[PATCH v2 0/5] KVM: x86: hyperv: PV IPI support for Windows guests

Vitaly Kuznetsov
2018-06-28T13:53:08Z

Changes since v1 [Radim Krčmář]:
- Implement VP_IDX -> VCPU_IDX mapping, use it for both PV IPIs and
TLB flush (PATCHes 1-3 added)
- Minor tweaks.

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: optimize 'all cpus' case in kvm_hv_flush_tlb()
KVM: x86: hyperv: introduce vp_index_to_vcpu_idx mapping
KVM: x86: hyperv: use vp_idx_to_vcpu_idx() 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/include/asm/kvm_host.h | 12 ++
arch/x86/kvm/hyperv.c | 375 ++++++++++++++++++++++++++++++-------
arch/x86/kvm/trace.h | 42 +++++
arch/x86/kvm/x86.c | 1 +
include/uapi/linux/kvm.h | 1 +
virt/kvm/kvm_main.c | 6 +-
9 files changed, 391 insertions(+), 82 deletions(-)

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2.14.4