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Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts |
Date: |
Mon, 20 Feb 2017 12:06:35 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0 |
On 20/02/2017 10:19, Gonglei (Arei) wrote:
> Hi Paolo,
>
>>
>>
>> On 16/02/2017 02:31, Gonglei (Arei) wrote:
>>> And the below patch works for me, I can support max 255 vcpus for WS2012
>>> with hyper-v enlightenments.
>>>
>>> diff --git a/target/i386/kvm.c b/target/i386/kvm.c
>>> index 27fd050..efe3cbc 100644
>>> --- a/target/i386/kvm.c
>>> +++ b/target/i386/kvm.c
>>> @@ -772,7 +772,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
>>>
>>> c = &cpuid_data.entries[cpuid_i++];
>>> c->function = HYPERV_CPUID_IMPLEMENT_LIMITS;
>>> - c->eax = 0x40;
>>> + c->eax = -1;
>>> c->ebx = 0x40;
>>>
>>> kvm_base = KVM_CPUID_SIGNATURE_NEXT;
>>
>> This needs to depend on the machine type, but apart from that I think
>
> I don't know why. Because the negative effects for this change don't exist
> on current QEMU IIUC, and we don't have compatible problems for live
> migration.
CPUID should never change with the same machine type and command line.
Paolo
>> you should submit the patch for 2.9.
>>
>
> Thanks,
> -Gonglei
>
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, (continued)
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Yan Vugenfirer, 2017/02/09
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Gonglei (Arei), 2017/02/10
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Paolo Bonzini, 2017/02/10
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Gonglei (Arei), 2017/02/11
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Paolo Bonzini, 2017/02/11
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Vadim Rozenfeld, 2017/02/13
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Gonglei (Arei), 2017/02/15
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Vadim Rozenfeld, 2017/02/16
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Paolo Bonzini, 2017/02/17
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Gonglei (Arei), 2017/02/20
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts,
Paolo Bonzini <=
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Gonglei (Arei), 2017/02/20
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Paolo Bonzini, 2017/02/20
- Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, Gonglei (Arei), 2017/02/20