On Sat, Aug 23, 2014 at 12:19:05PM +0200, Laszlo Ersek wrote: > Libvirt is growing support for x86_64 OVMF guests: > > http://www.redhat.com/archives/libvir-list/2014-August/msg01045.html > > An important feature of such guests is the persistent store for > non-volatile UEFI variables. This is implemented with if=pflash drives. > The referenced libvirt patchset sets up the varstore files for > single-host use. > > Wrt. migration, two choices have been considered: > (a) full-blown live storage migration for the drives backing pflash > devices, > (b) vs. a shortcut that exploits the special nature of pflash drives > (namely, their minuscule size, and a RAMBlock that keeps the full > contents of each pflash drive visible to the guest, and is > up-to-date, at all times.) > > Patch 1/2 is a trivial cleanup (some DPRINTF() calls in pflash_cfi01 > have bit-rotted). Patch 2/2 seeks to implement choice (b), which is what > the libvirt patchset relies on for migration. > > Thanks, > Laszlo > > Laszlo Ersek (2): > pflash_cfi01: fixup stale DPRINTF() calls > pflash_cfi01: write flash contents to bdrv on incoming migration > > hw/block/pflash_cfi01.c | 18 ++++++++++++++++-- > 1 file changed, 16 insertions(+), 2 deletions(-)
Thanks, applied to my block tree: https://github.com/stefanha/qemu/commits/block Stefan
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