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| author | Joerg Roedel <jroedel@suse.de> | 2018-10-01 17:28:13 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-10-01 17:28:13 +0200 |
| commit | 6f20a97e0979cfc1878ebfd85a6ee69a962e546f (patch) | |
| tree | e3074bde20ec8f0541e84f718aa3f26c8a5aa71d /Documentation/admin-guide | |
| parent | Linux 4.19-rc6 (diff) | |
| parent | iommu/arm-smmu: Support non-strict mode (diff) | |
| download | linux-6f20a97e0979cfc1878ebfd85a6ee69a962e546f.tar.xz linux-6f20a97e0979cfc1878ebfd85a6ee69a962e546f.zip | |
Merge branch 'for-joerg/arm-smmu/updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 92eb1f42240d..7c992b6d27fa 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1749,6 +1749,18 @@ nobypass [PPC/POWERNV] Disable IOMMU bypass, using IOMMU for PCI devices. + iommu.strict= [ARM64] Configure TLB invalidation behaviour + Format: { "0" | "1" } + 0 - Lazy mode. + Request that DMA unmap operations use deferred + invalidation of hardware TLBs, for increased + throughput at the cost of reduced device isolation. + Will fall back to strict mode if not supported by + the relevant IOMMU driver. + 1 - Strict mode (default). + DMA unmap operations invalidate IOMMU hardware TLBs + synchronously. + iommu.passthrough= [ARM64] Configure DMA to bypass the IOMMU by default. Format: { "0" | "1" } |