From: Jason Gunthorpe <jgg@nvidia.com>
To: "Borah, Chaitanya Kumar" <chaitanya.kumar.borah@intel.com>
Cc: "intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"intel-xe@lists.freedesktop.org" <intel-xe@lists.freedesktop.org>,
Lucas De Marchi <lucas.demarchi@intel.com>,
"Kurmi, Suresh Kumar" <suresh.kumar.kurmi@intel.com>,
"Saarinen, Jani" <jani.saarinen@intel.com>,
matthew.auld@intel.com, baolu.lu@linux.intel.com,
iommu@lists.linux.dev
Subject: Re: REGRESSION on linux-next (next-20251106)
Date: Tue, 18 Nov 2025 12:13:41 -0400 [thread overview]
Message-ID: <20251118161341.GC90703@nvidia.com> (raw)
In-Reply-To: <a79fe616-52c7-4fa5-906c-382b5ff2226c@intel.com>
> Also, the tests fail consistently and are not sporadic.
From these logs I see the below fragment, noting this:
gem_exec_gttfil-1010 [004] .N... 50.126420: map: IOMMU: iova=0x00003fffffc00000 - 0x0000400000000000 paddr=0x00000001b9400000 size=4194304
^^^^^^^^^^^^^^^^^^^
Which is the high IOVA.. It has bit 45 set. I fed this mapping into
the kunit and it does map successfully.
It is not high enough to get into anything special about sign extend,
the driver sets:
if (cap_fl5lp_support(iommu->cap))
cfg.common.hw_max_vasz_lg2 = 57;
else
cfg.common.hw_max_vasz_lg2 = 48;
Maybe this code is wrong? Baolu what did you get for this log:
[ 50.126166] i915 0000:00:02.0: Using 46-bit DMA addresses
In your force second stage test? Is it 46? Second stage uses different
code to compute vasz_lg2 and is sensitive to magw:
if (mgaw >= 48 && (sagaw & BIT(3)))
return min(57, mgaw);
else if (mgaw >= 39 && (sagaw & BIT(2)))
return min(48, mgaw);
else if (mgaw >= 30 && (sagaw & BIT(1)))
return min(39, mgaw);
Maybe this is the issue?
I don't know how the GPU works, is that the command buffer that is
getting 'request 6000'
[ 50.128337] i915 0000:00:02.0: [drm] *ERROR* GT0: GUC: CT: Failed to process request 6000 (-EOPNOTSUPP)
?
Chaitanya, can you collect these two log files from the commit that
works please? Lets see if it uses the same IOVA and same 46 bit limit?
Thanks,
Jason
[ 49.064561] [IGT] gem_exec_gttfill: starting subtest basic
[..]
<idle>-0 [010] ..s1. 50.124236: map: IOMMU: iova=0x00000000ffefa000 - 0x00000000ffefb000 paddr=0x0000000100271000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.124414: map: IOMMU: iova=0x00000000433fc000 - 0x00000000433fd000 paddr=0x0000000128532000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.124598: map: IOMMU: iova=0x000000002ebfc000 - 0x000000002ebfd000 paddr=0x0000000128533000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.124782: map: IOMMU: iova=0x00000000443f9000 - 0x00000000443fa000 paddr=0x0000000128534000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.124966: map: IOMMU: iova=0x000000002dbf9000 - 0x000000002dbfa000 paddr=0x0000000128535000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.125149: map: IOMMU: iova=0x000000002cbfd000 - 0x000000002cbfe000 paddr=0x0000000128536000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.125347: map: IOMMU: iova=0x00000000413fd000 - 0x00000000413fe000 paddr=0x0000000128537000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.125538: map: IOMMU: iova=0x000000001fbfe000 - 0x000000001fbff000 paddr=0x0000000128538000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.125580: i915_request_retire.part.0: 0000:00:02.0 rcs0: fence 18:1034, current 1036
gem_exec_gttfil-1010 [004] ..... 50.125590: __i915_request_commit: 0000:00:02.0 rcs0: fence 18:1038, current 1036
gem_exec_gttfil-1010 [004] D..1. 50.125592: __i915_request_submit: 0000:00:02.0 rcs0: fence 18:1038, current 1036
kworker/u64:1-138 [002] ..... 50.125600: unmap: IOMMU: iova=0x000000001fbfe000 - 0x000000001fbff000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.125627: unmap: IOMMU: iova=0x00000000413fd000 - 0x00000000413fe000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.125643: unmap: IOMMU: iova=0x000000002cbfd000 - 0x000000002cbfe000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.125659: unmap: IOMMU: iova=0x000000002dbf9000 - 0x000000002dbfa000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.125675: unmap: IOMMU: iova=0x00000000443f9000 - 0x00000000443fa000 size=4096 unmapped_size=4096
[ 50.126166] i915 0000:00:02.0: Using 46-bit DMA addresses
gem_exec_gttfil-1010 [004] .N... 50.126420: map: IOMMU: iova=0x00003fffffc00000 - 0x0000400000000000 paddr=0x00000001b9400000 size=4194304
gem_exec_gttfil-1010 [004] ..... 50.126701: map: IOMMU: iova=0x000000001fbfd000 - 0x000000001fbfe000 paddr=0x0000000128539000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.126892: map: IOMMU: iova=0x000000001fbfc000 - 0x000000001fbfd000 paddr=0x000000012853a000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.127083: map: IOMMU: iova=0x000000002d3fb000 - 0x000000002d3fc000 paddr=0x000000012853b000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.127271: map: IOMMU: iova=0x0000000041bfc000 - 0x0000000041bfd000 paddr=0x000000012853c000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.127467: map: IOMMU: iova=0x000000001dbfc000 - 0x000000001dbfd000 paddr=0x000000012853d000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.127653: map: IOMMU: iova=0x000000001f3fa000 - 0x000000001f3fb000 paddr=0x000000012853e000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.127838: map: IOMMU: iova=0x000000001f3f9000 - 0x000000001f3fa000 paddr=0x000000012853f000 size=4096
gem_exec_gttfil-1010 [004] ..... 50.127877: i915_request_retire.part.0: 0000:00:02.0 rcs0: fence 18:1036, current 1038
gem_exec_gttfil-1010 [004] ..... 50.127887: __i915_request_commit: 0000:00:02.0 rcs0: fence 18:1040, current 1038
gem_exec_gttfil-1010 [004] D..1. 50.127890: __i915_request_submit: 0000:00:02.0 rcs0: fence 18:1040, current 1038
kworker/u64:1-138 [002] ..... 50.127966: unmap: IOMMU: iova=0x000000001f3f9000 - 0x000000001f3fa000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.127990: unmap: IOMMU: iova=0x000000001f3fa000 - 0x000000001f3fb000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.128006: unmap: IOMMU: iova=0x000000001dbfc000 - 0x000000001dbfd000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.128024: unmap: IOMMU: iova=0x0000000041bfc000 - 0x0000000041bfd000 size=4096 unmapped_size=4096
kworker/u64:1-138 [002] ..... 50.128042: unmap: IOMMU: iova=0x000000002d3fb000 - 0x000000002d3fc000 size=4096 unmapped_size=4096
[ 50.128337] i915 0000:00:02.0: [drm] *ERROR* GT0: GUC: CT: Failed to process request 6000 (-EOPNOTSUPP)
gem_exec_gttfil-1010 [004] ..... 50.128561: map: IOMMU: iova=0x00003fffff800000 - 0x00003fffffc00000 paddr=0x00000001b9800000 size=4194304
next prev parent reply other threads:[~2025-11-18 16:13 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-10 6:36 REGRESSION on linux-next (next-20251106) Borah, Chaitanya Kumar
2025-11-12 22:32 ` Jason Gunthorpe
2025-11-13 2:00 ` Tian, Kevin
2025-11-17 15:24 ` Jason Gunthorpe
2025-11-17 12:54 ` Baolu Lu
2025-11-17 15:22 ` Jason Gunthorpe
2025-11-18 1:29 ` Jason Gunthorpe
2025-11-18 4:04 ` Tian, Kevin
2025-11-18 6:19 ` Baolu Lu
2025-11-18 6:23 ` Baolu Lu
2025-11-18 7:47 ` Tian, Kevin
2025-11-18 11:29 ` Baolu Lu
2025-11-18 12:35 ` Jason Gunthorpe
2025-11-19 7:25 ` Baolu Lu
2025-11-18 10:30 ` Baolu Lu
2025-11-18 15:16 ` Borah, Chaitanya Kumar
2025-11-18 16:13 ` Jason Gunthorpe [this message]
2025-11-19 7:40 ` Borah, Chaitanya Kumar
2025-11-19 9:31 ` Tian, Kevin
2025-11-19 18:51 ` Jason Gunthorpe
2025-11-19 23:56 ` Tian, Kevin
2025-11-20 2:18 ` Jason Gunthorpe
2025-11-20 2:24 ` Baolu Lu
2025-11-20 7:27 ` Baolu Lu
2025-11-20 0:19 ` Tian, Kevin
2025-11-19 9:29 ` Baolu Lu
2025-11-18 12:42 ` ✗ Fi.CI.BUILD: failure for " Patchwork
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