From e3c495c74bc008a5c3671bf3411bc7f5382fa58f Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 9 Nov 2011 12:31:15 +0100 Subject: [PATCH] iommu/amd: Add driver stub for AMD IOMMUv2 support Add a Kconfig option for the optional driver. Since it is optional it can be compiled as a module and will only be loaded when required by another driver. Signed-off-by: Joerg Roedel --- drivers/iommu/Kconfig | 8 ++++++++ drivers/iommu/Makefile | 1 + drivers/iommu/amd_iommu_v2.c | 36 ++++++++++++++++++++++++++++++++++++ 3 files changed, 45 insertions(+) create mode 100644 drivers/iommu/amd_iommu_v2.c diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 220dfc2..e608a36 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -60,6 +60,14 @@ config AMD_IOMMU_STATS information to userspace via debugfs. If unsure, say N. +config AMD_IOMMU_V2 + tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)" + depends on AMD_IOMMU && EXPERIMENTAL + ---help--- + This option enables support for the AMD IOMMUv2 features of the IOMMU + hardware. Select this option if you want to use devices that support + the the PCI PRI and PASID interface. + # Intel IOMMU support config DMAR_TABLE bool diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index 2f44487..0e36b49 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -1,6 +1,7 @@ obj-$(CONFIG_IOMMU_API) += iommu.o obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o +obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o obj-$(CONFIG_DMAR_TABLE) += dmar.o obj-$(CONFIG_INTEL_IOMMU) += iova.o intel-iommu.o obj-$(CONFIG_IRQ_REMAP) += intr_remapping.o diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c new file mode 100644 index 0000000..a19e07d --- /dev/null +++ b/drivers/iommu/amd_iommu_v2.c @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2010-2012 Advanced Micro Devices, Inc. + * Author: Joerg Roedel + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Joerg Roedel "); + +static int __init amd_iommu_v2_init(void) +{ + pr_info("AMD IOMMUv2 driver by Joerg Roedel "); + + return 0; +} + +static void __exit amd_iommu_v2_exit(void) +{ +} + +module_init(amd_iommu_v2_init); +module_exit(amd_iommu_v2_exit); -- 2.7.4