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@xxxxxxxxxx> --- PS: I wonder whether we could remove IA-64 nowadays...? Documentation/admin-guide/kernel-parameters.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index b600df82669d..423427bf6e49 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6548,7 +6548,7 @@ 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 -- 2.45.2