On 2021.07.21 13:10:49 +0200, Christoph Hellwig wrote: > Hi all, > > I'm trying to test some changes for the gvt code, but even with a baseline > 5.14-rc2 host and guest the 915 driver does not seem overly happy: > I think we also got bug report on those display related warnings, should be some issue with our virtual display model that doesn't work nicely with more i915 display pipe/port check or exercises have been added...But I believe you should still get virtual framebuffer up and show, right? > [ 5.693099] i915 0000:00:04.0: [drm] Virtual GPU for Intel GVT-g detected. > [ 5.694841] i915 0000:00:04.0: [drm] VT-d active for gfx access > [ 5.696411] i915 0000:00:04.0: [drm] iGVT-g active, disabling use of stolen memory > [ 5.711317] i915 0000:00:04.0: BAR 6: can't assign [??? 0x00000000 flags 0x20000000] (bogus alignm) > [ 5.712847] i915 0000:00:04.0: [drm] Failed to find VBIOS tables (VBT) > [ 5.714343] i915 0000:00:04.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=iom > [ 5.716466] i915 0000:00:04.0: Direct firmware load for i915/kbl_dmc_ver1_04.bin failed with error2 > [ 5.718021] i915 0000:00:04.0: [drm] Failed to load DMC firmware i915/kbl_dmc_ver1_04.bin. Disabli. > [ 5.719914] i915 0000:00:04.0: [drm] DMC firmware homepage: https://git.kernel.org/pub/scm/linux/k5 > [ 5.733269] i915 0000:00:04.0: [drm] failed to retrieve link info, disabling eDP > [ 5.735841] i915 0000:00:04.0: [drm] *ERROR* crtc 51: Can't calculate constants, dotclock = 0! > [ 5.737354] ------------[ cut here ]------------ > [ 5.738141] i915 0000:00:04.0: drm_WARN_ON_ONCE(drm_drv_uses_atomic_modeset(dev)) > [ 5.738165] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_vblank.c:728 drm_crtc_vblank_helper_get_0 > [ 5.738745] Modules linked in: > [ 5.738745] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.14.0-rc2+ #22 > [ 5.738745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 > [ 5.738745] RIP: 0010:drm_crtc_vblank_helper_get_vblank_timestamp_internal+0x335/0x350 > [ 5.738745] Code: 4c 8b 6f 50 4d 85 ed 75 03 4c 8b 2f e8 34 10 26 00 48 c7 c1 20 54 0d 83 4c 89 ea0 > [ 5.738745] RSP: 0000:ffffc90000013a90 EFLAGS: 00010086 > [ 5.738745] RAX: 0000000000000000 RBX: ffffffff81c3c5b0 RCX: 0000000000000000 > [ 5.738745] RDX: 0000000000000003 RSI: 00000000fffeffff RDI: 00000000ffffffff > [ 5.738745] RBP: ffffc90000013b00 R08: ffffffff83bb3e28 R09: 0000000000000003 > [ 5.738745] R10: ffffffff834b3e40 R11: 3fffffffffffffff R12: 0000000000000000 > [ 5.738745] R13: ffff888100e982f0 R14: ffff8881053f0340 R15: ffff888105592178 > [ 5.738745] FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 > [ 5.738745] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 5.738745] CR2: 0000000000000000 CR3: 0000000003462000 CR4: 00000000000006f0 > [ 5.738745] Call Trace: > [ 5.738745] drm_get_last_vbltimestamp+0xa5/0xb0 > [ 5.738745] drm_reset_vblank_timestamp+0x56/0xc0 > [ 5.738745] drm_crtc_vblank_on+0x81/0x140 > [ 5.738745] intel_crtc_vblank_on+0x2b/0xe0 > [ 5.738745] intel_modeset_setup_hw_state+0xa9c/0x1ab0 > [ 5.738745] ? ww_mutex_lock+0x2b/0x90 > [ 5.738745] intel_modeset_init_nogem+0x3c5/0x1310 > [ 5.738745] ? intel_irq_postinstall+0x1aa/0x520 > [ 5.738745] i915_driver_probe+0x695/0xd30 > [ 5.738745] ? _raw_spin_unlock_irqrestore+0x33/0x50 > [ 5.738745] pci_device_probe+0xcd/0x140 > [ 5.738745] really_probe.part.0+0x99/0x270 > [ 5.738745] __driver_probe_device+0x8b/0x120 > [ 5.738745] driver_probe_device+0x19/0x90 > [ 5.738745] __driver_attach+0x79/0x120 > [ 5.738745] ? __device_attach_driver+0x90/0x90 > [ 5.738745] bus_for_each_dev+0x78/0xc0 > [ 5.738745] bus_add_driver+0x109/0x1b0 > [ 5.738745] driver_register+0x86/0xd0 > [ 5.738745] ? ttm_init+0x18/0x18 > [ 5.738745] i915_init+0x58/0x72 > [ 5.738745] do_one_initcall+0x56/0x2e0 > [ 5.738745] ? rcu_read_lock_sched_held+0x3a/0x70 > [ 5.738745] kernel_init_freeable+0x186/0x1ce > [ 5.738745] ? rest_init+0x250/0x250 > [ 5.738745] kernel_init+0x11/0x110 > [ 5.738745] ret_from_fork+0x22/0x30 > [ 5.738745] irq event stamp: 8200428 > [ 5.738745] hardirqs last enabled at (8200427): [<ffffffff825d38e8>] _raw_spin_unlock_irqrestore+0 > [ 5.738745] hardirqs last disabled at (8200428): [<ffffffff825d3671>] _raw_spin_lock_irq+0x41/0x50 > [ 5.738745] softirqs last enabled at (8199086): [<ffffffff8113f3c8>] irq_exit_rcu+0x108/0x140 > [ 5.738745] softirqs last disabled at (8199079): [<ffffffff8113f3c8>] irq_exit_rcu+0x108/0x140 > [ 5.738745] ---[ end trace e99e0812b8ee9c5d ]--- > [ 5.786472] i915 0000:00:04.0: [drm] VGT ballooning configuration: > [ 5.787531] i915 0000:00:04.0: [drm] Mappable graphic memory: base 0x31c7000 size 65536KiB > [ 5.788865] i915 0000:00:04.0: [drm] Unmappable graphic memory: base 0xe7ef8000 size 393216KiB > [ 5.790270] i915 0000:00:04.0: [drm] balloon space: range [ 0x10000000 - 0xe7ef8000 ] 3537888 KiB. > [ 5.791807] i915 0000:00:04.0: [drm] balloon space: range [ 0xffef8000 - 0x100000000 ] 1056 KiB. > [ 5.793241] i915 0000:00:04.0: [drm] balloon space: range [ 0x0 - 0x31c7000 ] 50972 KiB. > [ 5.794565] i915 0000:00:04.0: [drm] balloon space: range [ 0x71c7000 - 0x10000000 ] 145636 KiB. > [ 5.796028] i915 0000:00:04.0: [drm] VGT balloon successfully > [ 6.670284] ------------[ cut here ]------------ > [ 6.671155] crtc active state doesn't match with hw state (expected 0, found 1) > [ 6.672376] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/i915/display/intel_display.c:8964 intel_atom0 > [ 6.674232] Modules linked in: > [ 6.674767] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 5.14.0-rc2+ #22 > [ 6.676039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 > [ 6.677402] RIP: 0010:intel_atomic_commit_tail+0x13c9/0x1410 > [ 6.678335] Code: 0f 0b 0f b6 34 24 89 f1 e9 8d fc ff ff e8 7f 19 7f 00 0f 0b e9 30 fd ff ff e8 739 > [ 6.681400] RSP: 0000:ffffc90000013b20 EFLAGS: 00010282 > [ 6.682264] RAX: 0000000000000000 RBX: ffff888105593800 RCX: 0000000000000000 > [ 6.683453] RDX: 0000000000000001 RSI: ffffffff831a6e3f RDI: 00000000ffffffff > [ 6.684623] RBP: ffff888104ab2000 R08: 0000000000000001 R09: 0000000000000001 > [ 6.685782] R10: 00000000ffff0000 R11: 3fffffffffffffff R12: ffff888104baa000 > [ 6.686972] R13: ffff888104e5a000 R14: ffff8881053f0000 R15: ffff8881053f0000 > [ 6.688147] FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 > [ 6.689475] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 6.690421] CR2: 0000000000000000 CR3: 0000000003462000 CR4: 00000000000006f0 > [ 6.691611] Call Trace: > [ 6.692038] intel_atomic_commit+0x32d/0x3b0 > [ 6.692751] intel_initial_commit+0x156/0x1e0 > [ 6.693488] intel_modeset_init+0x19/0x80 > [ 6.694156] i915_driver_probe+0x6bb/0xd30 > [ 6.694860] ? _raw_spin_unlock_irqrestore+0x33/0x50 > [ 6.695690] pci_device_probe+0xcd/0x140 > [ 6.696346] really_probe.part.0+0x99/0x270 > [ 6.697041] __driver_probe_device+0x8b/0x120 > [ 6.697767] driver_probe_device+0x19/0x90 > [ 6.698459] __driver_attach+0x79/0x120 > [ 6.699120] ? __device_attach_driver+0x90/0x90 > [ 6.699878] bus_for_each_dev+0x78/0xc0 > [ 6.700522] bus_add_driver+0x109/0x1b0 > [ 6.701163] driver_register+0x86/0xd0 > [ 6.701786] ? ttm_init+0x18/0x18 > [ 6.702342] i915_init+0x58/0x72 > [ 6.702906] do_one_initcall+0x56/0x2e0 > [ 6.703553] ? rcu_read_lock_sched_held+0x3a/0x70 > [ 6.704335] kernel_init_freeable+0x186/0x1ce > [ 6.705057] ? rest_init+0x250/0x250 > [ 6.705660] kernel_init+0x11/0x110 > [ 6.706250] ret_from_fork+0x22/0x30 > [ 6.706893] irq event stamp: 8204007 > [ 6.707520] hardirqs last enabled at (8204015): [<ffffffff811acba3>] console_unlock+0x323/0x560 > [ 6.708967] hardirqs last disabled at (8204022): [<ffffffff811acc50>] console_unlock+0x3d0/0x560 > [ 6.710409] softirqs last enabled at (8203694): [<ffffffff8113f3c8>] irq_exit_rcu+0x108/0x140 > [ 6.711894] softirqs last disabled at (8203689): [<ffffffff8113f3c8>] irq_exit_rcu+0x108/0x140 > [ 6.713302] ---[ end trace e99e0812b8ee9c5e ]--- > [ 6.719970] [drm] Initialized i915 1.6.0 20201103 for 0000:00:04.0 on minor 0 >
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