Re: [PATCH v2] mce: use safe MSR accesses

2015-03-13 Thread Borislav Petkov
On Fri, Mar 13, 2015 at 11:03:39AM -0500, jesse.lar...@amd.com wrote: > From: Jesse Larrew > > Certain MSRs are only relevant to a kernel in host mode, and kvm had > chosen not to implement these MSRs at all for guests. If a guest kernel > ever tried to access these MSRs, the result was a general

Re: [PATCH v2] mce: use safe MSR accesses

2015-03-13 Thread Joel Schopp
On 03/13/2015 11:03 AM, jesse.lar...@amd.com wrote: > From: Jesse Larrew > > Certain MSRs are only relevant to a kernel in host mode, and kvm had > chosen not to implement these MSRs at all for guests. If a guest kernel > ever tried to access these MSRs, the result was a general protection > faul

RE: [PATCH v2] mce: use safe MSR accesses

2015-03-13 Thread Luck, Tony
-rdmsrl(msrs[i], val); - -/* CntP bit set? */ -if (val & BIT_64(62)) { - val &= ~BIT_64(62); - wrmsrl(msrs[i], val); -