From: Oliver Upton <oliver.upton@linux.dev>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Linux Kernel Functional Testing <lkft@linaro.org>
Subject: Re: [PATCH] KVM: arm64: Convert timer offset VA when accessed in HYP code
Date: Wed, 12 Feb 2025 13:01:11 -0800 [thread overview]
Message-ID: <Z60MF6KLM44-Gnu1@linux.dev> (raw)
In-Reply-To: <20250212173454.2864462-1-maz@kernel.org>
On Wed, Feb 12, 2025 at 05:34:54PM +0000, Marc Zyngier wrote:
> Now that EL2 has gained some early timer emulation, it accesses
> the offsets pointed to by the timer structure, both of which
> live in the KVM structure.
>
> Of course, these are *kernel* pointers, so the dereferencing
> of these pointers in non-kernel code must be itself be offset.
>
> Given switch.h its own version of timer_get_offset() and use that
> instead.
>
> Fixes: b86fc215dc26d ("KVM: arm64: Handle counter access early in non-HYP context")
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
next prev parent reply other threads:[~2025-02-12 21:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-12 17:34 [PATCH] KVM: arm64: Convert timer offset VA when accessed in HYP code Marc Zyngier
2025-02-12 21:01 ` Oliver Upton [this message]
2025-02-13 9:59 ` Anders Roxell
2025-02-13 11:06 ` 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=Z60MF6KLM44-Gnu1@linux.dev \
--to=oliver.upton@linux.dev \
--cc=joey.gouly@arm.com \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=lkft@linaro.org \
--cc=maz@kernel.org \
--cc=suzuki.poulose@arm.com \
--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;
as well as URLs for NNTP newsgroup(s).