RE: [PATCH 1/2] x86/hyperv: Allow guests to enable InvariantTSC

2019-10-08 Thread Vitaly Kuznetsov
Michael Kelley writes: > From: Vitaly Kuznetsov Sent: Friday, October 4, 2019 > 9:57 AM >> >> Andrea Parri writes: >> >> > If the hardware supports TSC scaling, Hyper-V will set bit 15 of the >> > HV_PARTITION_PRIVILEGE_MASK in guest VMs with a compatible Hyper-V >> > configuration version.

RE: [PATCH 1/2] x86/hyperv: Allow guests to enable InvariantTSC

2019-10-04 Thread Michael Kelley
From: Vitaly Kuznetsov Sent: Friday, October 4, 2019 9:57 AM > > Andrea Parri writes: > > > If the hardware supports TSC scaling, Hyper-V will set bit 15 of the > > HV_PARTITION_PRIVILEGE_MASK in guest VMs with a compatible Hyper-V > > configuration version. Bit 15 corresponds to the > > Acce

Re: [PATCH 1/2] x86/hyperv: Allow guests to enable InvariantTSC

2019-10-04 Thread Vitaly Kuznetsov
Andrea Parri writes: > If the hardware supports TSC scaling, Hyper-V will set bit 15 of the > HV_PARTITION_PRIVILEGE_MASK in guest VMs with a compatible Hyper-V > configuration version. Bit 15 corresponds to the > AccessTscInvariantControls privilege. If this privilege bit is set, > guests can

RE: [PATCH 1/2] x86/hyperv: Allow guests to enable InvariantTSC

2019-10-03 Thread Michael Kelley
From: Andrea Parri Sent: Thursday, October 3, 2019 8:52 AM > > If the hardware supports TSC scaling, Hyper-V will set bit 15 of the > HV_PARTITION_PRIVILEGE_MASK in guest VMs with a compatible Hyper-V > configuration version. Bit 15 corresponds to the > AccessTscInvariantControls privilege. If

Re: [PATCH 1/2] x86/hyperv: Allow guests to enable InvariantTSC

2019-10-03 Thread Andrea Parri
On Thu, Oct 03, 2019 at 05:52:00PM +0200, Andrea Parri wrote: > If the hardware supports TSC scaling, Hyper-V will set bit 15 of the > HV_PARTITION_PRIVILEGE_MASK in guest VMs with a compatible Hyper-V > configuration version. Bit 15 corresponds to the > AccessTscInvariantControls privilege. If