Re: [Xen-devel] [PATCH] x86/Intel: virtualize support for cpuid faulting

2016-10-12 Thread Jan Beulich
>>> On 12.10.16 at 06:07, wrote: > --- In addition to what Andrew said: Please version your patch, and please add a short summary of what changed compared to the previous version here. > @@ -2931,6 +2941,11 @@ static int vmx_msr_write_intercept(unsigned int msr, > uint64_t

Re: [Xen-devel] [PATCH] x86/Intel: virtualize support for cpuid faulting

2016-10-12 Thread Andrew Cooper
On 12/10/16 05:07, Kyle Huey wrote: > rr (http://rr-project.org/), a Linux userspace record-and-replay reverse- > execution debugger, would like to trap and emulate the CPUID instruction. > This would allow us to a) mask away certain hardware features that rr does > not support (e.g. RDRAND) and

[Xen-devel] [PATCH] x86/Intel: virtualize support for cpuid faulting

2016-10-11 Thread Kyle Huey
rr (http://rr-project.org/), a Linux userspace record-and-replay reverse- execution debugger, would like to trap and emulate the CPUID instruction. This would allow us to a) mask away certain hardware features that rr does not support (e.g. RDRAND) and b) enable trace portability across machines