From: Paolo Bonzini <pbonzini@redhat.com>
To: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Cc: kvm@vger.kernel.org, guangrong xiao <guangrong.xiao@linux.intel.com>
Subject: Re: SR-PCIM support in KVM
Date: Mon, 31 Oct 2016 04:09:10 -0400 (EDT) [thread overview]
Message-ID: <2129818337.9626448.1477901350808.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <8520D5D51A55D047800579B0941471982599A856@XAP-PVEXMBX01.xlnx.xilinx.com>
> > > As per the following link:
> > > https://www.linux-kvm.org/images/6/6a/KvmForum2008$kdf2008_7.pdf
> > >
> > > It says that for software based virtual mailbox we require SR-PCIM
> > > support.
> > >
> > > So for this purpose is SR-PCIM implemented as part of KVM ?
> > > Or is there any other method that KVM provides for communication
> > > between PF & VF ?
> >
> > Hi, SR-IOV is not part of KVM (the virtual machine monitor kernel module).
> > In PCIe terms, when using KVM the "VI" or Virtualization Intermediary is
> > the Linux VFIO driver. SR-IOV management is split between the PF driver
> > and VFIO.
>
> Thanks Paolo.
>
> If Linux VIFO driver acts as VI, as per spec SR-PCIM is "Software responsible
> for the configuration of the SR-IOV capability, management of Physical
> Functions and Virtual Functions" So if we use kvm who does above work of SR-PCIM ?
It's split between VFIO and the PF driver.
> Does VFIO driver provide any methods for PF & VF communication.
No, those are in the PF driver (ixgbe for example).
Paolo
next prev parent reply other threads:[~2016-10-31 8:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-28 12:03 SR-PCIM support in KVM Bharat Kumar Gogada
2016-10-29 13:42 ` Paolo Bonzini
2016-10-31 6:17 ` Bharat Kumar Gogada
2016-10-31 8:09 ` Paolo Bonzini [this message]
2016-11-02 5:33 ` Bharat Kumar Gogada
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