From: Oliver Upton <oliver.upton@linux.dev>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
kvm@vger.kernel.org, Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Bjorn Andersson <andersson@kernel.org>,
Christoffer Dall <christoffer.dall@arm.com>
Subject: Re: [PATCH 06/11] KVM: arm64: nv: Acceletate EL0 counter accesses from hypervisor context
Date: Thu, 5 Dec 2024 09:07:57 -0800 [thread overview]
Message-ID: <Z1Hd7U5gZS1RDxop@linux.dev> (raw)
In-Reply-To: <86ikrytmr6.wl-maz@kernel.org>
On Thu, Dec 05, 2024 at 11:03:41AM +0000, Marc Zyngier wrote:
> On Thu, 05 Dec 2024 00:37:34 +0000,
> Oliver Upton <oliver.upton@linux.dev> wrote:
> >
> > typo: accelerate
>
> Huh, thanks!
>
> >
> > On Mon, Dec 02, 2024 at 05:21:29PM +0000, Marc Zyngier wrote:
>
> [...]
>
> > > + case SYS_CNTVCT_EL0:
> > > + case SYS_CNTVCTSS_EL0:
> > > + /* If !ELIsInHost(EL2), the guest's CNTVOFF_EL2 applies */
> >
> > !ELIsInHost(EL0)
>
> No, and that's the whole point. CNTVOFF_EL2 applies at all times when
> HCR_EL2==0 and that we're at EL2. From the pseudocode for CNTVCT_EL0:
Dammit, I don't know how many times I misread "CNTPCT" here rather than
CNTVCT. Sorry for the noise.
--
Thanks,
Oliver
next prev parent reply other threads:[~2024-12-05 17:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-02 17:21 [PATCH 00/11] KVM: arm64: Add NV timer support Marc Zyngier
2024-12-02 17:21 ` [PATCH 01/11] KVM: arm64: nv: Add handling of EL2-specific timer registers Marc Zyngier
2024-12-02 17:21 ` [PATCH 02/11] KVM: arm64: nv: Sync nested timer state with FEAT_NV2 Marc Zyngier
2024-12-05 0:26 ` Oliver Upton
2024-12-02 17:21 ` [PATCH 03/11] KVM: arm64: nv: Publish emulated timer interrupt state in the in-memory state Marc Zyngier
2024-12-02 17:21 ` [PATCH 04/11] KVM: arm64: nv: Use FEAT_ECV to trap access to EL0 timers Marc Zyngier
2024-12-02 17:21 ` [PATCH 05/11] KVM: arm64: nv: Accelerate EL0 timer read accesses when FEAT_ECV in use Marc Zyngier
2024-12-02 17:21 ` [PATCH 06/11] KVM: arm64: nv: Acceletate EL0 counter accesses from hypervisor context Marc Zyngier
2024-12-05 0:37 ` Oliver Upton
2024-12-05 11:03 ` Marc Zyngier
2024-12-05 17:07 ` Oliver Upton [this message]
2024-12-05 12:07 ` Joey Gouly
2024-12-05 13:31 ` Marc Zyngier
2024-12-02 17:21 ` [PATCH 07/11] KVM: arm64: Handle counter access early in non-HYP context Marc Zyngier
2024-12-02 17:21 ` [PATCH 08/11] KVM: arm64: nv: Add trap routing for CNTHCTL_EL2.EL1{NVPCT,NVVCT,TVT,TVCT} Marc Zyngier
2024-12-02 17:21 ` [PATCH 09/11] KVM: arm64: nv: Propagate CNTHCTL_EL2.EL1NV{P,V}CT bits Marc Zyngier
2024-12-02 17:21 ` [PATCH 10/11] KVM: arm64: nv: Sanitise CNTHCTL_EL2 Marc Zyngier
2024-12-02 17:21 ` [PATCH 11/11] KVM: arm64: Work around x1e's CNTVOFF_EL2 bogosity Marc Zyngier
2024-12-05 0:40 ` [PATCH 00/11] KVM: arm64: Add NV timer support Oliver Upton
2024-12-09 14:24 ` Chase Conklin
2024-12-09 15:15 ` 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=Z1Hd7U5gZS1RDxop@linux.dev \
--to=oliver.upton@linux.dev \
--cc=andersson@kernel.org \
--cc=christoffer.dall@arm.com \
--cc=joey.gouly@arm.com \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.