on a Xen server,
```
xl info | egrep "release|xen_version"
release : 5.4.11-24.g2d02eb4-default
xen_version : 4.13.0_04-lp151.688
lsb_release -rd
Description: openSUSE Leap 15.1
Release: 15.1
```
after 'successful' boot, logs report
```
xl dmesg
[ 0.379423] pci 0000:00:1a.0: reg 0x10: [mem 0xecb38000-0xecb383ff]
[ 0.379868] pci 0000:00:1a.0: PME# supported from D0 D3hot D3cold
[ 0.380017] pci 0000:00:1a.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.380447] pci 0000:00:1b.0: [8086:8c20] type 00 class 0x040300
[ 0.380572] pci 0000:00:1b.0: reg 0x10: [mem 0xecb30000-0xecb33fff 64bit]
[ 0.380956] pci 0000:00:1b.0: PME# supported from D0 D3hot D3cold
[ 0.381138] pci 0000:00:1b.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.381551] pci 0000:00:1c.0: [8086:8c10] type 01 class 0x060400
[ 0.382048] pci 0000:00:1c.0: PME# supported from D0 D3hot D3cold
[ 0.382288] pci 0000:00:1c.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.382359] pci 0000:00:1c.1: [8086:8c12] type 01 class 0x060400
[ 0.382849] pci 0000:00:1c.1: PME# supported from D0 D3hot D3cold
[ 0.383093] pci 0000:00:1c.1: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.383164] pci 0000:00:1c.3: [8086:8c16] type 01 class 0x060400
[ 0.383666] pci 0000:00:1c.3: PME# supported from D0 D3hot D3cold
[ 0.383906] pci 0000:00:1c.3: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.383972] pci 0000:00:1c.4: [8086:8c18] type 01 class 0x060400
[ 0.384477] pci 0000:00:1c.4: PME# supported from D0 D3hot D3cold
[ 0.384716] pci 0000:00:1c.4: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.385150] pci 0000:00:1d.0: [8086:8c26] type 00 class 0x0c0320
[ 0.385277] pci 0000:00:1d.0: reg 0x10: [mem 0xecb37000-0xecb373ff]
[ 0.385717] pci 0000:00:1d.0: PME# supported from D0 D3hot D3cold
[ 0.385860] pci 0000:00:1d.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.386627] pci 0000:00:1f.0: [8086:8c56] type 00 class 0x060100
[ 0.387137] pci 0000:00:1f.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.387207] pci 0000:00:1f.2: [8086:8c02] type 00 class 0x010601
[ 0.387323] pci 0000:00:1f.2: reg 0x10: [io 0xf070-0xf077]
[ 0.387388] pci 0000:00:1f.2: reg 0x14: [io 0xf060-0xf063]
[ 0.387452] pci 0000:00:1f.2: reg 0x18: [io 0xf050-0xf057]
[ 0.387539] pci 0000:00:1f.2: reg 0x1c: [io 0xf040-0xf043]
[ 0.387597] pci 0000:00:1f.2: reg 0x20: [io 0xf000-0xf01f]
[ 0.387662] pci 0000:00:1f.2: reg 0x24: [mem 0xecb36000-0xecb367ff]
[ 0.387882] pci 0000:00:1f.2: PME# supported from D3hot
[ 0.388026] pci 0000:00:1f.2: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.388073] pci 0000:00:1f.3: [8086:8c22] type 00 class 0x0c0500
[ 0.388193] pci 0000:00:1f.3: reg 0x10: [mem 0xecb35000-0xecb350ff 64bit]
[ 0.388348] pci 0000:00:1f.3: reg 0x20: [io 0x0580-0x059f]
[ 0.388560] pci 0000:00:1f.3: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.388631] pci 0000:00:1f.6: [8086:8c24] type 00 class 0x118000
[ 0.388744] pci 0000:00:1f.6: reg 0x10: [mem 0xecb34000-0xecb34fff 64bit]
[ 0.389106] pci 0000:00:1f.6: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.389631] pci 0000:01:00.0: [1b4b:9485] type 00 class 0x010400
[ 0.390050] pci 0000:01:00.0: reg 0x10: [mem 0xeca40000-0xeca5ffff 64bit]
[ 0.390445] pci 0000:01:00.0: reg 0x18: [mem 0xeca00000-0xeca3ffff 64bit]
[ 0.391451] pci 0000:01:00.0: reg 0x30: [mem 0xeca60000-0xeca6ffff pref]
[ 0.391685] pci 0000:01:00.0: supports D1
[ 0.391695] pci 0000:01:00.0: PME# supported from D0 D1 D3hot
[ 0.391876] pci 0000:01:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.403034] pci 0000:00:01.0: PCI bridge to [bus 01]
[ 0.403063] pci 0000:00:01.0: bridge window [mem 0xeca00000-0xecafffff]
[ 0.403243] pci 0000:02:00.0: [10de:1288] type 00 class 0x030000
[ 0.403630] pci 0000:02:00.0: reg 0x10: [mem 0xeb000000-0xebffffff]
[ 0.403964] pci 0000:02:00.0: reg 0x14: [mem 0xc8000000-0xcfffffff 64bit pref]
[ 0.404335] pci 0000:02:00.0: reg 0x1c: [mem 0xd0000000-0xd1ffffff 64bit pref]
[ 0.404653] pci 0000:02:00.0: reg 0x24: [io 0xe000-0xe07f]
[ 0.404967] pci 0000:02:00.0: reg 0x30: [mem 0xec000000-0xec07ffff pref]
[ 0.405319] pci 0000:02:00.0: 16.000 Gb/s available PCIe bandwidth, limited by 5 GT/s x4 link at 0000:00:01.1 (capable of 32.000 Gb/s with 5 GT/s x8 link)
[ 0.405411] pci 0000:02:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.405483] pci 0000:02:00.1: [10de:0e0f] type 00 class 0x040300
[ 0.405597] pci 0000:02:00.1: reg 0x10: [mem 0xec080000-0xec083fff]
[ 0.406156] pci 0000:02:00.1: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.417338] pci 0000:00:01.1: PCI bridge to [bus 02]
[ 0.417359] pci 0000:00:01.1: bridge window [io 0xe000-0xefff]
[ 0.417383] pci 0000:00:01.1: bridge window [mem 0xeb000000-0xec0fffff]
[ 0.417413] pci 0000:00:01.1: bridge window [mem 0xc8000000-0xd1ffffff 64bit pref]
[ 0.417579] pci 0000:03:00.0: [1106:3483] type 00 class 0x0c0330
[ 0.417694] pci 0000:03:00.0: reg 0x10: [mem 0xec900000-0xec900fff 64bit]
[ 0.418052] pci 0000:03:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.418215] pci 0000:03:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.429095] pci 0000:00:01.2: PCI bridge to [bus 03]
[ 0.429122] pci 0000:00:01.2: bridge window [mem 0xec900000-0xec9fffff]
[ 0.429391] pci 0000:04:00.0: [1b21:0612] type 00 class 0x010601
[ 0.429541] pci 0000:04:00.0: reg 0x10: [io 0xd050-0xd057]
[ 0.429633] pci 0000:04:00.0: reg 0x14: [io 0xd040-0xd043]
[ 0.429726] pci 0000:04:00.0: reg 0x18: [io 0xd030-0xd037]
[ 0.429815] pci 0000:04:00.0: reg 0x1c: [io 0xd020-0xd023]
[ 0.429907] pci 0000:04:00.0: reg 0x20: [io 0xd000-0xd01f]
[ 0.430002] pci 0000:04:00.0: reg 0x24: [mem 0xec800000-0xec8001ff]
[ 0.430499] pci 0000:04:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.441079] pci 0000:00:1c.0: PCI bridge to [bus 04]
[ 0.441106] pci 0000:00:1c.0: bridge window [io 0xd000-0xdfff]
[ 0.441135] pci 0000:00:1c.0: bridge window [mem 0xec800000-0xec8fffff]
[ 0.441396] pci 0000:05:00.0: [10b5:8606] type 01 class 0x060400
[ 0.441736] pci 0000:05:00.0: reg 0x10: [mem 0xec600000-0xec61ffff]
[ 0.442579] pci 0000:05:00.0: PME# supported from D0 D3hot D3cold
[ 0.442982] pci 0000:05:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.454122] pci 0000:00:1c.1: PCI bridge to [bus 05-0f]
[ 0.454150] pci 0000:00:1c.1: bridge window [io 0x9000-0xbfff]
[ 0.454179] pci 0000:00:1c.1: bridge window [mem 0xec100000-0xec6fffff]
[ 0.454218] pci 0000:00:1c.1: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.454764] pci 0000:06:01.0: [10b5:8606] type 01 class 0x060400
[ 0.455455] pci 0000:06:01.0: PME# supported from D0 D3hot D3cold
[ 0.455721] pci 0000:06:01.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.456864] pci 0000:06:04.0: [10b5:8606] type 01 class 0x060400
[ 0.457488] pci 0000:06:04.0: PME# supported from D0 D3hot D3cold
[ 0.457719] pci 0000:06:04.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.458122] pci 0000:06:05.0: [10b5:8606] type 01 class 0x060400
[ 0.458745] pci 0000:06:05.0: PME# supported from D0 D3hot D3cold
[ 0.458977] pci 0000:06:05.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.459714] pci 0000:06:07.0: [10b5:8606] type 01 class 0x060400
[ 0.460373] pci 0000:06:07.0: PME# supported from D0 D3hot D3cold
[ 0.460608] pci 0000:06:07.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.461345] pci 0000:06:09.0: [10b5:8606] type 01 class 0x060400
[ 0.461967] pci 0000:06:09.0: PME# supported from D0 D3hot D3cold
[ 0.462196] pci 0000:06:09.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.469990] pci 0000:05:00.0: PCI bridge to [bus 06-0f]
[ 0.470026] pci 0000:05:00.0: bridge window [io 0x9000-0xbfff]
[ 0.470056] pci 0000:05:00.0: bridge window [mem 0xec100000-0xec5fffff]
[ 0.470095] pci 0000:05:00.0: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.470287] pci 0000:07:00.0: [1b4b:9215] type 00 class 0x010601
[ 0.470461] pci 0000:07:00.0: reg 0x10: [io 0xb050-0xb057]
[ 0.470574] pci 0000:07:00.0: reg 0x14: [io 0xb040-0xb043]
[ 0.470697] pci 0000:07:00.0: reg 0x18: [io 0xb030-0xb037]
[ 0.470809] pci 0000:07:00.0: reg 0x1c: [io 0xb020-0xb023]
[ 0.470897] pci 0000:07:00.0: reg 0x20: [io 0xb000-0xb01f]
[ 0.470995] pci 0000:07:00.0: reg 0x24: [mem 0xec510000-0xec5107ff]
[ 0.471095] pci 0000:07:00.0: reg 0x30: [mem 0xec500000-0xec50ffff pref]
[ 0.471351] pci 0000:07:00.0: PME# supported from D3hot
[ 0.471580] pci 0000:07:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.482157] pci 0000:06:01.0: PCI bridge to [bus 07]
[ 0.482193] pci 0000:06:01.0: bridge window [io 0xb000-0xbfff]
[ 0.482222] pci 0000:06:01.0: bridge window [mem 0xec500000-0xec5fffff]
[ 0.482437] pci 0000:08:00.0: [10b5:8603] type 01 class 0x060400
[ 0.482677] pci 0000:08:00.0: reg 0x10: [mem 0xec400000-0xec403fff]
[ 0.483392] pci 0000:08:00.0: supports D1 D2
[ 0.483405] pci 0000:08:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.483792] pci 0000:08:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.494384] pci 0000:06:04.0: PCI bridge to [bus 08-0b]
[ 0.494420] pci 0000:06:04.0: bridge window [io 0x9000-0xafff]
[ 0.494449] pci 0000:06:04.0: bridge window [mem 0xec400000-0xec4fffff]
[ 0.494487] pci 0000:06:04.0: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.495043] pci 0000:09:01.0: [10b5:8603] type 01 class 0x060400
[ 0.495784] pci 0000:09:01.0: supports D1 D2
[ 0.495796] pci 0000:09:01.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.496076] pci 0000:09:01.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.496506] pci 0000:09:02.0: [10b5:8603] type 01 class 0x060400
[ 0.497245] pci 0000:09:02.0: supports D1 D2
[ 0.497258] pci 0000:09:02.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.497525] pci 0000:09:02.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.507727] pci 0000:08:00.0: PCI bridge to [bus 09-0b]
[ 0.507766] pci 0000:08:00.0: bridge window [io 0x9000-0xafff]
[ 0.507819] pci 0000:08:00.0: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.508049] pci 0000:0a:00.0: [10ec:8168] type 00 class 0x020000
[ 0.508192] pci 0000:0a:00.0: reg 0x10: [io 0xa000-0xa0ff]
[ 0.508312] pci 0000:0a:00.0: reg 0x18: [mem 0xd2204000-0xd2204fff 64bit pref]
[ 0.508405] pci 0000:0a:00.0: reg 0x20: [mem 0xd2200000-0xd2203fff 64bit pref]
[ 0.508861] pci 0000:0a:00.0: supports D1 D2
[ 0.508874] pci 0000:0a:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.509229] pci 0000:0a:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.519769] pci 0000:09:01.0: PCI bridge to [bus 0a]
[ 0.519810] pci 0000:09:01.0: bridge window [io 0xa000-0xafff]
[ 0.519862] pci 0000:09:01.0: bridge window [mem 0xd2200000-0xd22fffff 64bit pref]
[ 0.520102] pci 0000:0b:00.0: [10ec:8168] type 00 class 0x020000
[ 0.520244] pci 0000:0b:00.0: reg 0x10: [io 0x9000-0x90ff]
[ 0.520364] pci 0000:0b:00.0: reg 0x18: [mem 0xd2104000-0xd2104fff 64bit pref]
[ 0.520463] pci 0000:0b:00.0: reg 0x20: [mem 0xd2100000-0xd2103fff 64bit pref]
[ 0.520951] pci 0000:0b:00.0: supports D1 D2
[ 0.520963] pci 0000:0b:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.521315] pci 0000:0b:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.531848] pci 0000:09:02.0: PCI bridge to [bus 0b]
[ 0.531888] pci 0000:09:02.0: bridge window [io 0x9000-0x9fff]
[ 0.531941] pci 0000:09:02.0: bridge window [mem 0xd2100000-0xd21fffff 64bit pref]
[ 0.542689] pci 0000:06:05.0: PCI bridge to [bus 0c]
[ 0.542935] pci 0000:0d:00.0: [1912:0014] type 00 class 0x0c0330
[ 0.543147] pci 0000:0d:00.0: reg 0x10: [mem 0xec300000-0xec301fff 64bit]
[ 0.543927] pci 0000:0d:00.0: PME# supported from D0 D3hot D3cold
[ 0.544183] pci 0000:0d:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.554754] pci 0000:06:07.0: PCI bridge to [bus 0d]
[ 0.554799] pci 0000:06:07.0: bridge window [mem 0xec300000-0xec3fffff]
[ 0.555019] pci 0000:0e:00.0: [104c:823e] type 01 class 0x060400
[ 0.555299] pci 0000:0e:00.0: reg 0x14: [mem 0xec200000-0xec200fff]
[ 0.555756] pci 0000:0e:00.0: supports D1 D2
[ 0.555947] pci 0000:0e:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.566531] pci 0000:06:09.0: PCI bridge to [bus 0e-0f]
[ 0.566576] pci 0000:06:09.0: bridge window [mem 0xec100000-0xec2fffff]
[ 0.566783] pci_bus 0000:0f: extended config space not accessible
[ 0.566847] pci 0000:0f:00.0: [104c:823f] type 00 class 0x0c0010
[ 0.566943] pci 0000:0f:00.0: reg 0x10: [mem 0xec104000-0xec1047ff]
[ 0.566997] pci 0000:0f:00.0: reg 0x14: [mem 0xec100000-0xec103fff]
[ 0.567296] pci 0000:0f:00.0: supports D1 D2
[ 0.567309] pci 0000:0f:00.0: PME# supported from D0 D1 D2 D3hot
[ 0.567401] pci 0000:0f:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.578264] pci 0000:0e:00.0: PCI bridge to [bus 0f]
[ 0.578314] pci 0000:0e:00.0: bridge window [mem 0xec100000-0xec1fffff]
[ 0.578768] pci 0000:10:00.0: [8086:1533] type 00 class 0x020000
[ 0.579439] pci 0000:10:00.0: reg 0x10: [mem 0xec700000-0xec77ffff]
[ 0.580111] pci 0000:10:00.0: reg 0x18: [io 0xc000-0xc01f]
[ 0.580642] pci 0000:10:00.0: reg 0x1c: [mem 0xec780000-0xec783fff]
[ 0.582673] pci 0000:10:00.0: PME# supported from D0 D3hot D3cold
[ 0.583043] pci 0000:10:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.594203] pci 0000:00:1c.3: PCI bridge to [bus 10]
[ 0.594231] pci 0000:00:1c.3: bridge window [io 0xc000-0xcfff]
[ 0.594261] pci 0000:00:1c.3: bridge window [mem 0xec700000-0xec7fffff]
[ 0.594502] acpiphp: Slot [1] registered
...
```
Atm, I've no guests, and no explicit passthrough
```
xl list
Name ID Mem VCPUs State Time(s)
Domain-0 0 4015 4 r----- 3946.9
Xenstore 1 31 1 -b---- 0.0
```
afaict, so far, these "Failed to add - passthrough or MSI/MSI-X might fail!" aren't causing me any _noticeable_ problems.
ARE they an actual problem that can/should be fixed?
Or just noise that can be quieted down?
_______________________________________________
Xen-users mailing list
Xen-users@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-users
```
xl info | egrep "release|xen_version"
release : 5.4.11-24.g2d02eb4-default
xen_version : 4.13.0_04-lp151.688
lsb_release -rd
Description: openSUSE Leap 15.1
Release: 15.1
```
after 'successful' boot, logs report
```
xl dmesg
[ 0.379423] pci 0000:00:1a.0: reg 0x10: [mem 0xecb38000-0xecb383ff]
[ 0.379868] pci 0000:00:1a.0: PME# supported from D0 D3hot D3cold
[ 0.380017] pci 0000:00:1a.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.380447] pci 0000:00:1b.0: [8086:8c20] type 00 class 0x040300
[ 0.380572] pci 0000:00:1b.0: reg 0x10: [mem 0xecb30000-0xecb33fff 64bit]
[ 0.380956] pci 0000:00:1b.0: PME# supported from D0 D3hot D3cold
[ 0.381138] pci 0000:00:1b.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.381551] pci 0000:00:1c.0: [8086:8c10] type 01 class 0x060400
[ 0.382048] pci 0000:00:1c.0: PME# supported from D0 D3hot D3cold
[ 0.382288] pci 0000:00:1c.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.382359] pci 0000:00:1c.1: [8086:8c12] type 01 class 0x060400
[ 0.382849] pci 0000:00:1c.1: PME# supported from D0 D3hot D3cold
[ 0.383093] pci 0000:00:1c.1: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.383164] pci 0000:00:1c.3: [8086:8c16] type 01 class 0x060400
[ 0.383666] pci 0000:00:1c.3: PME# supported from D0 D3hot D3cold
[ 0.383906] pci 0000:00:1c.3: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.383972] pci 0000:00:1c.4: [8086:8c18] type 01 class 0x060400
[ 0.384477] pci 0000:00:1c.4: PME# supported from D0 D3hot D3cold
[ 0.384716] pci 0000:00:1c.4: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.385150] pci 0000:00:1d.0: [8086:8c26] type 00 class 0x0c0320
[ 0.385277] pci 0000:00:1d.0: reg 0x10: [mem 0xecb37000-0xecb373ff]
[ 0.385717] pci 0000:00:1d.0: PME# supported from D0 D3hot D3cold
[ 0.385860] pci 0000:00:1d.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.386627] pci 0000:00:1f.0: [8086:8c56] type 00 class 0x060100
[ 0.387137] pci 0000:00:1f.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.387207] pci 0000:00:1f.2: [8086:8c02] type 00 class 0x010601
[ 0.387323] pci 0000:00:1f.2: reg 0x10: [io 0xf070-0xf077]
[ 0.387388] pci 0000:00:1f.2: reg 0x14: [io 0xf060-0xf063]
[ 0.387452] pci 0000:00:1f.2: reg 0x18: [io 0xf050-0xf057]
[ 0.387539] pci 0000:00:1f.2: reg 0x1c: [io 0xf040-0xf043]
[ 0.387597] pci 0000:00:1f.2: reg 0x20: [io 0xf000-0xf01f]
[ 0.387662] pci 0000:00:1f.2: reg 0x24: [mem 0xecb36000-0xecb367ff]
[ 0.387882] pci 0000:00:1f.2: PME# supported from D3hot
[ 0.388026] pci 0000:00:1f.2: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.388073] pci 0000:00:1f.3: [8086:8c22] type 00 class 0x0c0500
[ 0.388193] pci 0000:00:1f.3: reg 0x10: [mem 0xecb35000-0xecb350ff 64bit]
[ 0.388348] pci 0000:00:1f.3: reg 0x20: [io 0x0580-0x059f]
[ 0.388560] pci 0000:00:1f.3: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.388631] pci 0000:00:1f.6: [8086:8c24] type 00 class 0x118000
[ 0.388744] pci 0000:00:1f.6: reg 0x10: [mem 0xecb34000-0xecb34fff 64bit]
[ 0.389106] pci 0000:00:1f.6: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.389631] pci 0000:01:00.0: [1b4b:9485] type 00 class 0x010400
[ 0.390050] pci 0000:01:00.0: reg 0x10: [mem 0xeca40000-0xeca5ffff 64bit]
[ 0.390445] pci 0000:01:00.0: reg 0x18: [mem 0xeca00000-0xeca3ffff 64bit]
[ 0.391451] pci 0000:01:00.0: reg 0x30: [mem 0xeca60000-0xeca6ffff pref]
[ 0.391685] pci 0000:01:00.0: supports D1
[ 0.391695] pci 0000:01:00.0: PME# supported from D0 D1 D3hot
[ 0.391876] pci 0000:01:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.403034] pci 0000:00:01.0: PCI bridge to [bus 01]
[ 0.403063] pci 0000:00:01.0: bridge window [mem 0xeca00000-0xecafffff]
[ 0.403243] pci 0000:02:00.0: [10de:1288] type 00 class 0x030000
[ 0.403630] pci 0000:02:00.0: reg 0x10: [mem 0xeb000000-0xebffffff]
[ 0.403964] pci 0000:02:00.0: reg 0x14: [mem 0xc8000000-0xcfffffff 64bit pref]
[ 0.404335] pci 0000:02:00.0: reg 0x1c: [mem 0xd0000000-0xd1ffffff 64bit pref]
[ 0.404653] pci 0000:02:00.0: reg 0x24: [io 0xe000-0xe07f]
[ 0.404967] pci 0000:02:00.0: reg 0x30: [mem 0xec000000-0xec07ffff pref]
[ 0.405319] pci 0000:02:00.0: 16.000 Gb/s available PCIe bandwidth, limited by 5 GT/s x4 link at 0000:00:01.1 (capable of 32.000 Gb/s with 5 GT/s x8 link)
[ 0.405411] pci 0000:02:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.405483] pci 0000:02:00.1: [10de:0e0f] type 00 class 0x040300
[ 0.405597] pci 0000:02:00.1: reg 0x10: [mem 0xec080000-0xec083fff]
[ 0.406156] pci 0000:02:00.1: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.417338] pci 0000:00:01.1: PCI bridge to [bus 02]
[ 0.417359] pci 0000:00:01.1: bridge window [io 0xe000-0xefff]
[ 0.417383] pci 0000:00:01.1: bridge window [mem 0xeb000000-0xec0fffff]
[ 0.417413] pci 0000:00:01.1: bridge window [mem 0xc8000000-0xd1ffffff 64bit pref]
[ 0.417579] pci 0000:03:00.0: [1106:3483] type 00 class 0x0c0330
[ 0.417694] pci 0000:03:00.0: reg 0x10: [mem 0xec900000-0xec900fff 64bit]
[ 0.418052] pci 0000:03:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.418215] pci 0000:03:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.429095] pci 0000:00:01.2: PCI bridge to [bus 03]
[ 0.429122] pci 0000:00:01.2: bridge window [mem 0xec900000-0xec9fffff]
[ 0.429391] pci 0000:04:00.0: [1b21:0612] type 00 class 0x010601
[ 0.429541] pci 0000:04:00.0: reg 0x10: [io 0xd050-0xd057]
[ 0.429633] pci 0000:04:00.0: reg 0x14: [io 0xd040-0xd043]
[ 0.429726] pci 0000:04:00.0: reg 0x18: [io 0xd030-0xd037]
[ 0.429815] pci 0000:04:00.0: reg 0x1c: [io 0xd020-0xd023]
[ 0.429907] pci 0000:04:00.0: reg 0x20: [io 0xd000-0xd01f]
[ 0.430002] pci 0000:04:00.0: reg 0x24: [mem 0xec800000-0xec8001ff]
[ 0.430499] pci 0000:04:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.441079] pci 0000:00:1c.0: PCI bridge to [bus 04]
[ 0.441106] pci 0000:00:1c.0: bridge window [io 0xd000-0xdfff]
[ 0.441135] pci 0000:00:1c.0: bridge window [mem 0xec800000-0xec8fffff]
[ 0.441396] pci 0000:05:00.0: [10b5:8606] type 01 class 0x060400
[ 0.441736] pci 0000:05:00.0: reg 0x10: [mem 0xec600000-0xec61ffff]
[ 0.442579] pci 0000:05:00.0: PME# supported from D0 D3hot D3cold
[ 0.442982] pci 0000:05:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.454122] pci 0000:00:1c.1: PCI bridge to [bus 05-0f]
[ 0.454150] pci 0000:00:1c.1: bridge window [io 0x9000-0xbfff]
[ 0.454179] pci 0000:00:1c.1: bridge window [mem 0xec100000-0xec6fffff]
[ 0.454218] pci 0000:00:1c.1: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.454764] pci 0000:06:01.0: [10b5:8606] type 01 class 0x060400
[ 0.455455] pci 0000:06:01.0: PME# supported from D0 D3hot D3cold
[ 0.455721] pci 0000:06:01.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.456864] pci 0000:06:04.0: [10b5:8606] type 01 class 0x060400
[ 0.457488] pci 0000:06:04.0: PME# supported from D0 D3hot D3cold
[ 0.457719] pci 0000:06:04.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.458122] pci 0000:06:05.0: [10b5:8606] type 01 class 0x060400
[ 0.458745] pci 0000:06:05.0: PME# supported from D0 D3hot D3cold
[ 0.458977] pci 0000:06:05.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.459714] pci 0000:06:07.0: [10b5:8606] type 01 class 0x060400
[ 0.460373] pci 0000:06:07.0: PME# supported from D0 D3hot D3cold
[ 0.460608] pci 0000:06:07.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.461345] pci 0000:06:09.0: [10b5:8606] type 01 class 0x060400
[ 0.461967] pci 0000:06:09.0: PME# supported from D0 D3hot D3cold
[ 0.462196] pci 0000:06:09.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.469990] pci 0000:05:00.0: PCI bridge to [bus 06-0f]
[ 0.470026] pci 0000:05:00.0: bridge window [io 0x9000-0xbfff]
[ 0.470056] pci 0000:05:00.0: bridge window [mem 0xec100000-0xec5fffff]
[ 0.470095] pci 0000:05:00.0: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.470287] pci 0000:07:00.0: [1b4b:9215] type 00 class 0x010601
[ 0.470461] pci 0000:07:00.0: reg 0x10: [io 0xb050-0xb057]
[ 0.470574] pci 0000:07:00.0: reg 0x14: [io 0xb040-0xb043]
[ 0.470697] pci 0000:07:00.0: reg 0x18: [io 0xb030-0xb037]
[ 0.470809] pci 0000:07:00.0: reg 0x1c: [io 0xb020-0xb023]
[ 0.470897] pci 0000:07:00.0: reg 0x20: [io 0xb000-0xb01f]
[ 0.470995] pci 0000:07:00.0: reg 0x24: [mem 0xec510000-0xec5107ff]
[ 0.471095] pci 0000:07:00.0: reg 0x30: [mem 0xec500000-0xec50ffff pref]
[ 0.471351] pci 0000:07:00.0: PME# supported from D3hot
[ 0.471580] pci 0000:07:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.482157] pci 0000:06:01.0: PCI bridge to [bus 07]
[ 0.482193] pci 0000:06:01.0: bridge window [io 0xb000-0xbfff]
[ 0.482222] pci 0000:06:01.0: bridge window [mem 0xec500000-0xec5fffff]
[ 0.482437] pci 0000:08:00.0: [10b5:8603] type 01 class 0x060400
[ 0.482677] pci 0000:08:00.0: reg 0x10: [mem 0xec400000-0xec403fff]
[ 0.483392] pci 0000:08:00.0: supports D1 D2
[ 0.483405] pci 0000:08:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.483792] pci 0000:08:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.494384] pci 0000:06:04.0: PCI bridge to [bus 08-0b]
[ 0.494420] pci 0000:06:04.0: bridge window [io 0x9000-0xafff]
[ 0.494449] pci 0000:06:04.0: bridge window [mem 0xec400000-0xec4fffff]
[ 0.494487] pci 0000:06:04.0: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.495043] pci 0000:09:01.0: [10b5:8603] type 01 class 0x060400
[ 0.495784] pci 0000:09:01.0: supports D1 D2
[ 0.495796] pci 0000:09:01.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.496076] pci 0000:09:01.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.496506] pci 0000:09:02.0: [10b5:8603] type 01 class 0x060400
[ 0.497245] pci 0000:09:02.0: supports D1 D2
[ 0.497258] pci 0000:09:02.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.497525] pci 0000:09:02.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.507727] pci 0000:08:00.0: PCI bridge to [bus 09-0b]
[ 0.507766] pci 0000:08:00.0: bridge window [io 0x9000-0xafff]
[ 0.507819] pci 0000:08:00.0: bridge window [mem 0xd2100000-0xd22fffff 64bit pref]
[ 0.508049] pci 0000:0a:00.0: [10ec:8168] type 00 class 0x020000
[ 0.508192] pci 0000:0a:00.0: reg 0x10: [io 0xa000-0xa0ff]
[ 0.508312] pci 0000:0a:00.0: reg 0x18: [mem 0xd2204000-0xd2204fff 64bit pref]
[ 0.508405] pci 0000:0a:00.0: reg 0x20: [mem 0xd2200000-0xd2203fff 64bit pref]
[ 0.508861] pci 0000:0a:00.0: supports D1 D2
[ 0.508874] pci 0000:0a:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.509229] pci 0000:0a:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.519769] pci 0000:09:01.0: PCI bridge to [bus 0a]
[ 0.519810] pci 0000:09:01.0: bridge window [io 0xa000-0xafff]
[ 0.519862] pci 0000:09:01.0: bridge window [mem 0xd2200000-0xd22fffff 64bit pref]
[ 0.520102] pci 0000:0b:00.0: [10ec:8168] type 00 class 0x020000
[ 0.520244] pci 0000:0b:00.0: reg 0x10: [io 0x9000-0x90ff]
[ 0.520364] pci 0000:0b:00.0: reg 0x18: [mem 0xd2104000-0xd2104fff 64bit pref]
[ 0.520463] pci 0000:0b:00.0: reg 0x20: [mem 0xd2100000-0xd2103fff 64bit pref]
[ 0.520951] pci 0000:0b:00.0: supports D1 D2
[ 0.520963] pci 0000:0b:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.521315] pci 0000:0b:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.531848] pci 0000:09:02.0: PCI bridge to [bus 0b]
[ 0.531888] pci 0000:09:02.0: bridge window [io 0x9000-0x9fff]
[ 0.531941] pci 0000:09:02.0: bridge window [mem 0xd2100000-0xd21fffff 64bit pref]
[ 0.542689] pci 0000:06:05.0: PCI bridge to [bus 0c]
[ 0.542935] pci 0000:0d:00.0: [1912:0014] type 00 class 0x0c0330
[ 0.543147] pci 0000:0d:00.0: reg 0x10: [mem 0xec300000-0xec301fff 64bit]
[ 0.543927] pci 0000:0d:00.0: PME# supported from D0 D3hot D3cold
[ 0.544183] pci 0000:0d:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.554754] pci 0000:06:07.0: PCI bridge to [bus 0d]
[ 0.554799] pci 0000:06:07.0: bridge window [mem 0xec300000-0xec3fffff]
[ 0.555019] pci 0000:0e:00.0: [104c:823e] type 01 class 0x060400
[ 0.555299] pci 0000:0e:00.0: reg 0x14: [mem 0xec200000-0xec200fff]
[ 0.555756] pci 0000:0e:00.0: supports D1 D2
[ 0.555947] pci 0000:0e:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.566531] pci 0000:06:09.0: PCI bridge to [bus 0e-0f]
[ 0.566576] pci 0000:06:09.0: bridge window [mem 0xec100000-0xec2fffff]
[ 0.566783] pci_bus 0000:0f: extended config space not accessible
[ 0.566847] pci 0000:0f:00.0: [104c:823f] type 00 class 0x0c0010
[ 0.566943] pci 0000:0f:00.0: reg 0x10: [mem 0xec104000-0xec1047ff]
[ 0.566997] pci 0000:0f:00.0: reg 0x14: [mem 0xec100000-0xec103fff]
[ 0.567296] pci 0000:0f:00.0: supports D1 D2
[ 0.567309] pci 0000:0f:00.0: PME# supported from D0 D1 D2 D3hot
[ 0.567401] pci 0000:0f:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.578264] pci 0000:0e:00.0: PCI bridge to [bus 0f]
[ 0.578314] pci 0000:0e:00.0: bridge window [mem 0xec100000-0xec1fffff]
[ 0.578768] pci 0000:10:00.0: [8086:1533] type 00 class 0x020000
[ 0.579439] pci 0000:10:00.0: reg 0x10: [mem 0xec700000-0xec77ffff]
[ 0.580111] pci 0000:10:00.0: reg 0x18: [io 0xc000-0xc01f]
[ 0.580642] pci 0000:10:00.0: reg 0x1c: [mem 0xec780000-0xec783fff]
[ 0.582673] pci 0000:10:00.0: PME# supported from D0 D3hot D3cold
[ 0.583043] pci 0000:10:00.0: Failed to add - passthrough or MSI/MSI-X might fail!
[ 0.594203] pci 0000:00:1c.3: PCI bridge to [bus 10]
[ 0.594231] pci 0000:00:1c.3: bridge window [io 0xc000-0xcfff]
[ 0.594261] pci 0000:00:1c.3: bridge window [mem 0xec700000-0xec7fffff]
[ 0.594502] acpiphp: Slot [1] registered
...
```
Atm, I've no guests, and no explicit passthrough
```
xl list
Name ID Mem VCPUs State Time(s)
Domain-0 0 4015 4 r----- 3946.9
Xenstore 1 31 1 -b---- 0.0
```
afaict, so far, these "Failed to add - passthrough or MSI/MSI-X might fail!" aren't causing me any _noticeable_ problems.
ARE they an actual problem that can/should be fixed?
Or just noise that can be quieted down?
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