From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Roman Kagan" <rkagan@virtuozzo.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Stephen Hemminger" <sthemmin@microsoft.com>,
"Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>,
"Mohammed Gamal" <mmorsy@redhat.com>,
"Cathy Avery" <cavery@redhat.com>,
"Wanpeng Li" <wanpeng.li@hotmail.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v6 0/7] KVM: x86: hyperv: PV IPI support for Windows guests
Date: Wed, 26 Sep 2018 19:02:52 +0200 [thread overview]
Message-ID: <20180926170259.29796-1-vkuznets@redhat.com> (raw)
Changes since v5:
- New 'hybrid' approach to VP indexes: introduce 'num_mismatched_vp_indexes'
and use it for optimization in both PV IPI and TLB flush [Paolo Bonzini,
Roman Kagan].
- Rebase, KVM_CAP_HYPERV_SEND_IPI is now '160'.
- Patches 3-5 are new in this version.
- Drop "x86/hyper-v: rename ipi_arg_{ex,non_ex} structures" patch as it is
already merged in kvm/queue.
Original description:
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 (7):
KVM: x86: hyperv: enforce vp_index < KVM_MAX_VCPUS
KVM: x86: hyperv: optimize 'all cpus' case in kvm_hv_flush_tlb()
KVM: x86: hyperv: consistently use 'hv_vcpu' for 'struct kvm_vcpu_hv'
variables
KVM: x86: hyperv: keep track of mismatched VP indexes
KVM: x86: hyperv: valid_bank_mask should be 'u64'
KVM: x86: hyperv: optimize kvm_hv_flush_tlb() for vp_index == vcpu_idx
case
KVM: x86: hyperv: implement PV IPI send hypercalls
Documentation/virtual/kvm/api.txt | 7 +
arch/x86/include/asm/kvm_host.h | 3 +
arch/x86/kvm/hyperv.c | 268 +++++++++++++++++++++++-------
arch/x86/kvm/trace.h | 42 +++++
arch/x86/kvm/x86.c | 1 +
include/uapi/linux/kvm.h | 1 +
virt/kvm/kvm_main.c | 6 +-
7 files changed, 265 insertions(+), 63 deletions(-)
--
2.17.1
next reply other threads:[~2018-09-26 17:03 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-26 17:02 Vitaly Kuznetsov [this message]
2018-09-26 17:02 ` [PATCH v6 1/7] KVM: x86: hyperv: enforce vp_index < KVM_MAX_VCPUS Vitaly Kuznetsov
2018-09-26 17:02 ` [PATCH v6 2/7] KVM: x86: hyperv: optimize 'all cpus' case in kvm_hv_flush_tlb() Vitaly Kuznetsov
2018-09-26 17:02 ` [PATCH v6 3/7] KVM: x86: hyperv: consistently use 'hv_vcpu' for 'struct kvm_vcpu_hv' variables Vitaly Kuznetsov
2018-09-27 7:49 ` Roman Kagan
2018-09-26 17:02 ` [PATCH v6 4/7] KVM: x86: hyperv: keep track of mismatched VP indexes Vitaly Kuznetsov
2018-09-27 7:59 ` Roman Kagan
2018-09-27 9:17 ` Vitaly Kuznetsov
2018-10-01 15:48 ` Paolo Bonzini
2018-10-01 15:54 ` Roman Kagan
2018-10-01 15:57 ` Roman Kagan
2018-09-26 17:02 ` [PATCH v6 5/7] KVM: x86: hyperv: valid_bank_mask should be 'u64' Vitaly Kuznetsov
2018-09-27 8:01 ` Roman Kagan
2018-09-26 17:02 ` [PATCH v6 6/7] KVM: x86: hyperv: optimize kvm_hv_flush_tlb() for vp_index == vcpu_idx case Vitaly Kuznetsov
2018-09-27 9:42 ` Roman Kagan
2018-09-26 17:02 ` [PATCH v6 7/7] KVM: x86: hyperv: implement PV IPI send hypercalls Vitaly Kuznetsov
2018-09-27 11:07 ` Roman Kagan
2018-10-01 16:01 ` Paolo Bonzini
2018-10-01 16:20 ` Vitaly Kuznetsov
2018-10-01 16:21 ` Paolo Bonzini
2018-10-01 16:41 ` Vitaly Kuznetsov
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