[PATCH v2 0/6] KVM: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS and re-purpose it on x86
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: 2021-11-16 16:35:04
Also in:
kvm, kvm-riscv, linux-arm-kernel, linux-mips, lkml
Changes since v1: - PATCH6 for s390 added. - On ARM64, do not make KVM_CAP_NR_VCPUS return value dependent on whether it is a system-wide ioctl or a per-VM one [Marc Zyngier]. Original description: This is a continuation of "KVM: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS" (https://lore.kernel.org/kvm/20211111134733.86601-1-vkuznets@redhat.com/ (local)) 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) Vitaly Kuznetsov (6): KVM: arm64: Cap KVM_CAP_NR_VCPUS by kvm_arm_default_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: s390: Cap KVM_CAP_NR_VCPUS by num_online_cpus() KVM: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS arch/arm64/kvm/arm.c | 9 ++++++++- arch/mips/kvm/mips.c | 2 +- arch/powerpc/kvm/powerpc.c | 4 ++-- arch/riscv/kvm/vm.c | 2 +- arch/s390/kvm/kvm-s390.c | 2 ++ arch/x86/include/asm/kvm_host.h | 1 - arch/x86/kvm/x86.c | 2 +- 7 files changed, 15 insertions(+), 7 deletions(-) -- 2.33.1