From: Will Deacon <will@kernel.org>
To: Steven Price <steven.price@arm.com>, maz@kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH v5 0/3] arm64: Workaround for Cortex-A55 erratum 1530923
Date: Tue, 14 Jan 2020 16:45:44 +0000 [thread overview]
Message-ID: <20200114164543.GD2579@willie-the-truck> (raw)
In-Reply-To: <20191216115631.17804-1-steven.price@arm.com>
On Mon, Dec 16, 2019 at 11:56:28AM +0000, Steven Price wrote:
> Version 5 is a rebasing of version 4 (no changes).
>
> This series enables a workaround for Cortex-A55 erratum 1530923. The
> erratum potentially allows TLB entries to be allocated as a result of a
> speculative AT instruction. This may happen in the middle of a guest
> world switch while the relevant VMSA configuration is in an inconsistent
> state, leading to erroneous content being allocated into TLBs.
>
> There are existing workarounds for similar issues, 1165522 is
> effectively the same, and 1319367/1319537 is similar but without VHE
> support. Rather than add to the selection of errata, the first patch
> renames 1165522 to WORKAROUND_SPECULATIVE_AT which can be reused (in the
> final patch) for 1530923.
>
> The workaround for errata 1319367 and 1319537 although similar cannot
> use VHE (not available on those CPUs) so cannot share the workaround.
> However, to keep some sense of symmetry the workaround is renamed to
> SPECULATIVE_AT_NVHE.
>
> Changes since v4:
> * Rebased to v5.5-rc1
Looks fine to me. Marc, are you ok with me queueing this via arm64 (that's
where the existing workarounds came from), or would you prefer to take them
via kvm-arm?
Will
next prev parent reply other threads:[~2020-01-14 16:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-16 11:56 [PATCH v5 0/3] arm64: Workaround for Cortex-A55 erratum 1530923 Steven Price
2019-12-16 11:56 ` [PATCH v5 1/3] arm64: Rename WORKAROUND_1165522 to SPECULATIVE_AT_VHE Steven Price
2019-12-16 11:56 ` [PATCH v5 2/3] arm64: Rename WORKAROUND_1319367 to SPECULATIVE_AT_NVHE Steven Price
2019-12-16 11:56 ` [PATCH v5 3/3] arm64: Workaround for Cortex-A55 erratum 1530923 Steven Price
2020-01-14 16:45 ` Will Deacon [this message]
2020-01-16 7:28 ` [PATCH v5 0/3] " Marc Zyngier
2020-01-16 10:47 ` Will Deacon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200114164543.GD2579@willie-the-truck \
--to=will@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maz@kernel.org \
--cc=steven.price@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).