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Subject[PATCH v4 0/5] KVM: x86: hyperv: PV IPI support for Windows guests
Date
Changes since v3 [Roman Kagan]:
- Don't use vcpu_id in kvm_make_vcpus_request_mask to avoid dealing with
sparse CPU masks.
- Create get_vcpu_idx_by_vpidx() and use it in get_vcpu_by_vpidx() and
kvm_hv_flush_tlb().

Using hypercall for sending IPIs is faster because this allows to specify
any number of vCPUs (even > 64 with sparse CPU set), the whole procedure
will take only one VMEXIT.

Same as PV TLB flush, this allows Windows guests having > 64 vCPUs to boot
on KVM when Hyper-V extensions are enabled.

Vitaly Kuznetsov (5):
KVM: x86: hyperv: enforce vp_index < KVM_MAX_VCPUS
KVM: x86: hyperv: optimize 'all cpus' case in kvm_hv_flush_tlb()
KVM: x86: hyperv: use get_vcpu_by_vpidx() in kvm_hv_flush_tlb()
x86/hyper-v: rename ipi_arg_{ex,non_ex} structures
KVM: x86: hyperv: implement PV IPI send hypercalls

Documentation/virtual/kvm/api.txt | 8 ++
arch/x86/hyperv/hv_apic.c | 12 +--
arch/x86/include/asm/hyperv-tlfs.h | 16 +--
arch/x86/kvm/hyperv.c | 211 +++++++++++++++++++++++++++----------
arch/x86/kvm/trace.h | 42 ++++++++
arch/x86/kvm/x86.c | 1 +
include/uapi/linux/kvm.h | 1 +
virt/kvm/kvm_main.c | 6 +-
8 files changed, 224 insertions(+), 73 deletions(-)

--
2.14.4

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