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iommu/amd: Add driver stub for AMD IOMMUv2 support

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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 <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2011-11-09 12:31:15 +01:00
parent 399be2f519
commit e3c495c74b
3 changed files with 45 additions and 0 deletions
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8
drivers/iommu/Kconfig
View file

@ -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

1
drivers/iommu/Makefile
View file

@ -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

36
drivers/iommu/amd_iommu_v2.c Normal file
View file

@ -0,0 +1,36 @@
/*
* Copyright (C) 2010-2012 Advanced Micro Devices, Inc.
* Author: Joerg Roedel <joerg.roedel@amd.com>
*
* 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 <linux/module.h>
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Joerg Roedel <joerg.roedel@amd.com>");
static int __init amd_iommu_v2_init(void)
{
pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>");
return 0;
}
static void __exit amd_iommu_v2_exit(void)
{
}
module_init(amd_iommu_v2_init);
module_exit(amd_iommu_v2_exit);