Re: [Xen-devel] [PATCH] x86: hide MWAITX from PV domains

2015-10-13 Thread Jan Beulich
>>> On 13.10.15 at 15:15, wrote: > On 13/10/15 13:25, Jan Beulich wrote: >> Since MWAIT is hidden too. (Linux starting with 4.3 is making use of >> that feature, and is checking for it without looking at the MWAIT one.) > > This is surely a Linux bug which wants fixing as well? I don't think tha

Re: [Xen-devel] [PATCH] x86: hide MWAITX from PV domains

2015-10-13 Thread Andrew Cooper
On 13/10/15 13:25, Jan Beulich wrote: > Since MWAIT is hidden too. (Linux starting with 4.3 is making use of > that feature, and is checking for it without looking at the MWAIT one.) This is surely a Linux bug which wants fixing as well? > > Signed-off-by: Jan Beulich Reviewed-by: Andrew Cooper

[Xen-devel] [PATCH] x86: hide MWAITX from PV domains

2015-10-13 Thread Jan Beulich
Since MWAIT is hidden too. (Linux starting with 4.3 is making use of that feature, and is checking for it without looking at the MWAIT one.) Signed-off-by: Jan Beulich --- a/xen/arch/x86/traps.c +++ b/xen/arch/x86/traps.c @@ -964,6 +964,7 @@ void pv_cpuid(struct cpu_user_regs *regs __cl