From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org
Cc: x86@kernel.org, "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.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>, "Bandan Das" <bsd@redhat.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 0/7] Enlightened VMCS support for KVM on Hyper-V
Date: Fri, 9 Mar 2018 15:02:42 +0100 [thread overview]
Message-ID: <20180309140249.2840-1-vkuznets@redhat.com> (raw)
Changes since v2:
- Move hyperv.h out of uapi [Radim Krčmář], PATCHes 1 and 2 added.
- define KVM_EVMCS_VERSION, HV_X64_ENLIGHTENED_VMCS_VERSION [Radim Krčmář]
- WARN_ONCE in get_evmcs_offset[,_cf] [Radim Krčmář]
- add evmcs_sanitize_exec_ctrls() and use it in hardware_setup() and
dump_vmcs() [Radim Krčmář]
When running nested KVM on Hyper-V it's possible to use so called
'Enlightened VMCS' and do normal memory reads/writes instead of
doing VMWRITE/VMREAD instructions. In addition, clean field mask
provides a huge room for optimization on L0's side.
Tight CPUID loop test shows significant speedup (E5-2667 v4 @ 3.20GHz):
Before: 18890 cycles
After: 8304 cycles
Ladi Prosek (1):
x86/kvm: rename HV_X64_MSR_APIC_ASSIST_PAGE to
HV_X64_MSR_VP_ASSIST_PAGE
Vitaly Kuznetsov (6):
x86/hyper-v: move hyperv.h out of uapi
x86/hyper-v: move definitions from TLFS to hyperv-tlfs.h
x86/hyper-v: allocate and use Virtual Processor Assist Pages
x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits
x86/hyper-v: detect nested features
x86/kvm: use Enlightened VMCS when running on Hyper-V
MAINTAINERS | 2 +-
arch/x86/hyperv/hv_init.c | 35 +-
arch/x86/include/asm/hyperv-tlfs.h | 695 +++++++++++++++++++++++++++++++++++
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/include/asm/mshyperv.h | 91 +----
arch/x86/include/uapi/asm/hyperv.h | 421 ---------------------
arch/x86/include/uapi/asm/kvm_para.h | 1 -
arch/x86/kernel/cpu/mshyperv.c | 21 +-
arch/x86/kvm/hyperv.c | 8 +-
arch/x86/kvm/lapic.h | 2 +-
arch/x86/kvm/vmx.c | 625 ++++++++++++++++++++++++++++++-
arch/x86/kvm/x86.c | 2 +-
drivers/hv/connection.c | 1 -
drivers/hv/hv.c | 1 -
drivers/hv/hyperv_vmbus.h | 1 +
drivers/hv/vmbus_drv.c | 1 -
include/linux/hyperv.h | 1 -
17 files changed, 1379 insertions(+), 530 deletions(-)
create mode 100644 arch/x86/include/asm/hyperv-tlfs.h
delete mode 100644 arch/x86/include/uapi/asm/hyperv.h
--
2.14.3
next reply other threads:[~2018-03-09 14:02 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-09 14:02 Vitaly Kuznetsov [this message]
2018-03-09 14:02 ` [PATCH v3 1/7] x86/hyper-v: move hyperv.h out of uapi Vitaly Kuznetsov
2018-03-13 22:46 ` Michael Kelley (EOSG)
2018-03-14 9:35 ` Vitaly Kuznetsov
2018-03-14 16:13 ` Christoph Hellwig
2018-03-14 16:42 ` Joshua R. Poulson
2018-03-15 7:31 ` Christoph Hellwig
2018-03-09 14:02 ` [PATCH v3 2/7] x86/hyper-v: move definitions from TLFS to hyperv-tlfs.h Vitaly Kuznetsov
2018-03-13 22:51 ` Michael Kelley (EOSG)
2018-03-09 14:02 ` [PATCH v3 3/7] x86/kvm: rename HV_X64_MSR_APIC_ASSIST_PAGE to HV_X64_MSR_VP_ASSIST_PAGE Vitaly Kuznetsov
2018-03-09 14:02 ` [PATCH v3 4/7] x86/hyper-v: allocate and use Virtual Processor Assist Pages Vitaly Kuznetsov
2018-03-13 23:08 ` Michael Kelley (EOSG)
2018-03-14 15:15 ` Thomas Gleixner
2018-03-15 10:10 ` Vitaly Kuznetsov
2018-03-15 11:45 ` Thomas Gleixner
2018-03-15 13:48 ` Peter Zijlstra
2018-03-15 13:57 ` Thomas Gleixner
2018-03-09 14:02 ` [PATCH v3 5/7] x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits Vitaly Kuznetsov
2018-03-13 23:09 ` Michael Kelley (EOSG)
2018-03-09 14:02 ` [PATCH v3 6/7] x86/hyper-v: detect nested features Vitaly Kuznetsov
2018-03-13 23:11 ` Michael Kelley (EOSG)
2018-03-09 14:02 ` [PATCH v3 7/7] x86/kvm: use Enlightened VMCS when running on Hyper-V Vitaly Kuznetsov
2018-03-09 14:08 ` Thomas Gleixner
2018-03-12 14:19 ` Vitaly Kuznetsov
2018-03-13 19:12 ` Radim Krčmář
2018-03-14 17:20 ` Vitaly Kuznetsov
2018-03-14 14:54 ` Paolo Bonzini
2018-03-14 15:19 ` Thomas Gleixner
2018-03-14 17:22 ` Vitaly Kuznetsov
2018-03-14 19:59 ` Thomas Gleixner
2018-03-14 20:06 ` Peter Zijlstra
2018-03-14 14:53 ` Paolo Bonzini
2018-03-15 9:56 ` Vitaly Kuznetsov
2018-03-15 11:01 ` Paolo Bonzini
2018-03-15 15:19 ` Vitaly Kuznetsov
2018-03-15 17:02 ` Radim Krčmář
2018-03-15 17:28 ` Radim Krčmář
2018-03-15 18:04 ` Vitaly Kuznetsov
2018-03-15 19:28 ` Thomas Gleixner
2018-03-15 19:43 ` Radim Krčmář
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