linux-kernel - Re: [PATCH v2] iommu/vt-d: avoid unnecessory panic if iommu init fail in tboot system

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Message-Id: <160570494826.3611054.1738553498825865068.b4-ty@kernel.org>
Date:   Wed, 18 Nov 2020 14:19:20 +0000
From:   Will Deacon <will@...nel.org>
To:     Zhenzhong Duan <zhenzhong.duan@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>,
        tboot-devel@...ts.sourceforge.net, mingo@...hat.com,
        x86@...nel.org, ning.sun@...el.com, dwmw2@...radead.org,
        iommu@...ts.linux-foundation.org, bp@...en8.de, tglx@...utronix.de
Subject: Re: [PATCH v2] iommu/vt-d: avoid unnecessory panic if iommu init fail in tboot system

On Tue, 10 Nov 2020 15:19:08 +0800, Zhenzhong Duan wrote:
> "intel_iommu=off" command line is used to disable iommu but iommu is force
> enabled in a tboot system for security reason.
> 
> However for better performance on high speed network device, a new option
> "intel_iommu=tboot_noforce" is introduced to disable the force on.
> 
> By default kernel should panic if iommu init fail in tboot for security
> reason, but it's unnecessory if we use "intel_iommu=tboot_noforce,off".
> 
> [...]

Applied to arm64 (for-next/iommu/fixes), thanks!

[1/1] iommu/vt-d: Avoid panic if iommu init fails in tboot system
      https://git.kernel.org/arm64/c/4d213e76a359

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev