From 135406cecb00983c7e98c2e3638f6f59080081ea Mon Sep 17 00:00:00 2001 From: Chris Goldsworthy Date: Fri, 25 Feb 2022 18:59:08 -0800 Subject: [PATCH] ANDROID: dma-direct: Document disable_dma32 Document the functionality of disable_dma32 as introduced in commit c3c2bb34ac8f ("ANDROID: arm64/mm: Add command line option to make ZONE_DMA32 empty"). Bug: 199917449 Signed-off-by: Chris Goldsworthy Change-Id: I32ab2969f59fcc49e9ac49e7e6b545f816d120f9 --- Documentation/admin-guide/kernel-parameters.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index fadb6b3b93cb..38614bd62e19 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -939,6 +939,10 @@ can be useful when debugging issues that require an SLB miss to occur. + disable_dma32= [KNL] + Dynamically disable ZONE_DMA32 on kernels compiled with + CONFIG_ZONE_DMA32=y. + stress_slb [PPC] Limits the number of kernel SLB entries, and flushes them frequently to increase the rate of SLB faults