From mboxrd@z Thu Jan 1 00:00:00 1970 From: keith.busch@intel.com (Keith Busch) Date: Tue, 3 Oct 2017 09:06:49 -0600 Subject: [PATCH] nvme-pci: Use PCI bus address for data/queues in CMB In-Reply-To: References: <1506662966-10865-1-git-send-email-abhishek.shah@broadcom.com> <20170929144242.GN8463@localhost.localdomain> Message-ID: <20171003150649.GA2195@localhost.localdomain> On Sat, Sep 30, 2017@02:30:16PM +0530, Abhishek Shah wrote: > > On a similar note, we also break CMB usage in virutalization with direct > > assigned devices: the guest doesn't know the host physical bus address, > > so it sets the CMB queue address incorrectly there, too. I don't know of > > a way to fix that other than disabling CMB. > > I don't have much idea on CMB usage in virtualization... will let > someone else comment on this. It's okay, I think it's a gap in the NVMe specification that would allow such usage.