[Xen-users] Q: how to solve "shared RMRR" / "gfn already mapped" / GSI ?

[HÃkon Alstadheim <hakon@xxxxxxxxxxxxxxxxxx>]

Hi all, I'm running xen 4.6.0 since yesterday, and I really appreciate
the progress that is being made, which finally allows me to state my
problem concisely, so an answer /might/ be possible :-) .

I am trying to pass through a usb-card to a windows domU, and it is not
working. A while ago (well before 4.6) it was working for quite a while,
then it stopped, without me being able to pinpoint what had changed.

Now, after 4.6 , I have it working for a linux domU, but not for windows
8.1. Both are identical hvms as much as possible. For the linux domU,
(which is working) xen console says:
-------
(XEN) [2015-10-14 08:28:27] [VT-D] It's risky to assign 0000:04:00.0
with shared RMRR at 7dbcb000 for Dom5.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbcb, gfn
already mapped to bbdbcb.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbcc, gfn
already mapped to bbdbcc.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbcd, gfn
already mapped to bbdbcd.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbce, gfn
already mapped to bbdbce.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbcf, gfn
already mapped to bbdbcf.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd0, gfn
already mapped to bbdbd0.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd1, gfn
already mapped to bbdbd1.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd2, gfn
already mapped to bbdbd2.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd3, gfn
already mapped to bbdbd3.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd4, gfn
already mapped to bbdbd4.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd5, gfn
already mapped to bbdbd5.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd6, gfn
already mapped to bbdbd6.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd7, gfn
already mapped to bbdbd7.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd8, gfn
already mapped to bbdbd8.
(XEN) [2015-10-14 08:28:27] Cannot setup identity map d5:7dbd9, gfn
already mapped to bbdbd9.
(XEN) [2015-10-14 08:28:31] Direct Vector 0xf3
-------
For the windows domU (which is NOT WORKING) xen console says:
-------
(XEN) [2015-10-14 08:54:43] [VT-D] It's risky to assign 0000:04:00.0
with shared RMRR at 7dbcb000 for Dom6.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbcb, gfn
already mapped to cfdbcb.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbcc, gfn
already mapped to cfdbcc.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbcd, gfn
already mapped to cfdbcd.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbce, gfn
already mapped to cfdbce.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbcf, gfn
already mapped to cfdbcf.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd0, gfn
already mapped to cfdbd0.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd1, gfn
already mapped to cfdbd1.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd2, gfn
already mapped to cfdbd2.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd3, gfn
already mapped to cfdbd3.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd4, gfn
already mapped to cfdbd4.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd5, gfn
already mapped to cfdbd5.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd6, gfn
already mapped to cfdbd6.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd7, gfn
already mapped to cfdbd7.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd8, gfn
already mapped to cfdbd8.
(XEN) [2015-10-14 08:54:43] Cannot setup identity map d6:7dbd9, gfn
already mapped to cfdbd9.
(XEN) [2015-10-14 08:55:05] GSI 28
------
After which usb is not working ( and I have no mouse&kbd, and I can not
run the scanner for which I want the VM in the first place) .

Is there a way to tweak bios or Xen to make this conflict go away?

For reference, I start the vm with this command, identical for both vms:
/usr/sbin/xl create windows.hvm
'pci=["82:00.0","04:00.0,rdm_policy=relaxed"]'

--- windows.hvm file contents: --------------------------
name = "windows.hvm"
builder = "hvm"
vcpus = 8
pool="Pool-1"
memory = 6144
localtime = 1
no_migrate = 1
timer_mode = "one_missed_tick_pending"

device_model_version="qemu-xen-traditional"

disk = [ '/dev/system/winsys,raw,hda,rw'
,'/dev/system/windata,raw,hdb,rw'
,'file:/usr/local/share/xen/cd-images/ASMEDIA_USB_2-02.iso,hdc:cdrom,r']

vif = [ 'mac=02:16:3e:00:00:05,model=e1000']

on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'
boot = 'cd'
acpi = '1'
viridian = '1'
sdl = '0'
vnc = '1'
videoram=16
stdvga=1
vnclisten="0.0.0.0"
vncpasswd = ''
usb = '1'
usbdevices=['tablet']
---- windows.hvm ends ----


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