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From: lantianyu1986@gmail.com
To: pbonzini@redhat.com, rkrcmar@redhat.com, corbet@lwn.net,
	kys@microsoft.com, haiyangz@microsoft.com,
	sthemmin@microsoft.com, sashal@kernel.org, tglx@linutronix.de,
	mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org,
	michael.h.kelley@microsoft.com
Cc: Tianyu Lan <Tianyu.Lan@microsoft.com>,
	kvm@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
	vkuznets@redhat.com
Subject: [PATCH V2 0/3] KVM/Hyper-V: Add Hyper-V direct tlb flush support
Date: Wed, 14 Aug 2019 15:34:44 +0800
Message-ID: <20190814073447.96141-1-Tianyu.Lan@microsoft.com> (raw)

From: Tianyu Lan <Tianyu.Lan@microsoft.com>

This patchset is to add Hyper-V direct tlb support in KVM. Hyper-V
in L0 can delegate L1 hypervisor to handle tlb flush request from
L2 guest when direct tlb flush is enabled in L1.

Patch 2 introduces new cap KVM_CAP_HYPERV_DIRECT_TLBFLUSH to enable
feature from user space. User space should enable this feature only
when Hyper-V hypervisor capability is exposed to guest and KVM profile
is hided. There is a parameter conflict between KVM and Hyper-V hypercall.
We hope L2 guest doesn't use KVM hypercall when the feature is
enabled. Detail please see comment of new API "KVM_CAP_HYPERV_DIRECT_TLBFLUSH"

Change since v1:
       - Fix offset issue in the patch 1.
       - Update description of KVM KVM_CAP_HYPERV_DIRECT_TLBFLUSH.

Tianyu Lan (2):
  x86/Hyper-V: Fix definition of struct hv_vp_assist_page
  KVM/Hyper-V: Add new KVM cap KVM_CAP_HYPERV_DIRECT_TLBFLUSH

Vitaly Kuznetsov (1):
  KVM/Hyper-V/VMX: Add direct tlb flush support

 Documentation/virtual/kvm/api.txt  | 12 ++++++++++++
 arch/x86/include/asm/hyperv-tlfs.h | 24 +++++++++++++++++++-----
 arch/x86/include/asm/kvm_host.h    |  2 ++
 arch/x86/kvm/vmx/evmcs.h           |  2 ++
 arch/x86/kvm/vmx/vmx.c             | 38 ++++++++++++++++++++++++++++++++++++++
 arch/x86/kvm/x86.c                 |  8 ++++++++
 include/linux/kvm_host.h           |  1 +
 include/uapi/linux/kvm.h           |  1 +
 8 files changed, 83 insertions(+), 5 deletions(-)

-- 
2.14.5


             reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-14  7:34 lantianyu1986 [this message]
2019-08-14  7:34 ` [PATCH V2 1/3] x86/Hyper-V: Fix definition of struct hv_vp_assist_page lantianyu1986
2019-08-14 13:26   ` Paolo Bonzini
2019-08-14 13:28     ` Paolo Bonzini
2019-08-14  7:34 ` [PATCH V2 2/3] KVM/Hyper-V: Add new KVM cap KVM_CAP_HYPERV_DIRECT_TLBFLUSH lantianyu1986
2019-08-14  7:34 ` [PATCH V2 3/3] KVM/Hyper-V/VMX: Add direct tlb flush support lantianyu1986
2019-08-14 13:33   ` Paolo Bonzini
2019-08-15 12:24     ` Tianyu Lan

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