[vfio-users] Far Cry Primal

[thibaut noah]

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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