[Bug 98481] [Hawaii] Radeon kernel oops with vfio-pci

Fri Oct 28 18:54:03 UTC 2016

https://bugs.freedesktop.org/show_bug.cgi?id=98481

            Bug ID: 98481
           Summary: [Hawaii] Radeon kernel oops with vfio-pci
           Product: DRI
           Version: XOrg git
          Hardware: PowerPC
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: kb9vqf at pearsoncomputing.net

When DPM is enabled (dpm=1) and a Hawaii card (Radeon R9 290X) is passed to a
QEMU virtual machine via vfio, the guest kernel oopses with the following
output:

[ 1298.394440] [drm] Initialized drm 1.1.0 20060810
[ 1298.426253] [drm] radeon kernel modesetting enabled.
[ 1298.426284] checking generic (100a0000000 1d4c00) vs hw (10130000000
10000000)
[ 1298.427014] [drm] initializing kernel modesetting (HAWAII 0x1002:0x67B0
0x1002:0x0B00 0x00).
[ 1298.427030] [drm] register mmio base: 0xE0000000
[ 1298.427034] [drm] register mmio size: 262144
[ 1298.427038] [drm] doorbell mmio base: 0x40000000
[ 1298.427042] [drm] doorbell mmio size: 8388608
[ 1298.427082] [drm:radeon_device_init [radeon]] *ERROR* Unable to find PCI I/O
BAR
[ 1298.917871] [drm:radeon_atombios_init [radeon]] *ERROR* Unable to find PCI
I/O BAR; using MMIO for ATOM IIO
[ 1298.917880] ATOM BIOS: C67101
[ 1298.917971] radeon 0000:00:03.0: VRAM: 4096M 0x0000000000000000 -
0x00000000FFFFFFFF (4096M used)
[ 1298.917975] radeon 0000:00:03.0: GTT: 2048M 0x0000000100000000 -
0x000000017FFFFFFF
[ 1298.917978] [drm] Detected VRAM RAM=4096M, BAR=256M
[ 1298.917980] [drm] RAM width 512bits DDR
[ 1298.918085] [TTM] Zone  kernel: Available graphics memory: 33505984 kiB
[ 1298.918088] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[ 1298.918091] [TTM] Initializing pool allocator
[ 1298.918119] [drm] radeon: 4096M of VRAM memory ready
[ 1298.918122] [drm] radeon: 2048M of GTT memory ready.
[ 1298.918141] [drm] Loading hawaii Microcode
[ 1298.918151] [drm] Internal thermal controller with fan control
[ 1298.918206] Unable to handle kernel paging request for data at address
0x0000003c
[ 1298.918210] Faulting instruction address: 0xd00000000b3bff68
[ 1298.918214] Oops: Kernel access of bad area, sig: 11 [#1]
[ 1298.918216] SMP NR_CPUS=2048 NUMA pSeries
[ 1298.918220] Modules linked in: radeon(E+) ttm(E) drm_kms_helper(E) drm(E)
fuse(E) sg(E) snd_hda_codec_hdmi(E) evdev(E) snd_hda_intel(E) snd_hda_codec(E)
snd_hda_core(E) snd_hwdep(E) snd_pcm(E) snd_timer(E) snd(E) ghash_generic(E)
gf128mul(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E)
vmx_crypto(E) i2c_algo_bit(E) soundcore(E) ip_tables(E) x_tables(E) autofs4(E)
ext4(E) crc16(E) jbd2(E) crc32c_generic(E) fscrypto(E) ecb(E) mbcache(E)
sd_mod(E) sr_mod(E) cdrom(E) hid_generic(E) usbhid(E) hid(E) ibmvscsi(E)
scsi_transport_srp(E) virtio_net(E) virtio_pci(E) virtio_ring(E) virtio(E)
xhci_pci(E) xhci_hcd(E) usbcore(E) usb_common(E) [last unloaded: drm]
[ 1298.918268] CPU: 32 PID: 2466 Comm: modprobe Tainted: G        W   E  
4.8.0-trunk-powerpc64le #1 Debian 4.8.4-1~exp1
[ 1298.918273] task: c000000fea6b9b80 task.stack: c000000fe123c000
[ 1298.918276] NIP: d00000000b3bff68 LR: d00000000ba30c88 CTR: d00000000b3bff20
[ 1298.918280] REGS: c000000fe123ede0 TRAP: 0300   Tainted: G        W   E   
(4.8.0-trunk-powerpc64le Debian 4.8.4-1~exp1)
[ 1298.918284] MSR: 800000010280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]> 
CR: 84228428  XER: 20000000
[ 1298.918296] CFAR: c0000000000acea8 DAR: 000000000000003c DSISR: 40000000
SOFTE: 1
               GPR00: d00000000ba30c88 c000000fe123f060 d00000000b40af90
c000000fea554000
               GPR04: c000000fe123f140 0000000000000000 c000000fe2c6c000
c000000fff528050
               GPR08: 0000000ffea30000 c000000fee70e000 0000000000000000
d00000000ba58d80
               GPR12: d00000000b3bff20 c00000000fb92000 0000000020000000
c000000fe123fdec
               GPR16: c000000fe8f60000 c0000000008552c0 00000000000011d9
d00000000baf0000
               GPR20: d00000000baf0000 c00000000017de10 0000000000000000
0000000000000124
               GPR24: c000000fe2c6a000 c000000fe23df100 d00000000bab1640
d00000000bab1e48
               GPR28: c000000fe8f61b70 c000000fe8f61b70 0000000000000000
c000000fe123f140
[ 1298.918345] NIP [d00000000b3bff68] drm_pcie_get_speed_cap_mask+0x48/0x150
[drm]
[ 1298.918376] LR [d00000000ba30c88] ci_dpm_init+0xa8/0x13b0 [radeon]
[ 1298.918379] Call Trace:
[ 1298.918383] [c000000fe123f060] [c000000fe123f0e0] 0xc000000fe123f0e0
(unreliable)
[ 1298.918413] [c000000fe123f0e0] [d00000000ba30c88] ci_dpm_init+0xa8/0x13b0
[radeon]
[ 1298.918445] [c000000fe123f1f0] [d00000000b981a58] radeon_pm_init+0x628/0x910
[radeon]
[ 1298.918480] [c000000fe123f290] [d00000000b9e0f84] cik_init+0x324/0x790
[radeon]
[ 1298.918509] [c000000fe123f300] [d00000000b8f2c38]
radeon_device_init+0x5a8/0xc70 [radeon]
[ 1298.918539] [c000000fe123f390] [d00000000b8f6014]
radeon_driver_load_kms+0xc4/0x280 [radeon]
[ 1298.918548] [c000000fe123f410] [d00000000b3be15c]
drm_dev_register+0xfc/0x140 [drm]
[ 1298.918555] [c000000fe123f450] [d00000000b3c0798] drm_get_pci_dev+0xf8/0x220
[drm]
[ 1298.918574] [c000000fe123f4e0] [d00000000b8f0664]
radeon_pci_probe+0x134/0x1b0 [radeon]
[ 1298.918580] [c000000fe123f570] [c00000000050471c] local_pci_probe+0x6c/0x140
[ 1298.918583] [c000000fe123f600] [c0000000005055a8]
pci_device_probe+0x168/0x200
[ 1298.918588] [c000000fe123f660] [c0000000005b4900]
driver_probe_device+0x240/0x550
[ 1298.918591] [c000000fe123f6f0] [c0000000005b4d7c]
__driver_attach+0x16c/0x170
[ 1298.918595] [c000000fe123f770] [c0000000005b100c]
bus_for_each_dev+0x9c/0x110
[ 1298.918598] [c000000fe123f7c0] [c0000000005b3b5c] driver_attach+0x3c/0x60
[ 1298.918626] [c000000fe123f7f0] [c0000000005b33a8] bus_add_driver+0x308/0x390
[ 1298.918630] [c000000fe123f880] [c0000000005b5d1c] driver_register+0x9c/0x180
[ 1298.918633] [c000000fe123f8f0] [c0000000005038dc]
__pci_register_driver+0x6c/0x90
[ 1298.918640] [c000000fe123f930] [d00000000b3c0a24] drm_pci_init+0x164/0x1b0
[drm]
[ 1298.918659] [c000000fe123f9c0] [d00000000ba53440] radeon_init+0xc8/0xf8
[radeon]
[ 1298.918663] [c000000fe123fa30] [c00000000000b74c] do_one_initcall+0x6c/0x1d0
[ 1298.918667] [c000000fe123faf0] [c000000000822b50] do_init_module+0x94/0x254
[ 1298.918671] [c000000fe123fb80] [c0000000001821b0] load_module+0x2380/0x2b30
[ 1298.918674] [c000000fe123fd30] [c000000000182ca0]
SyS_finit_module+0xf0/0x170
[ 1298.918678] [c000000fe123fe30] [c000000000009560] system_call+0x38/0x108
[ 1298.918680] Instruction dump:
[ 1298.918682] f821ff81 7c7e1b78 7c9f2378 48000008 e8410018 39200000 913f0000
e93e01e8
[ 1298.918688] 2fa90000 41de0044 e9290010 ebc90038 <a13e003c> 2b891106 419e0030
2b891166
[ 1298.918696] ---[ end trace 6c565dbe73743fb5 ]---

Setting dpm=0 allows the radeon driver to load normally and the card functions
as expected under Xorg.

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