On Mon, Jan 28, 2019 at 01:36:39AM -0500, Mark Mielke wrote: > This commit was first released with 4.20: > > commit 22a7cdcae6a4a3c8974899e62851d270956f58ce > Author: KarimAllah Ahmed <karahmed@xxxxxxxxx> > Date: Sat Oct 20 23:42:59 2018 +0200 > > KVM/nVMX: Do not validate that posted_intr_desc_addr is page aligned > > The spec only requires the posted interrupt descriptor address to be > 64-bytes aligned (i.e. bits[0:5] == 0). Using page_address_valid also > forces the address to be page aligned. > > Only validate that the address does not cross the maximum physical address > without enforcing a page alignment. > > This commit applies clean to 4.19. > > Without this commit, nested virtualization is broken in 4.19 for some > use cases. In my case, a simple virt-install within the L1 guest > failed to start with "KVM: entry failed, hardware error 0x7". I found > another user with the same symptoms here: > > https://bugzilla.redhat.com/show_bug.cgi?id=1657296 > > After applying the above patch to 4.19.18, virt-install within the L1 > guest proceeded as expected. Now queued up, thanks. greg k-h
