On 23 November 2017 at 14:56, Eric Auger <eric.au...@redhat.com> wrote: > At the moment the ITS is not properly reset. On System reset or > reboot, previous ITS register values and caches are left > unchanged. Some of the registers might point to some guest RAM > tables which are not valid anymore. This leads to state > inconsistencies that are detected by the kernel save/restore > code. And eventually this may cause qemu abort. > > This series adds vITS reset modality: > - the 2 first patches bring a minimalist reset through individual > register writes. However, with kernel versions < 4.15, this reset > is not complete (vITS caches are not voided). > - With kernel versions >= 4.15 we can rely on a new ITS KVM device > reset IOTCL. The last 2 patches introduce the full reset. > > Patches 1-2 have all kernel dependencies resolved. > Patches 3-4' dependencies were pulled for v4.15-rc0 but as the tag is > not set, the kernel header update still is partial.
We don't need the change to be tagged for us to sync with the kernel headers: if it's in mainline that's good enough. thanks -- PMM
