Documentation: Add "S390" to the swiotlb kernel parameter

The "swiotlb" kernel parameter is used on s390 for protected virt since
commit 64e1f0c531d1 ("s390/mm: force swiotlb for protected virtualization")
and thus should be marked in kernel-parameters.txt accordingly.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240614081438.553160-1-thuth@redhat.com

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 797ba942786cff277905879cff5f0915fe400c3d..f7d28c76c3707031bf9b5ac7917da5a26ade0165 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6526,7 +6526,7 @@
                        This parameter controls use of the Protected
                        Execution Facility on pSeries.
 
-       swiotlb=        [ARM,IA-64,PPC,MIPS,X86,EARLY]
+       swiotlb=        [ARM,IA-64,PPC,MIPS,X86,S390,EARLY]
                        Format: { <int> [,<int>] | force | noforce }
                        <int> -- Number of I/O TLB slabs
                        <int> -- Second integer after comma. Number of swiotlb