From: cdall@linaro.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 8/9] KVM: arm/arm64: vgic: Don't check vgic_initialized in flush_hwstate
Date: Tue, 21 Mar 2017 13:30:51 +0100 [thread overview]
Message-ID: <20170321123051.GF15920@cbox> (raw)
In-Reply-To: <96b0efe2-d764-7b52-8335-0383a9357a1f@arm.com>
On Tue, Mar 21, 2017 at 12:08:15PM +0000, Marc Zyngier wrote:
> On 20/03/17 10:58, Christoffer Dall wrote:
> > Now when we do an early init of the static parts of the VGIC data
> > structures, we can do things like checking if the AP lists are empty
> > directly without having to explicitly check if the vgic is initialized
> > and reduce a bit of work in our criticial path.
>
> critical
>
> > Note: list_empty is a single atomic read (uses READ_ONCE) and can
> > therefore check if a list is empty or not without the need to take the
> > spinlock protecting the list.
>
> This note might be better placed in patch #2.
Agreed.
>
> >
> > Signed-off-by: Christoffer Dall <cdall@linaro.org>
>
> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
>
Thanks,
-Christoffer
next prev parent reply other threads:[~2017-03-21 12:30 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-20 10:58 [PATCH 0/9] KVM: arm/arm64: vgic: Improvements and optimizations Christoffer Dall
2017-03-20 10:58 ` [PATCH 1/9] KVM: arm/arm64: vgic: Defer touching GICH_VMCR to vcpu_load/put Christoffer Dall
2017-03-21 10:29 ` Marc Zyngier
2017-03-21 11:16 ` Christoffer Dall
2017-03-20 10:58 ` [PATCH 2/9] KVM: arm/arm64: vgic: Avoid flushing vgic state when there's no pending IRQ Christoffer Dall
2017-03-21 10:57 ` Marc Zyngier
2017-03-21 11:17 ` Christoffer Dall
2017-03-20 10:58 ` [PATCH 3/9] KVM: arm/arm64: vgic: Get rid of live_lrs Christoffer Dall
2017-03-21 11:06 ` Marc Zyngier
2017-03-20 10:58 ` [PATCH 4/9] KVM: arm/arm64: vgic: Get rid of unnecessary process_maintenance operation Christoffer Dall
2017-03-21 11:36 ` Marc Zyngier
2017-03-21 12:26 ` [PATCH 4/9] KVM: arm/arm64: vgic: Get rid of unnecessary process_maintenance operationjjjj Christoffer Dall
2017-03-21 13:26 ` Marc Zyngier
2017-03-21 14:10 ` Christoffer Dall
2017-03-20 10:58 ` [PATCH 5/9] KVM: arm/arm64: vgic: Get rid of unnecessary save_maint_int_state Christoffer Dall
2017-03-21 11:44 ` Marc Zyngier
2017-03-20 10:58 ` [PATCH 6/9] KVM: arm/arm64: vgic: Get rid of MISR and EISR fields Christoffer Dall
2017-03-21 11:45 ` Marc Zyngier
2017-03-20 10:58 ` [PATCH 7/9] KVM: arm/arm64: vgic: Implement early VGIC init functionality Christoffer Dall
2017-03-21 12:05 ` Marc Zyngier
2017-03-21 12:29 ` Christoffer Dall
2017-03-21 13:30 ` Marc Zyngier
2017-03-20 10:58 ` [PATCH 8/9] KVM: arm/arm64: vgic: Don't check vgic_initialized in flush_hwstate Christoffer Dall
2017-03-21 12:08 ` Marc Zyngier
2017-03-21 12:30 ` Christoffer Dall [this message]
2017-03-20 10:58 ` [PATCH 9/9] KVM: arm/arm64: vgic: Improve sync_hwstate performance Christoffer Dall
2017-03-21 13:29 ` Marc Zyngier
2017-03-21 14:13 ` Christoffer Dall
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