From: Baolu Lu <baolu.lu@linux.intel.com>
To: "Tian, Kevin" <kevin.tian@intel.com>,
Jason Gunthorpe <jgg@nvidia.com>,
"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>,
"De Marchi, Lucas" <lucas.demarchi@intel.com>,
"Kurmi, Suresh Kumar" <suresh.kumar.kurmi@intel.com>,
"Saarinen, Jani" <jani.saarinen@intel.com>,
"Auld, Matthew" <matthew.auld@intel.com>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>
Subject: Re: REGRESSION on linux-next (next-20251106)
Date: Tue, 18 Nov 2025 14:23:38 +0800 [thread overview]
Message-ID: <5ec170fa-d5e1-473d-a7b8-8d1737efb241@linux.intel.com> (raw)
In-Reply-To: <BN9PR11MB5276C5F6D952CFFEC7CBF0D68CD6A@BN9PR11MB5276.namprd11.prod.outlook.com>
On 11/18/25 12:04, Tian, Kevin wrote:
>> 46 bits is not particularly big... Hmm, I wonder if we have some issue
>> with the sign-extend? iommupt does that properly and IIRC the old code
>> did not. Which of the page table formats is this using second stage or
>> first stage?
> Assume it's first stage for kernel IOVA, if available in hw
It's the first stage (x86_64 fmt) according to the PASID entry setup:
IOMMU dmar0: Root Table Address: 0x105a82000
B.D.F Root_entry Context_entry PASID PASID_table_entry
00:02.0 0x0000000000000000:0x0000000105a85001
0x0000000000000000:0x0000000105a84405 0
0x0000000105a86000:0x0000000000000002:0x0000000000000049
Thanks,
baolu
next prev parent reply other threads:[~2025-11-18 6:27 UTC|newest]
Thread overview: 25+ 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 [this message]
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
2025-11-19 9:29 ` Baolu Lu
[not found] ` <0c3cd494-e42a-4607-896c-4c341f90c270@intel.com>
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
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