From: Oliver Upton <oliver.upton@linux.dev>
To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>,
Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>, Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Mark Brown <broonie@kernel.org>
Subject: Re: [PATCH 0/2] KVM: arm64: Fix HCRX_EL2.GCSEn handling
Date: Wed, 7 May 2025 00:56:48 -0700 [thread overview]
Message-ID: <174660459090.2542293.10603043906149596192.b4-ty@linux.dev> (raw)
In-Reply-To: <20250430105916.3815157-1-maz@kernel.org>
On Wed, 30 Apr 2025 11:59:14 +0100, Marc Zyngier wrote:
> Will points out[1] that GCS is completely busted on the host if we
> ever run a guest, as HCRX_EL2 gets set to a fixed value on vcpu exit,
> value that doesn't include the GCSEn bit. This is likely to kaboom on
> a nVHE/hVHE setup.
>
> Obviously, nobody ever tested this.
>
> [...]
Applied to fixes, thanks!
[1/2] KVM: arm64: Properly save/restore HCRX_EL2
https://git.kernel.org/kvmarm/kvmarm/c/ffea7c73d181
[2/2] KVM: arm64: Kill HCRX_HOST_FLAGS
https://git.kernel.org/kvmarm/kvmarm/c/ef296ee98bb1
--
Best,
Oliver
prev parent reply other threads:[~2025-05-07 7:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-30 10:59 [PATCH 0/2] KVM: arm64: Fix HCRX_EL2.GCSEn handling Marc Zyngier
2025-04-30 10:59 ` [PATCH 1/2] KVM: arm64: Properly save/restore HCRX_EL2 Marc Zyngier
2025-04-30 10:59 ` [PATCH 2/2] KVM: arm64: Kill HCRX_HOST_FLAGS Marc Zyngier
2025-05-07 7:56 ` Oliver Upton [this message]
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=174660459090.2542293.10603043906149596192.b4-ty@linux.dev \
--to=oliver.upton@linux.dev \
--cc=broonie@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=joey.gouly@arm.com \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=maz@kernel.org \
--cc=suzuki.poulose@arm.com \
--cc=will@kernel.org \
--cc=yuzenghui@huawei.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