On 08/15/2018 02:09 AM, Jan Beulich wrote: > Use EFLAGS.IF for all ordinary purposes; there's in particular no need > to unduly defer NMI/#MC. Clear/set GIF solely around VMRUN itself. This > has the additional advantage that svm_stgi_label now indeed marks the > only place where GIF gets set. > > A note regarding the main STI(s) placement: Quite counterintuitively the > host's EFLAGS.IF continues to have a meaning while the guest runs; see > PM Vol 2 section "Physical (INTR) Interrupt Masking in EFLAGS". Hence we > need to set the flag for the duration of time being in guest context. > However, SPEC_CTRL_ENTRY_FROM_HVM wants to be carried out with EFLAGS.IF > clear. > > Suggested-by: Andrew Cooper <andrew.coop...@citrix.com> > Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrov...@oracle.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
