Re: [Xen-devel] [PATCH v4 4/8] x86/XPTI: use %r12 to write zero into xen_cr3

On Mon, Mar 19, 2018 at 07:39:34AM -0600, Jan Beulich wrote: > Now that we zero all registers early on all entry paths, use that to > avoid a couple of immediates here. > > Signed-off-by: Jan Beulich > Acked-by: Andrew Cooper Reviewed-by: Wei Liu

Re: [Xen-devel] [PATCH v4 4/8] x86/XPTI: use %r12 to write zero into xen_cr3

On 19/03/18 14:39, Jan Beulich wrote: > Now that we zero all registers early on all entry paths, use that to > avoid a couple of immediates here. > > Signed-off-by: Jan Beulich > Acked-by: Andrew Cooper Tested-by: Juergen Gross

[Xen-devel] [PATCH v4 4/8] x86/XPTI: use %r12 to write zero into xen_cr3

Now that we zero all registers early on all entry paths, use that to avoid a couple of immediates here. Signed-off-by: Jan Beulich Acked-by: Andrew Cooper --- v4: Add comments about the %r12 being zero --- We may want to consider eliminating a few