On Tue, Nov 7, 2017 at 8:32 AM, Steve Freitas <sfl...@ihonk.com> wrote:
> On 11/07/2017 06:51 AM, Alex Williamson wrote: > > On Mon, Nov 6, 2017 at 11:58 PM, Steve Freitas <sfl...@ihonk.com> wrote: > >> On 11/06/2017 07:01 PM, Marcial Ascencio wrote: >> >>> Hi guys, i was planning to buy USB card with at least 2 usb ports to >>> assign each one to each VM, so I'm asking some advice about a brand that >>> works soft with Linux VFIO. Thank you so much in advance! >>> >> >> Hi Marcial, >> >> The Sonnet Allegro Pro worked great for me: >> https://amazon.com/Sonnet-Allegro-Pro-PCIe-card/dp/B00XPUHO10/ >> >> I pass three of the four controllers through to different VMs, no ACS >> override necessary on my machine. VM reboots work without an issue. An >> earlier post on this mailing list indicated problems with this card with VM >> reboots, but that seems to have been resolved in more recent kernels. My >> host runs Ubuntu 17.04, kernel 4.10. >> > > Does the PCIe switch actually support ACS on the downstream ports for this > card? I've seen some reports that certain switch configurations are > incorrectly allowing separate iommu groups where they shouldn't. Fair > warning, we're probably going to need to fix that and break some > configurations that were incorrectly grouped. Thanks, > > > Yer breakin' my heart! :-) > > Good question, how do I check that? > Send 'sudo lspci -vvv'
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