linux-kernel - Re: Kernel 6.7 regression doesn't boot if using AMD eGPU

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Message-ID: <6a83ebdc-0c9f-47d2-967b-d4ddea039da5@amd.com>
Date: Wed, 17 Apr 2024 14:27:03 +0530
From: Vasant Hegde <vashegde@....com>
To: Eric Wagner <ewagner12@...il.com>
Cc: Jason Gunthorpe <jgg@...pe.ca>, Robin Murphy <robin.murphy@....com>,
 Vasant Hegde <vasant.hegde@....com>, Joerg Roedel <joro@...tes.org>,
 Will Deacon <will@...nel.org>,
 Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
 iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: Kernel 6.7 regression doesn't boot if using AMD eGPU



On 4/17/2024 7:46 AM, Eric Wagner wrote:
> On Tue, Apr 16, 2024 at 6:53 AM Vasant Hegde <vashegde@....com> wrote:
>>
>> Hi Eric,
>>
>

../...

>>>
>>>
>>> As it booted ok with Robin's patch above, these changes to
>>> drivers/iommu/amd/iommu.c didn't seem to make a difference for me. I was testing
>>> with amd iommu v2 off in the kernel config and I also have TSME enabled in the
>>> BIOS if that matters.
>>
>> TMSE is transparent to OS. So its fine.
>>
>> -Vasant
>>
> Output of lspci -vvv and /proc/cmdline attached.

Thanks Eric.

-Vasant