linux-kernel - Re: [GIT PULL] PCIe Link Encryption and Device Authentication

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Message-ID: <CAHk-=wh9dTX5eg0+NruSDbOCT_tafsO=a8m3cbhxFBvt-21bxQ@mail.gmail.com>
Date: Sat, 6 Dec 2025 11:21:15 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: dan.j.williams@...el.com, Alexey Kardashevskiy <aik@....com>, 
	Joerg Roedel <joerg.roedel@....com>, Vasant Hegde <vasant.hegde@....com>, 
	Tom Lendacky <thomas.lendacky@....com>
Cc: linux-coco@...ts.linux.dev, linux-pci@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Xu Yilun <yilun.xu@...ux.intel.com>, 
	"Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>
Subject: Re: [GIT PULL] PCIe Link Encryption and Device Authentication

On Fri, 5 Dec 2025 at 19:08, <dan.j.williams@...el.com> wrote:
>
> Alexey Kardashevskiy (4):
>       iommu/amd: Report SEV-TIO support

Bah, I've merged this and pushed things out, because my allmodconfig
build was fine.

But more testing shows that this is broken.

The amd_iommu_sev_tio_supported() function is only defined for
CONFIG_KVM_AMD_SEV, but the <linux/amd-iommu.h> header put it inside
the CONFIG_AMD_IOMMU config option block.

So if you have AMD_IOMMU enabled without KVM_AMD_SEV you end up with a
broken build:

   ERROR: modpost: "amd_iommu_sev_tio_supported"
[drivers/crypto/ccp/ccp.ko] undefined!
   make[2]: *** [scripts/Makefile.modpost:147: Module.symvers] Error 1

I've pushed out a minimal fix that seems to work for me.

Please check - and be more careful. This is _not_ some kind of odd config.

              Linus