On Wed, Nov 20, 2013 at 09:27:22AM +0000, Peter Maydell wrote: > On 20 November 2013 09:22, Stefan Hajnoczi <stefa...@gmail.com> wrote: > > On Tue, Oct 22, 2013 at 09:35:52AM -0700, Roy Franz wrote: > >> This patchset fixes buffered flash writes on the VExpress > >> platform. Buffered writes should now work properly on platforms whose > >> flash interface width is different from the device width. The default > >> is for the device-width to be set to the interface width, so platforms > >> that can benefit from this change will need to be updated. This patchset > >> updates the configuration for the VExpress platform which requires it. > >> UEFI firmware uses buffered writes for persistent variable storage, > >> and this patchset enables this usage on QEMU. > > > Looks okay on quick review. > > > > I want to confirm: live migration is not supported? > > I don't know if you meant anything special by putting "live" > in there, but migration and save/restore is absolutely supposed > to be supported on the vexpress platform and the pflash > devices (they're in the x86 PC model too...)
I looked at the patches again and there is no problem. Originally I thought the device_width field would need to be migrated but it's purely configuration state - the destination QEMU will receive it on the command-line. Therefore we don't need to transfer it during live migration. Stefan
