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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2021-08-18 16:48:47 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-08-19 11:41:08 +0300 |
| commit | 792fb43ce2c98878f1539c1d3fdecc1d7a7d78fd (patch) | |
| tree | f2a9e8aa1379f84db4d2bb636e5f591529c166d6 /drivers/iommu/intel/Kconfig | |
| parent | 01dac2d9d2364d2a68b37cc1381947ca53413b51 (diff) | |
| download | linux-792fb43ce2c98878f1539c1d3fdecc1d7a7d78fd.tar.xz | |
iommu/vt-d: Enable Intel IOMMU scalable mode by default
The commit 8950dcd83ae7d ("iommu/vt-d: Leave scalable mode default off")
leaves the scalable mode default off and end users could turn it on with
"intel_iommu=sm_on". Using the Intel IOMMU scalable mode for kernel DMA,
user-level device access and Shared Virtual Address have been enabled.
This enables the scalable mode by default if the hardware advertises the
support and adds kernel options of "intel_iommu=sm_on/sm_off" for end
users to configure it through the kernel parameters.
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Suggested-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20210720013856.4143880-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20210818134852.1847070-5-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel/Kconfig')
| -rw-r--r-- | drivers/iommu/intel/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iommu/intel/Kconfig b/drivers/iommu/intel/Kconfig index c1a92c3049d0..0ddb77115be7 100644 --- a/drivers/iommu/intel/Kconfig +++ b/drivers/iommu/intel/Kconfig @@ -84,6 +84,7 @@ config INTEL_IOMMU_FLOPPY_WA config INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON bool "Enable Intel IOMMU scalable mode by default" + default y help Selecting this option will enable by default the scalable mode if hardware presents the capability. The scalable mode is defined in |