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    SubjectRe: [PATCH v10 0/7] PCI: Linux kernel SR-IOV support
    Date
    On Sunday 08 March 2009 22:30:16 Avi Kivity wrote:
    > Matthew Wilcox wrote:
    > > On Tue, Feb 24, 2009 at 12:47:38PM +0200, Avi Kivity wrote:
    > >> Do those patches allow using a VF on the host (in other words, does the
    > >> kernel emulate config space accesses)?
    > >
    > > SR-IOV hardware handles config space accesses to virtual functions. No
    > > kernel changes needed for that aspect of it.
    >
    > Patches 2 and 3 of the patchset that enables SR/IOV in kvm [1] suggest
    > that at the config space is only partially implemented.
    >
    > [1] http://thread.gmane.org/gmane.comp.emulators.kvm.devel/29034

    Hi Avi

    For kernel side, patch 2 is not necessary. Because kernel would read VID/DID
    directly from pci_dev rather than configuration space, which have been set
    properly already.

    And very sorry, for the patch 3. We haven't known exactly what's happened. I
    think the problem is caused by guest driver, but didn't confirm(and I have
    some misunderstandings with ZhaoYu for I thought we are agree on the reason,
    but after confirm with him, he didn't agree). I am doing more investigations
    to find the real cause.

    --
    regards
    Yang, Sheng


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