On 06/09/2019 15:01, Jan Beulich wrote: > Although APIC initialization will typically clear out the LDR before > setting it, the APIC cleanup code should reset the LDR. > > This was discovered with a 32-bit KVM guest jumping into a kdump > kernel. The stale bits in the LDR triggered a bug in the KVM APIC > implementation which caused the destination mapping for VCPUs to be > corrupted. > > Note that this isn't intended to paper over the KVM APIC bug. The kernel > has to clear the LDR when resetting the APIC registers except when X2APIC > is enabled. > > Signed-off-by: Bandan Das <b...@redhat.com> > [Linux commit 558682b5291937a70748d36fd9ba757fb25b99ae] > Signed-off-by: Jan Beulich <jbeul...@suse.com>
Acked-by: Andrew Cooper <andrew.coop...@citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
