>
> v4:
> - Fix mte_zero_clear_page_tags to use stz2g instead of stzg. [Catalin]
> - Fix mte_zero_clear_page_tags to use MTE_GRANULE_SIZE instead
> of 16. [Catalin]
>
> [...]
Applied to arm64 (for-next/cache-ops-dzp), thanks!
[1/2] arm64: clear_page() shouldn't use DC ZVA when DCZID_EL0.DZP == 1
https://git.kernel.org/arm64/c/f0616abd4e67
[2/2] arm64: mte: DC {GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1
https://git.kernel.org/arm64/c/685e2564daa1
--
Catalin
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prev parent reply other threads:[~2021-12-06 17:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 0:47 [PATCH v4 0/2] arm64: DC {ZVA,GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1 Reiji Watanabe
2021-12-06 0:47 ` [PATCH v4 1/2] arm64: clear_page() shouldn't use DC ZVA " Reiji Watanabe
2021-12-06 0:47 ` [PATCH v4 2/2] arm64: mte: DC {GVA,GZVA} shouldn't be used " Reiji Watanabe
2021-12-06 17:27 ` Catalin Marinas [this message]
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