From: Marc Zyngier <marc.zyngier@arm.com>
To: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Subject: [PATCH 0/4] Workaround for Cortex-A76 erratum 1165522
Date: Mon, 5 Nov 2018 14:36:12 +0000 [thread overview]
Message-ID: <20181105143617.120602-1-marc.zyngier@arm.com> (raw)
Early Cortex-A76 suffer from an erratum that can result in invalid
TLBs when the CPU speculatively executes an AT instruction in the
middle of a guest world switch, while the guest virtual memory
configuration is in an inconsistent state.
We handle this issue by mandating the use of VHE and making sure that
the guest context is fully installed before switching HCR_EL2.TGE to
zero. This ensures that a speculated AT instruction is either executed
on the host context (TGE set) or the guest context (TGE clear), and
that there is no intermediate state.
Marc Zyngier (4):
KVM: arm64: Rework detection of SVE, !VHE systems
KVM: arm64: Allow implementations to be confined to using VHE
arm64: KVM: Install stage-2 translation before enabling traps on VHE
arm64: KVM: Implement workaround for Cortex-A76 erratum 1165522
Documentation/arm64/silicon-errata.txt | 1 +
arch/arm/include/asm/kvm_host.h | 3 ++-
arch/arm64/Kconfig | 12 ++++++++++++
arch/arm64/include/asm/cpucaps.h | 3 ++-
arch/arm64/include/asm/kvm_host.h | 14 ++++++++++----
arch/arm64/include/asm/kvm_hyp.h | 6 ++++++
arch/arm64/kernel/cpu_errata.c | 8 ++++++++
arch/arm64/kvm/hyp/switch.c | 16 +++++++++++++++-
virt/kvm/arm/arm.c | 17 ++++++++++++-----
9 files changed, 68 insertions(+), 12 deletions(-)
--
2.19.1
next reply other threads:[~2018-11-05 14:36 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-05 14:36 Marc Zyngier [this message]
2018-11-05 14:36 ` [PATCH 1/4] KVM: arm64: Rework detection of SVE, !VHE systems Marc Zyngier
2018-11-06 7:52 ` Christoffer Dall
2018-11-08 19:14 ` Dave Martin
2018-11-05 14:36 ` [PATCH 2/4] KVM: arm64: Allow implementations to be confined to using VHE Marc Zyngier
2018-11-06 7:53 ` Christoffer Dall
2018-11-08 17:51 ` Marc Zyngier
2018-11-08 19:23 ` Dave Martin
2018-11-05 14:36 ` [PATCH 3/4] arm64: KVM: Install stage-2 translation before enabling traps on VHE Marc Zyngier
2018-11-06 8:06 ` Christoffer Dall
2018-11-08 17:54 ` Marc Zyngier
2018-11-05 14:36 ` [PATCH 4/4] arm64: KVM: Implement workaround for Cortex-A76 erratum 1165522 Marc Zyngier
2018-11-05 18:34 ` James Morse
2018-11-08 17:18 ` Marc Zyngier
2018-11-09 11:39 ` James Morse
2018-11-06 8:15 ` Christoffer Dall
2018-11-08 18:05 ` Marc Zyngier
2018-11-08 20:10 ` Christoffer Dall
2018-11-22 16:13 ` Marc Zyngier
2018-11-23 9:57 ` Christoffer Dall
2018-11-21 12:23 ` Julien Grall
2018-11-21 12:58 ` Marc Zyngier
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=20181105143617.120602-1-marc.zyngier@arm.com \
--to=marc.zyngier@arm.com \
--cc=catalin.marinas@arm.com \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=will.deacon@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).