From: christoffer.dall@linaro.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 10/10] KVM: arm/arm64: vgic: Allow non-shared device HW interrupts
Date: Tue, 30 Jun 2015 22:19:03 +0200 [thread overview]
Message-ID: <20150630201903.GX11332@cbox> (raw)
In-Reply-To: <1433783045-8002-11-git-send-email-marc.zyngier@arm.com>
On Mon, Jun 08, 2015 at 06:04:05PM +0100, Marc Zyngier wrote:
> So far, the only use of the HW interrupt facility is the timer,
> implying that the active state is context-switched for each vcpu,
> as the device is is shared across all vcpus.
>
> This does not work for a device that has been assigned to a VM,
> as the guest is entierely in control of that device (the HW is
> not shared). In that case, it makes sense to bypass the whole
> active state switchint, and only track the deactivation of the
> interrupt.
>
The discinction here between shared and non-shared feels a bit arbitrary
(it may not be, but just feel that way) and I can't easily convince
myself that this is the logical/correct/all-encompassing word to
describe the nature of the two devices.
Meh, not the most productive comment, I know...
-Christoffer
next prev parent reply other threads:[~2015-06-30 20:19 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-08 17:03 [PATCH 00/10] arm/arm64: KVM: Active interrupt state switching for shared devices Marc Zyngier
2015-06-08 17:03 ` [PATCH 01/10] arm/arm64: KVM: Fix ordering of timer/GIC on guest entry Marc Zyngier
2015-06-09 11:29 ` Alex Bennée
2015-06-30 20:19 ` Christoffer Dall
2015-06-08 17:03 ` [PATCH 02/10] arm/arm64: KVM: Move vgic handling to a non-preemptible section Marc Zyngier
2015-06-09 11:38 ` Alex Bennée
2015-06-30 20:19 ` Christoffer Dall
2015-06-08 17:03 ` [PATCH 03/10] KVM: arm/arm64: vgic: Convert struct vgic_lr to use bitfields Marc Zyngier
2015-06-09 13:12 ` Alex Bennée
2015-06-10 17:23 ` Andre Przywara
2015-06-10 18:04 ` Marc Zyngier
2015-06-08 17:03 ` [PATCH 04/10] KVM: arm/arm64: vgic: Allow HW irq to be encoded in LR Marc Zyngier
2015-06-09 13:21 ` Alex Bennée
2015-06-09 14:03 ` Marc Zyngier
2015-06-17 11:53 ` Eric Auger
2015-06-17 12:39 ` Marc Zyngier
2015-06-17 13:21 ` Peter Maydell
2015-06-17 13:34 ` Marc Zyngier
2015-06-08 17:04 ` [PATCH 05/10] KVM: arm/arm64: vgic: Relax vgic_can_sample_irq for edge IRQs Marc Zyngier
2015-06-30 20:19 ` Christoffer Dall
2015-07-01 9:17 ` Marc Zyngier
2015-07-01 11:58 ` Christoffer Dall
2015-07-01 18:18 ` Marc Zyngier
2015-07-02 16:23 ` Christoffer Dall
2015-07-03 9:50 ` Marc Zyngier
2015-07-03 9:57 ` Peter Maydell
2015-06-08 17:04 ` [PATCH 06/10] KVM: arm/arm64: vgic: Allow dynamic mapping of physical/virtual interrupts Marc Zyngier
2015-06-11 8:43 ` Andre Przywara
2015-06-11 8:56 ` Marc Zyngier
2015-06-15 15:44 ` Eric Auger
2015-06-16 8:28 ` Marc Zyngier
2015-06-16 9:10 ` Eric Auger
2015-06-30 20:19 ` Christoffer Dall
2015-07-01 10:20 ` Marc Zyngier
2015-07-01 11:45 ` Christoffer Dall
2015-06-08 17:04 ` [PATCH 07/10] KVM: arm/arm64: vgic: Allow HW interrupts to be queued to a guest Marc Zyngier
2015-06-11 8:44 ` Andre Przywara
2015-06-11 9:15 ` Marc Zyngier
2015-06-11 9:44 ` Andre Przywara
2015-06-11 10:02 ` Marc Zyngier
2015-06-15 16:11 ` Eric Auger
2015-06-17 11:51 ` Eric Auger
2015-06-17 12:23 ` Marc Zyngier
2015-06-08 17:04 ` [PATCH 08/10] KVM: arm/arm64: vgic: Add vgic_{get, set}_phys_irq_active Marc Zyngier
2015-06-17 15:11 ` Eric Auger
2015-06-08 17:04 ` [PATCH 09/10] KVM: arm/arm64: timer: Allow the timer to control the active state Marc Zyngier
2015-06-08 17:04 ` [PATCH 10/10] KVM: arm/arm64: vgic: Allow non-shared device HW interrupts Marc Zyngier
2015-06-17 15:11 ` Eric Auger
2015-06-17 15:37 ` Marc Zyngier
2015-06-17 15:50 ` Eric Auger
2015-06-18 8:37 ` Marc Zyngier
2015-06-18 17:51 ` Eric Auger
2015-06-30 20:19 ` Christoffer Dall [this message]
2015-07-01 8:26 ` Marc Zyngier
2015-07-01 8:57 ` Christoffer Dall
2015-06-10 8:33 ` [PATCH 00/10] arm/arm64: KVM: Active interrupt state switching for shared devices Eric Auger
2015-06-10 9:03 ` Marc Zyngier
2015-06-10 11:13 ` Eric Auger
2015-06-18 6:51 ` Eric Auger
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=20150630201903.GX11332@cbox \
--to=christoffer.dall@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
/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).