1: slightly reduce Meltdown band-aid overhead 2: remove CR reads from exit-to-guest path 3: introduce altinstruction_nop assembler macro 4: NOP out most XPTI entry/exit code when it's not in use 5: avoid double CR3 reload when switching to guest user mode 6: disable XPTI when RDCL_NO 7: x86: log XPTI enabled status
I won't mind if it was decided for some of them to be pointless, but I think 1 (because of a measurable improvement of 1-3%), 4 (helping the "xpti=no" case, even if only a little; taking 3 as prereq), and 6+7 should be considered seriously. Signed-off-by: Jan Beulich <jbeul...@suse.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
