Commit 0c271f90 authored by Jean-Philippe Brucker's avatar Jean-Philippe Brucker Committed by Zheng Zengkai
Browse files

Documentation: Generalize the "pci=noats" boot parameter 

maillist inclusion
category: feature
bugzilla: 51855
CVE: NA

Reference: https://jpbrucker.net/git/linux/commit/?h=sva/2021-03-01&id=25fe4fbaddf2401ab711d800e89452f41930f98b



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The "pci=noats" kernel parameter disables PCIe ATS globally, and affects
any ATS-capable IOMMU driver. So rather than adding Arm SMMUv3, which
recently gained ATS support, to the list of relevant build options,
simplify the noats description.

Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: default avatarLijun Fang <fanglijun3@huawei.com>
Reviewed-by: default avatarWeilong Chen <chenweilong@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 814b58e1

Documentation/admin-guide/kernel-parameters.txt

+2 −2
Original line number Diff line number Diff line
@@ -3813,8 +3813,8 @@ 
				on: Turn realloc on

		realloc		same as realloc=on

		noari		do not use PCIe ARI.

		noats		[PCIE, Intel-IOMMU, AMD-IOMMU]

				do not use PCIe ATS (and IOMMU device IOTLB).

		noats		[PCIE] Do not use PCIe ATS (and IOMMU device

				IOTLB).

		pcie_scan_all	Scan all possible PCIe devices.  Otherwise we

				only look for one device below a PCIe downstream

				port.