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From: "Tian, Kevin" <kevin.tian@intel.com>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
	David Woodhouse <dwmw2@infradead.org>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.com>,
	Jonathan Cameron <jic23@kernel.org>
Subject: RE: [PATCH v7 09/11] iommu/vt-d: Add bind guest PASID support
Date: Tue, 29 Oct 2019 07:57:21 +0000
Message-ID: <AADFC41AFE54684AB9EE6CBC0274A5D19D5DE3D3@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <20191028090231.4777c6a9@jacob-builder>

> From: Jacob Pan [mailto:jacob.jun.pan@linux.intel.com]
> Sent: Tuesday, October 29, 2019 12:03 AM
> 
> On Mon, 28 Oct 2019 06:03:36 +0000
> "Tian, Kevin" <kevin.tian@intel.com> wrote:
> 
> > > > > +	.sva_bind_gpasid	= intel_svm_bind_gpasid,
> > > > > +	.sva_unbind_gpasid	= intel_svm_unbind_gpasid,
> > > > > +#endif
> > > >
> > > > again, pure PASID management logic should be separated from SVM.
> > > >
> > > I am not following, these two functions are SVM functionality, not
> > > pure PASID management which is already separated in ioasid.c
> >
> > I should say pure "scalable mode" logic. Above callbacks are not
> > related to host SVM per se. They are serving gpasid requests from
> > guest side, thus part of generic scalable mode capability.
> Got your point, but we are sharing data structures with host SVM, it is
> very difficult and inefficient to separate the two.

I don't think difficulty is the reason against such direction. We need 
do things right. :-) I'm fine with putting it in a TODO list, but at least
need the right information in the 1st place to tell that current way
is just a short-term approach, and we should revisit later.

thanks
Kevin

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  reply index

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-24 19:54 [PATCH v7 00/11] Nested Shared Virtual Address (SVA) VT-d support Jacob Pan
2019-10-24 19:54 ` [PATCH v7 01/11] iommu/vt-d: Cache virtual command capability register Jacob Pan
2019-10-25  2:53   ` Lu Baolu
2019-10-25  6:06   ` Tian, Kevin
2019-11-08 10:32   ` Auger Eric
2019-10-24 19:54 ` [PATCH v7 02/11] iommu/vt-d: Enlightened PASID allocation Jacob Pan
2019-10-25  6:19   ` Tian, Kevin
2019-10-29 17:14     ` Jacob Pan
2019-10-29 18:16       ` Tian, Kevin
2019-11-08 10:33   ` Auger Eric
2019-11-08 22:22     ` Jacob Pan
2019-10-24 19:54 ` [PATCH v7 03/11] iommu/vt-d: Add custom allocator for IOASID Jacob Pan
2019-10-25  2:30   ` Lu Baolu
2019-10-25  4:43     ` Jacob Pan
2019-10-25  6:40       ` Tian, Kevin
2019-10-25 14:39         ` Lu Baolu
2019-10-25 15:52           ` Tian, Kevin
2019-10-28 22:49             ` Jacob Pan
2019-10-29  2:22               ` Lu Baolu
2019-10-25  6:31   ` Tian, Kevin
2019-10-28 22:52     ` Jacob Pan
2019-11-08 10:40   ` Auger Eric
2019-11-08 22:26     ` Jacob Pan
2019-10-24 19:54 ` [PATCH v7 04/11] iommu/vt-d: Replace Intel specific PASID allocator with IOASID Jacob Pan
2019-10-25  5:47   ` Lu Baolu
2019-11-01 18:29     ` Jacob Pan
2019-10-25  6:41   ` Tian, Kevin
2019-10-28 22:46     ` Jacob Pan
2019-11-08 11:30   ` Auger Eric
2019-11-08 22:55     ` Jacob Pan
2019-11-12  9:54       ` Auger Eric
2019-10-24 19:54 ` [PATCH v7 05/11] iommu/vt-d: Move domain helper to header Jacob Pan
2019-10-25  5:26   ` Lu Baolu
2019-10-24 19:54 ` [PATCH v7 06/11] iommu/vt-d: Avoid duplicated code for PASID setup Jacob Pan
2019-10-25  5:32   ` Lu Baolu
2019-10-25  6:42   ` Tian, Kevin
2019-10-28 22:41     ` Jacob Pan
2019-11-12  9:54   ` Auger Eric
2019-10-24 19:55 ` [PATCH v7 07/11] iommu/vt-d: Add nested translation helper function Jacob Pan
2019-10-25  7:04   ` Tian, Kevin
2019-11-01 21:10     ` Jacob Pan
2019-10-25 15:04   ` Lu Baolu
2019-10-25 16:06     ` Jacob Pan
2019-11-08 13:55   ` Auger Eric
2019-10-24 19:55 ` [PATCH v7 08/11] iommu/vt-d: Misc macro clean up for SVM Jacob Pan
2019-10-26  1:00   ` Lu Baolu
2019-10-28 22:38     ` Jacob Pan
2019-10-24 19:55 ` [PATCH v7 09/11] iommu/vt-d: Add bind guest PASID support Jacob Pan
2019-10-25  7:19   ` Tian, Kevin
2019-10-25 17:33     ` Jacob Pan
2019-10-28  6:03       ` Tian, Kevin
2019-10-28 16:02         ` Jacob Pan
2019-10-29  7:57           ` Tian, Kevin [this message]
2019-10-29 16:11             ` Jacob Pan
2019-10-29 18:04               ` Tian, Kevin
2019-10-29  2:33         ` Lu Baolu
2019-10-26  2:01   ` Lu Baolu
2019-10-28 22:29     ` Jacob Pan
2019-10-29  2:54       ` Lu Baolu
2019-10-29  4:11         ` Jacob Pan
2019-10-29  5:04           ` Lu Baolu
2019-10-24 19:55 ` [PATCH v7 10/11] iommu/vt-d: Support flushing more translation cache types Jacob Pan
2019-10-25  7:21   ` Tian, Kevin
2019-11-01 21:30     ` Jacob Pan
2019-10-26  2:22   ` Lu Baolu
2019-11-01 21:28     ` Jacob Pan
2019-11-08 16:18   ` Auger Eric
2019-11-08 23:05     ` Jacob Pan
2019-10-24 19:55 ` [PATCH v7 11/11] iommu/vt-d: Add svm/sva invalidate function Jacob Pan
2019-10-25  7:27   ` Tian, Kevin
2019-10-26  2:40     ` Lu Baolu
2019-10-26  7:03       ` Lu Baolu
2019-10-28  6:06         ` Tian, Kevin
2019-10-28 16:10           ` Jacob Pan
2019-10-29 18:52             ` Tian, Kevin
2019-10-29 19:25               ` Jacob Pan
2019-10-28 16:13     ` Jacob Pan
2019-11-12 10:28   ` Auger Eric

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