Re: [Xen-devel] [PATCH] x86emul: support clzero

2016-01-13 Thread Andrew Cooper
On 11/01/16 15:55, Aravind Gopalakrishnan wrote: > On 9/22/2015 8:06 AM, Jan Beulich wrote: >> ... in anticipation of this possibly going to get used by guests for >> basic thinks like memset() or clearing or pages. >> >> Since the emulation doesn't use clzero itself, checking the guest's >> CPUID

Re: [Xen-devel] [PATCH] x86emul: support clzero

2016-01-11 Thread Aravind Gopalakrishnan
On 9/22/2015 8:06 AM, Jan Beulich wrote: ... in anticipation of this possibly going to get used by guests for basic thinks like memset() or clearing or pages. Since the emulation doesn't use clzero itself, checking the guest's CPUID for the feature to be exposed is (intentionally) being avoided

Re: [Xen-devel] [PATCH] x86emul: support clzero

2015-10-08 Thread Jan Beulich
>>> On 24.09.15 at 10:02, wrote: On 23.09.15 at 19:37, wrote: >> On 22/09/15 14:06, Jan Beulich wrote: >>> ... in anticipation of this possibly going to get used by guests for >>> basic thinks like memset() or clearing or pages. >>> >>> Since the emulation doesn't use clzero itself, checking

Re: [Xen-devel] [PATCH] x86emul: support clzero

2015-09-24 Thread Jan Beulich
>>> On 24.09.15 at 13:59, wrote: > On 24/09/15 09:02, Jan Beulich wrote: > On 23.09.15 at 19:37, wrote: >>> On 22/09/15 14:06, Jan Beulich wrote: ... in anticipation of this possibly going to get used by guests for basic thinks like memset() or clearing or pages. Since the

Re: [Xen-devel] [PATCH] x86emul: support clzero

2015-09-24 Thread Andrew Cooper
On 24/09/15 09:02, Jan Beulich wrote: On 23.09.15 at 19:37, wrote: >> On 22/09/15 14:06, Jan Beulich wrote: >>> ... in anticipation of this possibly going to get used by guests for >>> basic thinks like memset() or clearing or pages. >>> >>> Since the emulation doesn't use clzero itself, chec

Re: [Xen-devel] [PATCH] x86emul: support clzero

2015-09-24 Thread Jan Beulich
>>> On 23.09.15 at 19:37, wrote: > On 22/09/15 14:06, Jan Beulich wrote: >> ... in anticipation of this possibly going to get used by guests for >> basic thinks like memset() or clearing or pages. >> >> Since the emulation doesn't use clzero itself, checking the guest's >> CPUID for the feature to

Re: [Xen-devel] [PATCH] x86emul: support clzero

2015-09-23 Thread Andrew Cooper
On 22/09/15 14:06, Jan Beulich wrote: > ... in anticipation of this possibly going to get used by guests for > basic thinks like memset() or clearing or pages. > > Since the emulation doesn't use clzero itself, checking the guest's > CPUID for the feature to be exposed is (intentionally) being avoi