From: Bjorn Helgaas <helgaas@kernel.org>
To: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: virtio-dev@lists.oasis-open.org, kevin.tian@intel.com,
mst@redhat.com, linux-pci@vger.kernel.org,
virtualization@lists.linux-foundation.org,
iommu@lists.linux-foundation.org, sebastien.boeuf@intel.com,
bhelgaas@google.com, jasowang@redhat.com
Subject: Re: [PATCH v3 5/6] iommu/virtio: Support topology description in config space
Date: Fri, 25 Sep 2020 10:34:55 -0500 [thread overview]
Message-ID: <20200925153455.GA2437869@bjorn-Precision-5520> (raw)
In-Reply-To: <20200925081243.GA490533@myrica>
On Fri, Sep 25, 2020 at 10:12:43AM +0200, Jean-Philippe Brucker wrote:
> On Thu, Sep 24, 2020 at 10:22:03AM -0500, Bjorn Helgaas wrote:
> > On Fri, Aug 21, 2020 at 03:15:39PM +0200, Jean-Philippe Brucker wrote:
> > > + /* Perform the init sequence before we can read the config */
> > > + ret = viommu_pci_reset(common_cfg);
> >
> > I guess this is some special device-specific reset, not any kind of
> > standard PCI reset?
>
> Yes it's the virtio reset - writing 0 to the status register in the BAR.
I wonder if this should be named something like viommu_virtio_reset(),
so there's no confusion with PCI resets and all the timing
restrictions, config space restoration, etc. associated with them.
Bjorn
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next prev parent reply other threads:[~2020-09-25 15:35 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-21 13:15 [PATCH v3 0/6] Add virtio-iommu built-in topology Jean-Philippe Brucker
2020-08-21 13:15 ` [PATCH v3 1/6] iommu/virtio: Move to drivers/iommu/virtio/ Jean-Philippe Brucker
2020-09-04 15:29 ` Auger Eric
2020-08-21 13:15 ` [PATCH v3 2/6] iommu/virtio: Add topology helpers Jean-Philippe Brucker
2020-09-04 16:22 ` Auger Eric
2020-09-24 8:31 ` Jean-Philippe Brucker
2020-08-21 13:15 ` [PATCH v3 3/6] PCI: Add DMA configuration for virtual platforms Jean-Philippe Brucker
2020-08-21 13:15 ` [PATCH v3 4/6] iommu/virtio: Add topology definitions Jean-Philippe Brucker
2020-09-04 15:30 ` Auger Eric
2020-08-21 13:15 ` [PATCH v3 5/6] iommu/virtio: Support topology description in config space Jean-Philippe Brucker
2020-09-04 16:05 ` Auger Eric
2020-09-24 8:33 ` Jean-Philippe Brucker
2020-09-24 15:22 ` Bjorn Helgaas
2020-09-25 8:12 ` Jean-Philippe Brucker
2020-09-25 15:34 ` Bjorn Helgaas [this message]
2020-08-21 13:15 ` [PATCH v3 6/6] iommu/virtio: Enable x86 support Jean-Philippe Brucker
2020-08-26 13:26 ` [PATCH v3 0/6] Add virtio-iommu built-in topology Michael S. Tsirkin
2020-08-27 8:01 ` Jean-Philippe Brucker
2020-09-04 16:24 ` Auger Eric
2020-09-24 9:00 ` Michael S. Tsirkin
2020-09-24 9:21 ` Joerg Roedel
2020-09-24 9:38 ` Michael S. Tsirkin
2020-09-24 9:54 ` Auger Eric
2020-09-29 17:28 ` Al Stone
2020-10-02 18:23 ` Al Stone
2020-10-06 15:23 ` Auger Eric
2020-11-03 20:09 ` Al Stone
2020-11-04 9:33 ` Jean-Philippe Brucker
2020-11-04 20:56 ` Al Stone
2020-09-24 10:02 ` Joerg Roedel
2020-09-24 10:24 ` Gerd Hoffmann
2020-09-24 10:29 ` Jean-Philippe Brucker
2020-09-24 11:50 ` Joerg Roedel
2020-09-24 12:41 ` Michael S. Tsirkin
2020-09-24 12:50 ` Joerg Roedel
2020-09-25 10:22 ` Michael S. Tsirkin
2020-09-25 8:48 ` Jean-Philippe Brucker
2020-09-25 10:22 ` Michael S. Tsirkin
2020-09-25 11:26 ` Jean-Philippe Brucker
2020-09-25 13:44 ` Michael S. Tsirkin
2020-09-25 14:14 ` [virtio-dev] " Gerd Hoffmann
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