Bug 200327

Summary:	iommu/vt-d: Clean up pasid quirk for pre-production devices breaks breaks GPU for i5 6600K
Product:	Drivers	Reporter:	Alexandre Peixoto Ferreira (alexandref75)
Component:	IOMMU	Assignee:	drivers_iommu
Status:	NEW ---
Severity:	blocking	CC:	candrews, sedragon, tom
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	4.18.0-rc1	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	Commit that provokes the error dmesg from my machine with the error

Description Alexandre Peixoto Ferreira 2018-06-28 12:41:41 UTC

Created attachment 276971 [details]
Commit that provokes the error

In my i5-6600K the kernel 4.18.0-rcX fails to boot the GPU with the error: GPU HANG: ecode 9:0:0xfffffffe, reason: hang on rcs0, bcs0, vcs0, vecs0, action: reset. I opened this bug at https://bugs.freedesktop.org/show_bug.cgi?id=107017 but by bisecting the kernel this was the commit responsible for the error: 813835028e9ae1f18cd11bb0ec591d0f0577d96a. I validated that by compiling the 4.18.0-rc2 kernel twice, with and without the patch applied and confirmed that the error is provoked by that commit.

I attached the dmesg for the error and the commit in question.

Comment 1 Alexandre Peixoto Ferreira 2018-06-28 12:44:35 UTC

Created attachment 276973 [details]
dmesg from my machine with the error