Merge tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma...

[platform/kernel/linux-starfive.git] / Documentation / admin-guide / kernel-parameters.txt

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 22d7b51..9dc68a1 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5999,8 +5999,11 @@
                        it if 0 is given (See Documentation/admin-guide/cgroup-v1/memory.rst)
 
        swiotlb=        [ARM,IA-64,PPC,MIPS,X86]
-                       Format: { <int> | force | noforce }
+                       Format: { <int> [,<int>] | force | noforce }
                        <int> -- Number of I/O TLB slabs
+                       <int> -- Second integer after comma. Number of swiotlb
+                                areas with their own lock. Will be rounded up
+                                to a power of 2.
                        force -- force using of bounce buffers even if they
                                 wouldn't be automatically used by the kernel
                        noforce -- Never use bounce buffers (for debugging)