<div dir="ltr">Thanks for link, gonna try to find the proper kernel patch then.</div><div class="gmail_extra"> <div class="gmail_quote">2016-02-17 23:10 GMT+01:00 Alex Williamson <<a href="mailto:alex.williamson@redhat.com" target="_blank">alex.williamson@redhat.com</a>>: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Wed, 17 Feb 2016 23:02:18 +0100 thibaut noah <<a href="mailto:thibaut.noah@gmail.com">thibaut.noah@gmail.com</a>> wrote: > I thought the patch was already applied in the version of fedora i was > using (4.2.3) There is currently no expectation that the pcie_acs_override patch will ever go upstream, thus my encouragement to use a system that properly supports ACS. > Nope, i thought this one meant boot was a valid option. > "The pcie_acs_override= boot option lets users opt-in specific devices or > sets of devices to assume ACS support." > > My bad for the id. > How does one apply the patch to the kernel? <a href="https://www.kernel.org/doc/Documentation/applying-patches.txt" rel="noreferrer" target="_blank">https://www.kernel.org/doc/Documentation/applying-patches.txt</a> <div class="HOEnZb"><div class="h5"> > 2016-02-17 22:07 GMT+01:00 Alex Williamson <<a href="mailto:alex.williamson@redhat.com">alex.williamson@redhat.com</a>>: > > > On Wed, 17 Feb 2016 20:57:34 +0100 > > thibaut noah <<a href="mailto:thibaut.noah@gmail.com">thibaut.noah@gmail.com</a>> wrote: > > > > > Hello, i finally received an hba card for my zfs raid and the card is off > > > course breaking iommu grouping. > > > I tried the 2pci ports i had left (gpu in the first one) but the hba card > > > is always in group 1. > > > I tried several options in grub to override acs but that didn't change > > > anything (had downstream set before, added other options). > > > Could someone point me to a documentation or something to fix this? i > > > cannot use my vm at all > > > Here is a paste of the error i get : > > > > > > <a href="http://fpaste.org/324296/45573902/" rel="noreferrer" target="_blank">http://fpaste.org/324296/45573902/</a> > > > > > > paste of grub file : > > > <a href="http://fpaste.org/324284/45573856/" rel="noreferrer" target="_blank">http://fpaste.org/324284/45573856/</a> > > > > > > paste of ls -lha /sys/bus/pci/devices/0000:01:00.0/iommu_group/devices : > > > <a href="http://fpaste.org/324283/38515145/" rel="noreferrer" target="_blank">http://fpaste.org/324283/38515145/</a> > > > > > > here is a paste of lspci -vvvnn : > > > <a href="http://fpaste.org/324281/55738407/" rel="noreferrer" target="_blank">http://fpaste.org/324281/55738407/</a> > > > > > > Any help would be gladly appreciated thanks > > > > First, are you using a kernel that's patched with the pcie_acs_override > > option? It's not upstream. You also have: > > > > pcie_acs_override=downstream,id:103c:21c7,boot > > > > 103c:21c7 is the subsystem ID of your HBA, it's a single function > > endpoint, so that entry is useless on a couple fronts. 'boot' is not a > > valid option, maybe you ran into another option? > > > > pcie_acs_override=downstream > > > > should be sufficient, if you want to use id, it's the IDs of the root > > ports, for example: > > > > pcie_acs_override=id:8086:0c01,id:8086:0c09 > > > > But of course nothing happens till the kernel is patched. > > </div></div></blockquote></div> </div>