[vfio-users] Far Cry Primal

Tue Jun 14 16:23:29 UTC 2016

Thanks, I guess the "issue" is only from the blizzard games. It could very
well be that this is used as some anti-tamper tool in these blizzard games,
but I find it odd that it only does this in Win10 and that returning 0
doesn't cause a problem.

On Tue, Jun 14, 2016 at 12:06 PM Jayme Howard <g.prime at gmail.com> wrote:

> I've only seen it call them at startup.  After playing for an hour or so,
> I didn't see more of them in my dmesg output.
>
> On Tue, Jun 14, 2016 at 9:38 AM, Abdulla Bubshait <darkstego at gmail.com>
> wrote:
>
>> For what its worth it seems Rise of the Tomb Raider also calls it, so it
>> might be Denuvo.
>>
>> The interesting thing is Rise of the Tomb Raider only calls it once. So
>> there is no performance issue. Heroes and Starcraft continuously make these
>> calls which causes the performance issue.
>>
>> Can anyone confirm if Doom only calls up the MSRS in one spot or does it
>> constantly keep calling the MSRS throughout the game?
>>
>> On Tue, Jun 14, 2016 at 8:55 AM thibaut noah <thibaut.noah at gmail.com>
>> wrote:
>>
>>> They have the warden which is constantly checking your system
>>>
>>> 2016-06-14 14:36 GMT+02:00 Jayme Howard <g.prime at gmail.com>:
>>>
>>>> I don't think Blizzard uses Denuvo.
>>>>
>>>> On Tue, Jun 14, 2016 at 7:29 AM, thibaut noah <thibaut.noah at gmail.com>
>>>> wrote:
>>>>
>>>>> That might also have to do with denuvo protection
>>>>>
>>>>> 2016-06-14 9:49 GMT+02:00 Abdulla Bubshait <darkstego at gmail.com>:
>>>>>
>>>>>> Yes, this is a win10 issue.
>>>>>> Changing the Virtual CPU model does not make a difference. Each model
>>>>>> has its own LBR register address, but one will be called.
>>>>>>
>>>>>> The only thing I have not tried is using an AMD processor. AMD CPUs
>>>>>> support lbrv which is virtualization of the LBR registers, so it is handled
>>>>>> in hardware rather than software.
>>>>>> If anyone has an AMD CPU and a win10 VM willing to confirm if their
>>>>>> setup does indeed work in these games, that would be great.
>>>>>>
>>>>>> On Tue, Jun 14, 2016 at 3:39 AM Ivan Volosyuk <
>>>>>> ivan.volosyuk at gmail.com> wrote:
>>>>>>
>>>>>>> 2 things:
>>>>>>>  - this msrs are not called from StarCraft on Win8.1.
>>>>>>>  - i wonder if forcing virtual CPU model to something older will
>>>>>>> disable them in Win10.
>>>>>>>
>>>>>>> This msrs issue is what holds me off upgrade to W10.
>>>>>>>
>>>>>>> On Tue, Jun 14, 2016 at 12:39 PM Jayme Howard <g.prime at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> For what it's worth, I believe I was getting them on Overwatch as
>>>>>>>> well.  It's not happening with EVERY game I have though.
>>>>>>>>
>>>>>>>> On Mon, Jun 13, 2016 at 8:28 PM, Abdulla Bubshait <
>>>>>>>> darkstego at gmail.com> wrote:
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Mon, Jun 13, 2016 at 6:27 PM, Jayme Howard <g.prime at gmail.com>
>>>>>>>>> wrote:
>>>>>>>>> > That's the output for Doom.
>>>>>>>>> >
>>>>>>>>> > [1639445.044855] kvm [9487]: vcpu2 kvm_set_msr_common:
>>>>>>>>> MSR_IA32_DEBUGCTLMSR
>>>>>>>>> > 0x1, nop
>>>>>>>>> > [1639445.044861] kvm [9487]: vcpu2 ignored rdmsr: 0x1c9
>>>>>>>>> > [1639445.044862] kvm [9487]: vcpu2 ignored rdmsr: 0x680
>>>>>>>>> > [1639445.044863] kvm [9487]: vcpu2 ignored rdmsr: 0x6c0
>>>>>>>>> > [1639445.044890] kvm [9487]: vcpu1 kvm_set_msr_common:
>>>>>>>>> MSR_IA32_DEBUGCTLMSR
>>>>>>>>> > 0x1, nop
>>>>>>>>> > [1639445.044895] kvm [9487]: vcpu1 ignored rdmsr: 0x1c9
>>>>>>>>> > [1639445.044896] kvm [9487]: vcpu1 ignored rdmsr: 0x680
>>>>>>>>> > [1639445.044897] kvm [9487]: vcpu1 ignored rdmsr: 0x6c0
>>>>>>>>> > [1639445.044905] kvm [9487]: vcpu1 kvm_set_msr_common:
>>>>>>>>> MSR_IA32_DEBUGCTLMSR
>>>>>>>>> > 0x1, nop
>>>>>>>>> > [1639445.044907] kvm [9487]: vcpu1 ignored rdmsr: 0x1c9
>>>>>>>>> > [1639445.044908] kvm [9487]: vcpu1 ignored rdmsr: 0x680
>>>>>>>>> > [1639445.044909] kvm [9487]: vcpu1 ignored rdmsr: 0x6c0
>>>>>>>>> > [1639445.046195] kvm [9487]: vcpu2 kvm_set_msr_common:
>>>>>>>>> MSR_IA32_DEBUGCTLMSR
>>>>>>>>> > 0x1, nop
>>>>>>>>> > [1639445.046198] kvm [9487]: vcpu2 ignored rdmsr: 0x1c9
>>>>>>>>> > [1639445.046204] kvm [9487]: vcpu2 kvm_set_msr_common:
>>>>>>>>> MSR_IA32_DEBUGCTLMSR
>>>>>>>>> > 0x1, nop
>>>>>>>>> > [1639445.155114] kvm [9487]: vcpu0 kvm_set_msr_common:
>>>>>>>>> MSR_IA32_DEBUGCTLMSR
>>>>>>>>> > 0x1, nop
>>>>>>>>> > [1639445.155123] kvm [9487]: vcpu0 kvm_set_msr_common:
>>>>>>>>> MSR_IA32_DEBUGCTLMSR
>>>>>>>>> > 0x1, nop
>>>>>>>>> >
>>>>>>>>>
>>>>>>>>> Odd, this is another game that is contantly reading the LBR. I
>>>>>>>>> initially thought this was part of the StarCraft 2 and Heroes of the Storm
>>>>>>>>> code. But now I think this might be part of Windows 10. Something being
>>>>>>>>> called by these games is causing a ton of LBR reads. Maybe DX 12?
>>>>>>>>>
>>>>>>>>> I think if we can find what is causing these reads in the games we
>>>>>>>>> might be able to solve it. Because if this is the case we might be getting
>>>>>>>>> more and more games with performance problems because of these LBR checks.
>>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
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>>>>>>>>
>>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>
>>>>
>>>
>
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