From: "Benoît Canet" <benoit.canet@irqsave.net>
To: linux-pci@vger.kernel.org, qemu-devel@nongnu.org,
iommu@lists.linux-foundation.org, alex.williamson@redhat.com
Subject: SR-IOV PF reset and QEMU VFs VFIO passthrough
Date: Sat, 1 Jun 2013 14:13:21 +0200 [thread overview]
Message-ID: <20130601121320.GC5157@irqsave.net> (raw)
Hello,
I may have soon the PF driver of an SR-IOV card to code and make work with
QEMU/KVM so I have the following questions.
In an AMD64 setup where QEMU use VFIO to passthrough the VFs of an SR-IOV card
to a guest will the consequences of a PF FLR be handled fine by QEMU and the
guest ?
I read that pci_reset_function would call pci_restore_state restoring the SR-IOV
configuration after the reset of the PF.
The ways the hardware work means that the VFs would disappear and reappear in a
short lapse of time.
Will these events be handled by the kernel pci hotplug code ?
Given that the PF driver restore the PF config space after the reset will /sys
files used by QEMU disappear and reappear messing the QEMU VFIO passthrough or
will it goes smoothly ?
Best regards
Benoît Canet
next reply other threads:[~2013-06-01 12:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-01 12:13 Benoît Canet [this message]
2013-06-02 14:11 ` SR-IOV PF reset and QEMU VFs VFIO passthrough Alex Williamson
2013-06-02 15:13 ` [Qemu-devel] " Benoît Canet
2013-06-03 18:41 ` Don Dutile
2013-06-03 19:29 ` Benoît Canet
2013-06-03 20:55 ` Don Dutile
2013-06-03 21:27 ` Benoît Canet
2013-06-03 21:42 ` Don Dutile
2013-06-03 21:58 ` Benoît Canet
2013-06-03 22:03 ` Don Dutile
2013-06-04 15:54 ` Benoît Canet
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