On 16/10/17 16:58, Jan Beulich wrote: >>>> On 16.10.17 at 16:38, <andrew.coop...@citrix.com> wrote: >> c/s cf6d39f8199 "x86/PV: properly populate descriptor tables" changed the GDT >> to reference zero_page for intermediate frames between the guest and Xen >> frames. >> >> Because dom0_construct_pv() doesn't call arch_set_info_guest(), some bits of >> initialisation are missed, including the pv_destroy_gdt() which initially >> fills the references to zero_page. >> >> In practice, this means there is a window between starting and the first call >> to HYPERCALL_set_gdt() were lar/lsl/verr/verw suffer non-architectural >> behaviour. >> >> Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> > Reviewed-by: Jan Beulich <jbeul...@suse.com> > >> This probably wants backporting to Xen 4.7 and later. > Could you remind me once the patch has gone in (as that'll be only > in quite a few weeks)?
I will stick this in my x86-next branch, and leave myself a note. (I guess we will see how well this scheme works.) ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
