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Re: [Qemu-devel] Using PCI config space to indicate config location
From: |
Rusty Russell |
Subject: |
Re: [Qemu-devel] Using PCI config space to indicate config location |
Date: |
Wed, 10 Oct 2012 14:14:47 +1030 |
User-agent: |
Notmuch/0.13.2 (http://notmuchmail.org) Emacs/23.3.1 (i686-pc-linux-gnu) |
Jamie Lokier <address@hidden> writes:
> Rusty Russell wrote:
>> I don't think it'll be that bad; reset clears the device to unknown,
>> bar0 moves it from unknown->legacy mode, bar1/2/3 changes it from
>> unknown->modern mode, and anything else is bad (I prefer being strict so
>> we catch bad implementations from the beginning).
>
> Will that work, if the guest with kernel that uses modern mode, kexecs
> to an older (but presumed reliable) kernel that only knows about legacy mode?
>
> I.e. will the replacement kernel, or (ideally) replacement driver on
> the rare occasion that is needed on a running kernel, be able to reset
> the device hard enough?
Well, you need to reset the device, so yes.
Cheers,
Rusty.
- Re: [Qemu-devel] Using PCI config space to indicate config location, (continued)
- Re: [Qemu-devel] Using PCI config space to indicate config location, Anthony Liguori, 2012/10/08
- Re: [Qemu-devel] Using PCI config space to indicate config location, Rusty Russell, 2012/10/08
- Re: [Qemu-devel] Using PCI config space to indicate config location, Anthony Liguori, 2012/10/08
- Re: [Qemu-devel] Using PCI config space to indicate config location, Rusty Russell, 2012/10/08
- Re: [Qemu-devel] Using PCI config space to indicate config location, Avi Kivity, 2012/10/09
- Re: [Qemu-devel] Using PCI config space to indicate config location, Anthony Liguori, 2012/10/09
- Re: [Qemu-devel] Using PCI config space to indicate config location, Anthony Liguori, 2012/10/09
- Re: [Qemu-devel] Using PCI config space to indicate config location, Rusty Russell, 2012/10/10
- Re: [Qemu-devel] Using PCI config space to indicate config location, Michael S. Tsirkin, 2012/10/10
- Re: [Qemu-devel] Using PCI config space to indicate config location, Jamie Lokier, 2012/10/09
- Re: [Qemu-devel] Using PCI config space to indicate config location,
Rusty Russell <=
- Re: [Qemu-devel] Using PCI config space to indicate config location, Rusty Russell, 2012/10/10
- Re: [Qemu-devel] Using PCI config space to indicate config location, Gerd Hoffmann, 2012/10/09
- Re: [Qemu-devel] Using PCI config space to indicate config location, Anthony Liguori, 2012/10/09
- Re: [Qemu-devel] Using PCI config space to indicate config location, Gerd Hoffmann, 2012/10/09
- Re: [Qemu-devel] Using PCI config space to indicate config location, Rusty Russell, 2012/10/10
- Re: [Qemu-devel] Using PCI config space to indicate config location, Anthony Liguori, 2012/10/10
- Re: [Qemu-devel] Using PCI config space to indicate config location, Michael S. Tsirkin, 2012/10/10
- Re: [Qemu-devel] Using PCI config space to indicate config location, Rusty Russell, 2012/10/10
- Re: [Qemu-devel] Using PCI config space to indicate config location, Michael S. Tsirkin, 2012/10/10
Re: [Qemu-devel] Using PCI config space to indicate config location, Michael S. Tsirkin, 2012/10/10