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Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target |
Date: |
Tue, 17 Jun 2014 15:36:31 +0800 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Fri, Jun 13, 2014 at 01:18:00PM +0200, Greg Kurz wrote:
> This version merges the changes requested during the v7 review, remarks from
> ppc64 dump support review (yes, we talked about virtio there) and the work on
> virtio subsections migration. Also two new patches have been added:
> - patch #1 is a preliminary fix for virtio-serial posted by Alexander Graf
> - patch #9 prepares the work on the virtio_is_big_endian() helper
>
> The most significant changes are:
> - introduction of a new CPU method for virtio
> - endianness is taken from CPU that resets the device
> - fastpath virtio memory accessors for fixed endian targets
> - VMState based virtio subsections (compatibility friendly)
I'm surprised it's not enough for the virtio device to have an
endianness field (big/little). It seems these patches make endianness
depend on the CPUState through which the device is being accessed.
Can you explain why it's necessary to check the CPUState?
Stefan
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- Re: [Qemu-devel] [PATCH v8 14/20] virtio-net: use virtio wrappers to access headers, (continued)
- [Qemu-devel] [PATCH v8 15/20] virtio-balloon: use virtio wrappers to access page frame numbers, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 16/20] virtio-blk: use virtio wrappers to access headers, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 17/20] virtio-scsi: use virtio wrappers to access headers, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 18/20] virtio-serial-bus: use virtio wrappers to access headers, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 19/20] virtio-9p: use virtio wrappers to access headers, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 20/20] target-ppc: enable virtio endian ambivalent support, Greg Kurz, 2014/06/13
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Alexander Graf, 2014/06/13
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target,
Stefan Hajnoczi <=
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Alexander Graf, 2014/06/17
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Stefan Hajnoczi, 2014/06/18
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Greg Kurz, 2014/06/18
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Michael S. Tsirkin, 2014/06/18
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Alexander Graf, 2014/06/18
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Michael S. Tsirkin, 2014/06/18
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Stefan Hajnoczi, 2014/06/19
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Peter Maydell, 2014/06/18
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Michael S. Tsirkin, 2014/06/18
- Re: [Qemu-devel] [PATCH v8 00/20] virtio endian-ambivalent target, Greg Kurz, 2014/06/18