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 <jgross@xxxxxxxx> > Acked-by: Andy Lutomirski <luto@xxxxxxxxxx> > Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
