Re: [Xen-devel] [PATCH for-4.11] x86/msr: Correct the emulation behaviour of MSR_PRED_CMD

2018-04-16 Thread Juergen Gross
On 16/04/18 12:56, Andrew Cooper wrote: > The behaviour of reserved bits in MSR_PRED_CMD changed between beta and > production microcode, and now raises a #GP fault for set reserved bits. The > AMD spec for future hardware also specifies this behaviour. > > Signed-off-by: Andrew Cooper Release-a

Re: [Xen-devel] [PATCH for-4.11] x86/msr: Correct the emulation behaviour of MSR_PRED_CMD

2018-04-16 Thread Jan Beulich
>>> On 16.04.18 at 13:19, wrote: > On 16/04/18 12:12, Jan Beulich wrote: > On 16.04.18 at 12:56, wrote: >>> The behaviour of reserved bits in MSR_PRED_CMD changed between beta and >>> production microcode, and now raises a #GP fault for set reserved bits. >> Interesting - quite unfortunate a

Re: [Xen-devel] [PATCH for-4.11] x86/msr: Correct the emulation behaviour of MSR_PRED_CMD

2018-04-16 Thread Andrew Cooper
On 16/04/18 12:12, Jan Beulich wrote: On 16.04.18 at 12:56, wrote: >> The behaviour of reserved bits in MSR_PRED_CMD changed between beta and >> production microcode, and now raises a #GP fault for set reserved bits. > Interesting - quite unfortunate a change. Plus - I can't find where this i

Re: [Xen-devel] [PATCH for-4.11] x86/msr: Correct the emulation behaviour of MSR_PRED_CMD

2018-04-16 Thread Jan Beulich
>>> On 16.04.18 at 12:56, wrote: > The behaviour of reserved bits in MSR_PRED_CMD changed between beta and > production microcode, and now raises a #GP fault for set reserved bits. Interesting - quite unfortunate a change. Plus - I can't find where this is being said. > The AMD spec for future