From 03d939c7e3d8800a9feb54808929c5776ac510eb Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Fri, 22 Jan 2021 11:46:00 -0700 Subject: dmaengine: idxd: add module parameter to force disable of SVA Add a module parameter that overrides the SVA feature enabling. This keeps the driver in legacy mode even when intel_iommu=sm_on is set. In this mode, the descriptor fields must be programmed with dma_addr_t from the Linux DMA API for source, destination, and completion descriptors. Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/161134110457.4005461.13171197785259115852.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul --- Documentation/admin-guide/kernel-parameters.txt | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation/admin-guide') diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index c722ec19cd00..c25786b95419 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1673,6 +1673,12 @@ In such case C2/C3 won't be used again. idle=nomwait: Disable mwait for CPU C-states + idxd.sva= [HW] + Format: + Allow force disabling of Shared Virtual Memory (SVA) + support for the idxd driver. By default it is set to + true (1). + ieee754= [MIPS] Select IEEE Std 754 conformance mode Format: { strict | legacy | 2008 | relaxed } Default: strict -- cgit v1.2.3