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Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts
From: |
Gonglei (Arei) |
Subject: |
Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts |
Date: |
Mon, 20 Feb 2017 09:19:01 +0000 |
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.
> you should submit the patch for 2.9.
>
Thanks,
-Gonglei
- [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts, hangaohuai, 2017/02/09
- 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) <=
- 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
- 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