Re: [Xen-devel] [PATCH v4 4/7] xen/x86: use invpcid for flushing the TLB

On 29/03/18 15:44, Jan Beulich wrote: On 27.03.18 at 11:07, wrote: >> --- a/xen/arch/x86/setup.c >> +++ b/xen/arch/x86/setup.c >> @@ -63,6 +63,10 @@ boolean_param("nosmp", opt_nosmp); >> static unsigned int __initdata max_cpus; >> integer_param("maxcpus", max_cpus); >>

Re: [Xen-devel] [PATCH v4 4/7] xen/x86: use invpcid for flushing the TLB

>>> On 27.03.18 at 11:07, wrote: > --- a/xen/arch/x86/setup.c > +++ b/xen/arch/x86/setup.c > @@ -63,6 +63,10 @@ boolean_param("nosmp", opt_nosmp); > static unsigned int __initdata max_cpus; > integer_param("maxcpus", max_cpus); > > +/* opt_invpcid: If false, don't use INVPCID

Re: [Xen-devel] [PATCH v4 4/7] xen/x86: use invpcid for flushing the TLB

>>> On 27.03.18 at 11:07, wrote: > If possible use the INVPCID instruction for flushing the TLB instead of > toggling cr4.pge for that purpose. > > While at it remove the dependency on cr4.pge being required for mtrr > loading, as this will be required later anyway. > > Add a

[Xen-devel] [PATCH v4 4/7] xen/x86: use invpcid for flushing the TLB

If possible use the INVPCID instruction for flushing the TLB instead of toggling cr4.pge for that purpose. While at it remove the dependency on cr4.pge being required for mtrr loading, as this will be required later anyway. Add a command line option "invpcid" for controlling the use of INVPCID