Bug 202723
| Summary: | DMAR: DRHD: handling fault status reg 2 | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | marcomom (marcomommom) |
| Component: | IOMMU | Assignee: | drivers_iommu |
| Status: | NEW --- | ||
| Severity: | normal | CC: | pmenzel+bugzilla.kernel.org |
| Priority: | P1 | ||
| Hardware: | Intel | ||
| OS: | Linux | ||
| Kernel Version: | 4.20 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Attachments: | .config | ||
Well still happens with recent kernel 5.1.16. Debian enabled CONFIG_INTEL_IOMMU_DEFAULT_ON=y in Linux 5.2.9 [1], and now I am having problems on the Dell Latitude E7250. ``` [ 41.975448] DMAR: DRHD: handling fault status reg 3 [ 41.975456] DMAR: [DMA Write] Request device [00:02.0] fault addr fffec1003000 [fault reason 23] Unknown [ 41.987006] DMAR: DRHD: handling fault status reg 3 [ 41.987013] DMAR: [DMA Write] Request device [00:02.0] fault addr fffec1006000 [fault reason 23] Unknown [ 42.157270] DMAR: DRHD: handling fault status reg 3 [ 42.157275] DMAR: [DMA Write] Request device [00:02.0] fault addr fffec1003000 [fault reason 23] Unknown [ 42.886618] DMAR: DRHD: handling fault status reg 3 [ 47.549330] dmar_fault: 11 callbacks suppressed [ 47.549333] DMAR: DRHD: handling fault status reg 3 [ 47.549343] DMAR: [DMA Write] Request device [00:02.0] fault addr fffec1006000 [fault reason 23] Unknown [ 48.699784] DMAR: DRHD: handling fault status reg 3 [ 48.699799] DMAR: [DMA Write] Request device [00:02.0] fault addr fffec1003000 [fault reason 23] Unknown [ 48.880717] DMAR: DRHD: handling fault status reg 3 [ 48.880733] DMAR: [DMA Write] Request device [00:02.0] fault addr fffec1006000 [fault reason 23] Unknown [ 50.033196] DMAR: DRHD: handling fault status reg 3 [ 57.985477] i915 0000:00:02.0: GPU HANG: ecode 8:1:0xfffffffe, in gnome-shell [938], hang on rcs0 [ 57.985479] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. [ 57.985479] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [ 57.985479] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue. [ 57.985480] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. [ 57.985480] [drm] GPU crash dump saved to /sys/class/drm/card0/error [ 57.986489] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0 ``` Booting with `intel_iommu=igfx_off` fixes this [2]. This seems to be a common problem [3][4]. [1]: https://bugs.debian.org/934309 [2]: https://bugs.kali.org/view.php?id=5644 [3]: https://bbs.archlinux.org/viewtopic.php?id=230362 [4]: https://bugs.freedesktop.org/show_bug.cgi?id=103076 As the other tickets are convoluted, I created a new issue at https://bugs.freedesktop.org [1]. [1]: https://bugs.freedesktop.org/show_bug.cgi?id=111451 |
Created attachment 281459 [details] .config Hi, Running a Intel(R) Core(TM) i7-4790K CPU with intel_iommu=on in order to run virtual machines with a nvidia GPU passthrough. Since kernel 4.20, dmesg is flooded with DMAR: DRHD: handling fault status reg 2 [38612.128348] DMAR: [DMA Write] Request device [00:02.0] fault addr a3f5c000 [fault reason 05] PTE Write access is not set [38640.215367] DMAR: DRHD: handling fault status reg 2 [38640.215378] DMAR: [DMA Write] Request device [00:02.0] fault addr b2dfc000 [fault reason 05] PTE Write access is not set [38699.725691] DMAR: DRHD: handling fault status reg 2 [38699.725695] DMAR: [DMA Write] Request device [00:02.0] fault addr a3f5c000 [fault reason 05] PTE Write access is not set [38731.439607] DMAR: DRHD: handling fault status reg 2 This is a regression as it doesn't happen with kernel 4.19. It seems to come up when using video players such as vlc and kodi. # lspci 00:00.0 Host bridge: Intel Corporation 4th Gen Core Processor DRAM Controller (rev 06) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06) 00:01.2 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x4 Controller (rev 06) 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06) 00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06) 00:14.0 USB controller: Intel Corporation 9 Series Chipset Family USB xHCI Controller 00:16.0 Communication controller: Intel Corporation 9 Series Chipset Family ME Interface #1 00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-V 00:1a.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #2 00:1b.0 Audio device: Intel Corporation 9 Series Chipset Family HD Audio Controller 00:1c.0 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 1 (rev d0) 00:1c.2 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 3 (rev d0) 00:1c.3 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 4 (rev d0) 00:1c.4 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 5 (rev d0) 00:1c.6 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 7 (rev d0) 00:1d.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #1 00:1f.0 ISA bridge: Intel Corporation Z97 Chipset LPC Controller 00:1f.2 SATA controller: Intel Corporation 9 Series Chipset Family SATA Controller [AHCI Mode] 00:1f.3 SMBus: Intel Corporation 9 Series Chipset Family SMBus Controller 01:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 1060 6GB] (rev a1) 01:00.1 Audio device: NVIDIA Corporation GP106 High Definition Audio Controller (rev a1) 02:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 03) 04:00.0 Ethernet controller: Qualcomm Atheros Killer E220x Gigabit Ethernet Controller (rev 10) 05:00.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 41) 07:00.0 RAID bus controller: Silicon Image, Inc. SiI 3132 Serial ATA Raid II Controller (rev 01) 08:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller (rev 12) It doesn't seem to be totally blocking the system, however slowdowns and stuttering occurs. I have tried every 4.20 releases until this 4.20.12-4. Only reverting to 4.19 fixes the problem. Feel free to ask any additional information. Thank you