From: Zhu Lingshan <lingshan.zhu@intel.com>
To: mst@redhat.com, alex.williamson@redhat.com, pbonzini@redhat.com,
sean.j.christopherson@intel.com, wanpengli@tencent.com,
jasowang@redhat.com
Cc: virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, kvm@vger.kernel.org,
Zhu Lingshan <lingshan.zhu@intel.com>
Subject: [PATCH V2 0/6] IRQ offloading for vDPA
Date: Thu, 16 Jul 2020 19:23:43 +0800 [thread overview]
Message-ID: <1594898629-18790-1-git-send-email-lingshan.zhu@intel.com> (raw)
This series intends to implement IRQ offloading for
vhost_vdpa.
By the feat of irq forwarding facilities like posted
interrupt on X86, irq bypass can help deliver
interrupts to vCPU directly.
vDPA devices have dedicated hardware backends like VFIO
pass-throughed devices. So it would be possible to setup
irq offloading(irq bypass) for vDPA devices and gain
performance improvements.
In my testing, with this feature, we can save 0.1ms
in a ping between two VFs on average.
changes from V1:
(1)dropped vfio changes.
(3)removed KVM_HVAE_IRQ_BYPASS checks
(4)locking fixes
(5)simplified vhost_vdpa_update_vq_irq()
(6)minor improvements
Zhu Lingshan (6):
vhost: introduce vhost_call_ctx
kvm: detect assigned device via irqbypass manager
vDPA: implement IRQ offloading helpers in vDPA core
vhost_vdpa: implement IRQ offloading in vhost_vdpa
ifcvf: replace irq_request/free with vDPA helpers
irqbypass: do not start cons/prod when failed connect
arch/x86/kvm/x86.c | 10 ++++++--
drivers/vdpa/ifcvf/ifcvf_main.c | 14 +++++++----
drivers/vdpa/vdpa.c | 42 +++++++++++++++++++++++++++++++++
drivers/vhost/Kconfig | 1 +
drivers/vhost/vdpa.c | 52 +++++++++++++++++++++++++++++++++++++++--
drivers/vhost/vhost.c | 22 ++++++++++++-----
drivers/vhost/vhost.h | 9 ++++++-
include/linux/vdpa.h | 13 +++++++++++
virt/lib/irqbypass.c | 16 ++++++++-----
9 files changed, 157 insertions(+), 22 deletions(-)
--
1.8.3.1
next reply other threads:[~2020-07-16 11:27 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-16 11:23 Zhu Lingshan [this message]
2020-07-16 11:23 ` [PATCH V2 1/6] vhost: introduce vhost_call_ctx Zhu Lingshan
2020-07-17 3:32 ` Jason Wang
2020-07-20 7:40 ` Zhu, Lingshan
2020-07-16 11:23 ` [PATCH V2 2/6] kvm: detect assigned device via irqbypass manager Zhu Lingshan
2020-07-17 4:01 ` Jason Wang
2020-07-20 7:40 ` Zhu, Lingshan
2020-07-17 18:08 ` Alex Williamson
2020-07-20 4:19 ` Jason Wang
2020-07-16 11:23 ` [PATCH V2 3/6] vDPA: implement IRQ offloading helpers in vDPA core Zhu Lingshan
2020-07-17 4:19 ` Jason Wang
[not found] ` <45b2cc93-6ae1-47c7-aae6-01afdab1094b@intel.com>
2020-07-20 9:40 ` Jason Wang
[not found] ` <8c9adead-d3a0-374e-e817-3cb5a44c4bda@intel.com>
2020-07-21 2:51 ` Jason Wang
2020-07-16 11:23 ` [PATCH V2 4/6] vhost_vdpa: implement IRQ offloading in vhost_vdpa Zhu Lingshan
2020-07-17 5:29 ` Jason Wang
2020-07-17 10:07 ` kernel test robot
2020-07-17 10:07 ` kernel test robot
2020-07-17 10:07 ` kernel test robot
2020-07-16 11:23 ` [PATCH V2 5/6] ifcvf: replace irq_request/free with vDPA helpers Zhu Lingshan
2020-07-17 5:32 ` Jason Wang
2020-07-16 11:23 ` [PATCH V2 6/6] irqbypass: do not start cons/prod when failed connect Zhu Lingshan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1594898629-18790-1-git-send-email-lingshan.zhu@intel.com \
--to=lingshan.zhu@intel.com \
--cc=alex.williamson@redhat.com \
--cc=jasowang@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=mst@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=sean.j.christopherson@intel.com \
--cc=virtualization@lists.linux-foundation.org \
--cc=wanpengli@tencent.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.