Eric W. Biederman wrote: > Yinghai Lu <yinghai@xxxxxxxxxx> writes: > >> Eric W. Biederman wrote: >>> Yinghai Lu <yinghai@xxxxxxxxxx> writes: >>>> after closing look up the code, it looks it will not break your setup. >>>> >>>> 1. before the patches: >>>> a. when master card is inserted, all bridge in that card will get assigned with min_size >>>> b. when new cards is inserted to those slots in master card, will get assigned in the bridge size. >>>> >>>> 2. after the patches: v5 >>>> a. booted up, all leaf bridge mmio get clearred. >>>> b. when master card is inserted, all bridge in that card will get assigned with min_size, and master bridge will be sum of them >>>> c. when new cards is inserted to those slots in master card, will get assigned in the bridge size. >>>> >>>> can you check those two patches in your setup to verify it? >>> I have a much simpler case I will break, as I tried something similar by accident. >> which kernel version? >>> AMD cpu MCP55 with one pcie port setup as hotplug. >>> The system only has 2GB of RAM. So plenty of space for pcie devices. >> one or two ht chains? > > One chain. > >> do you still have lspci -tv with it? >> >>> If the firmware assigns nothing and linux at boot time assigns the pci mmio space: >>> Reads from the bar of the hotplugged device work >>> Writes to the bar of the hotplugged device, cause further writes to go to lala land. >>> >>> So I had to have the firmware make the assignment, because only it knows the >>> details of the hidden AMD bar registers for each hypertransport chain etc. >> that mean kernel doesn't get peer root bus res probed properly > > How do you do that without having drivers for the peer root bus? we have amd_bus.c to handle amd k8 system with two chains. but one chain is skipped. (wonder if need to reenable that for one chain k8 system) another intel_bus.c is on the way to 2.6.33. when use_crs is used, those info from pci conf space is not used but just print out for check if _CRS is right or not. YH -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
