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| author | Dave Jiang <dave.jiang@intel.com> | 2020-10-27 10:34:35 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-10-30 14:10:36 +0530 |
| commit | 8e50d392652f20616a136165dff516b86baf5e49 (patch) | |
| tree | f2008bb6857698bb9d875d7ec3206dc3c5fbcd3a /drivers/dma/Kconfig | |
| parent | 212a93ca435ec847bdfe238f225dd6e8b77927e9 (diff) | |
| download | linux-8e50d392652f20616a136165dff516b86baf5e49.tar.gz linux-8e50d392652f20616a136165dff516b86baf5e49.tar.bz2 linux-8e50d392652f20616a136165dff516b86baf5e49.zip | |
dmaengine: idxd: Add shared workqueue support
Add shared workqueue support that includes the support of Shared Virtual
memory (SVM) or in similar terms On Demand Paging (ODP). The shared
workqueue uses the enqcmds command in kernel and will respond with retry if
the workqueue is full. Shared workqueue only works when there is PASID
support from the IOMMU.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/160382007499.3911367.26043087963708134.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/Kconfig')
| -rw-r--r-- | drivers/dma/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 518a1437862a..6a908785a5f7 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -296,6 +296,16 @@ config INTEL_IDXD If unsure, say N. +# Config symbol that collects all the dependencies that's necessary to +# support shared virtual memory for the devices supported by idxd. +config INTEL_IDXD_SVM + bool "Accelerator Shared Virtual Memory Support" + depends on INTEL_IDXD + depends on INTEL_IOMMU_SVM + depends on PCI_PRI + depends on PCI_PASID + depends on PCI_IOV + config INTEL_IOATDMA tristate "Intel I/OAT DMA support" depends on PCI && X86_64 |