On Fri, Nov 20 2020 at 12:46, Juergen Gross wrote: > SWAPGS is used only for interrupts coming from user mode or for > returning to user mode. So there is no reason to use the PARAVIRT > framework, as it can easily be replaced by an ALTERNATIVE depending > on X86_FEATURE_XENPV. > > There are several instances using the PV-aware SWAPGS macro in paths > which are never executed in a Xen PV guest. Replace those with the > plain swapgs instruction. For SWAPGS_UNSAFE_STACK the same applies. > > Signed-off-by: Juergen Gross <jgr...@suse.com> > Acked-by: Andy Lutomirski <l...@kernel.org> > Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Reviewed-by: Thomas Gleixner <t...@linutronix.de> _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
