From bcb71abe7d4c5a0d0368c67da0a7def4fc73497a Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Fri, 21 Oct 2011 15:56:24 -0400 Subject: iommu: Add option to group multi-function devices The option iommu=group_mf indicates the that the iommu driver should expose all functions of a multi-function PCI device as the same iommu_device_group. This is useful for disallowing individual functions being exposed as independent devices to userspace as there are often hidden dependencies. Virtual functions are not affected by this option. Signed-off-by: Alex Williamson Signed-off-by: Joerg Roedel --- Documentation/kernel-parameters.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'Documentation/kernel-parameters.txt') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a0c5c5f..e1b6e44 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1059,7 +1059,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. nomerge forcesac soft - pt [x86, IA-64] + pt [x86, IA-64] + group_mf [x86, IA-64] + io7= [HW] IO7 for Marvel based alpha systems See comment before marvel_specify_io7 in -- cgit v1.1 From 5abcdba4fa535c29f736455e37229ee97e0e7f5d Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 1 Dec 2011 15:49:45 +0100 Subject: iommu/amd: Put IOMMUv2 capable devices in pt_domain If the device starts to use IOMMUv2 features the dma handles need to stay valid. The only sane way to do this is to use a identity mapping for the device and not translate it by the iommu. This is implemented with this patch. Since this lifts the device-isolation there is also a new kernel parameter which allows to disable that feature. Signed-off-by: Joerg Roedel --- Documentation/kernel-parameters.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/kernel-parameters.txt') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 81c287f..22152ed 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -329,6 +329,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. is a lot of faster off - do not initialize any AMD IOMMU found in the system + force_isolation - Force device isolation for all + devices. The IOMMU driver is not + allowed anymore to lift isolation + requirements as needed. This option + does not override iommu=pt amijoy.map= [HW,JOY] Amiga joystick support Map of devices attached to JOY0DAT and JOY1DAT -- cgit v1.1