Re: [PATCH 0/5] KVM: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS and re-purpose it on x86

[Christian Borntraeger]

Am 11.11.21 um 17:32 schrieb Paolo Bonzini:
> On 11/11/21 17:27, Vitaly Kuznetsov wrote:
> > This is a comtinuation of "KVM: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS"
> > (https://lore.kernel.org/kvm/20211111134733.86601-1-vkuznets@xxxxxxxxxx/)
> > work.
> >
> > 1) Enforce KVM_CAP_NR_VCPUS <= KVM_CAP_MAX_VCPUS rule on all
> >   architectures. [Sean Christopherson]
> > 2) Make KVM_CAP_NR_VCPUS return num_online_cpus() and not an arbitrary
> >   value of '710' on x86.
> >
> > Everything but x86 was only 'eyeball tested', the change is trivial
> > but sorry in advance if I screwed up)
>
> Christian, can you look at this for s390?  Returning a fixed value seems wrong for KVM_CAP_NR_VCPUS.

will do. (Sorry I was OOO the last days).
> Thanks,
>
> Paolo
>
> > Vitaly Kuznetsov (5):
> >    KVM: arm64: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
> >    KVM: MIPS: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
> >    KVM: PPC: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
> >    KVM: RISC-V: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
> >    KVM: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS
> >
> >   arch/arm64/kvm/arm.c            | 7 ++++++-
> >   arch/mips/kvm/mips.c            | 2 +-
> >   arch/powerpc/kvm/powerpc.c      | 4 ++--
> >   arch/riscv/kvm/vm.c             | 2 +-
> >   arch/x86/include/asm/kvm_host.h | 1 -
> >   arch/x86/kvm/x86.c              | 2 +-
> >   6 files changed, 11 insertions(+), 7 deletions(-)