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From: "Tian, Kevin" <kevin.tian@intel.com>
To: "kraxel@redhat.com" <kraxel@redhat.com>,
	"Zhang, Tina" <tina.zhang@intel.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Zhenyu Wang <zhenyuw@linux.intel.com>,
	"Yuan, Hang" <hang.yuan@intel.com>,
	"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
	"Lv, Zhiyuan" <zhiyuan.lv@intel.com>,
	"intel-gvt-dev@lists.freedesktop.org" 
	<intel-gvt-dev@lists.freedesktop.org>,
	"Wang, Zhi A" <zhi.a.wang@intel.com>
Subject: RE: [RFC PATCH v2 1/3] vfio: Use capability chains to handle device specific irq
Date: Thu, 6 Jun 2019 02:57:38 +0000	[thread overview]
Message-ID: <AADFC41AFE54684AB9EE6CBC0274A5D19CA6BA5F@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <20190605100942.bceke6yqjynuwk3z@sirius.home.kraxel.org>

> From: kraxel@redhat.com
> Sent: Wednesday, June 5, 2019 6:10 PM
> 
>   Hi,
> 
> > > Really need to split for different planes? I'd like a
> > > VFIO_IRQ_SUBTYPE_GFX_DISPLAY_EVENT
> > > so user space can probe change for all.
> 
> > User space can choose to user different handlers according to the
> > specific event. For example, user space might not want to handle every
> > cursor event due to performance consideration. Besides, it can reduce
> > the probe times, as we don't need to probe twice to make sure if both
> > cursor plane and primary plane have been updated.
> 
> I'd suggest to use the value passed via eventfd for that, i.e. instead
> of sending "1" unconditionally send a mask of changed planes.
> 

sounds reasonable.

  reply	other threads:[~2019-06-06  2:57 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-04  9:55 [RFC PATCH v2 0/3] Deliver vGPU page flip events to userspace Tina Zhang
2019-06-04  9:55 ` [RFC PATCH v2 1/3] vfio: Use capability chains to handle device specific irq Tina Zhang
2019-06-05  4:04   ` Zhenyu Wang
2019-06-05  9:18     ` Zhang, Tina
2019-06-05 10:09       ` kraxel
2019-06-06  2:57         ` Tian, Kevin [this message]
2019-06-06 10:17         ` Zhang, Tina
2019-06-06 16:25           ` Alex Williamson
2019-06-04  9:55 ` [RFC PATCH v2 2/3] drm/i915/gvt: Leverage irq capability chain to get eventfd Tina Zhang
2019-06-04  9:55 ` [RFC PATCH v2 3/3] drm/i915/gvt: Send plane flip events to user space Tina Zhang

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