Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Will Deacon <will@kernel.org>
To:     Lu Baolu <baolu.lu@linux.intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Ning Sun <ning.sun@intel.com>,
        Joerg Roedel <joro@8bytes.org>, Borislav Petkov <bp@alien8.de>
Cc:     catalin.marinas@arm.com, kernel-team@android.com,
        Will Deacon <will@kernel.org>, x86@kernel.org,
        tboot-devel@lists.sourceforge.net,
        Adrian Huang <ahuang12@lenovo.com>,
        iommu@lists.linux-foundation.org, Ashok Raj <ashok.raj@intel.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] x86/tboot: Don't disable swiotlb when iommu is forced on
Date:   Wed, 25 Nov 2020 14:05:15 +0000
Message-Id: <160630605367.4096500.10722779964348157570.b4-ty@kernel.org>
In-Reply-To: <20201125014124.4070776-1-baolu.lu@linux.intel.com>
References: <20201125014124.4070776-1-baolu.lu@linux.intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

On Wed, 25 Nov 2020 09:41:24 +0800, Lu Baolu wrote:
> After commit 327d5b2fee91c ("iommu/vt-d: Allow 32bit devices to uses DMA
> domain"), swiotbl could also be used for direct memory access if IOMMU
> is enabled but a device is configured to pass through the DMA translation.
> Keep swiotlb when IOMMU is forced on, otherwise, some devices won't work
> if "iommu=pt" kernel parameter is used.

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

[1/1] x86/tboot: Don't disable swiotlb when iommu is forced on
      https://git.kernel.org/arm64/c/e2be2a833ab5

Cheers,
-- 
Will

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