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Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset |
Date: |
Sun, 06 Oct 2013 22:34:53 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
Il 06/10/2013 20:28, Michael S. Tsirkin ha scritto:
> > > > For each PCI device I tried creating a VM with an instance of it (a few
> > > > devices at a time), and did VM resets. Earlier versions were tested by
> > > > the guy who reported the SCSI problems.
> > >
> > > x86 kvm only?
> >
> > Yes.
>
> Hmm, I'm not sure that's enough for this kind of change.
I'll do more tests though, from looking at the source code, I'm not sure
what could happen depending on the host bridge. To make it clearer, the
difference is that pre-patch you have
device-level reset for device 1
bus-level reset for device 1
device-level reset for device 2
bus-level reset for device 2
device-level reset for device 3
bus-level reset for device 3
and afterwards you have
device-level reset for device 1
device-level reset for device 2
device-level reset for device 3
bus-level reset for device 1
bus-level reset for device 2
bus-level reset for device 3
I could also preserve exactly the same semantics if you prefer. The
patch is a bit more complicated, but it's doable.
Paolo
- [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset, Paolo Bonzini, 2013/10/03
- [Qemu-devel] [PATCH 1/4] pci: do not export pci_bus_reset, Paolo Bonzini, 2013/10/03
- [Qemu-devel] [PATCH 2/4] pci: clean up resetting of IRQs, Paolo Bonzini, 2013/10/03
- [Qemu-devel] [PATCH 3/4] qdev: allow both pre- and post-order vists in qdev walking functions, Paolo Bonzini, 2013/10/03
- [Qemu-devel] [PATCH 4/4] qdev: switch reset to post-order, Paolo Bonzini, 2013/10/03
- Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset, Michael S. Tsirkin, 2013/10/03
- Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset, Paolo Bonzini, 2013/10/03
- Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset, Michael S. Tsirkin, 2013/10/03
- Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset, Paolo Bonzini, 2013/10/03
- Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset, Michael S. Tsirkin, 2013/10/06
- Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH 0/4] qdev: switch reset to post-order, clean up PCI reset, Paolo Bonzini, 2013/10/09