linux-kernel - Re: [PATCH] Documentation: Add "S390" to the swiotlb kernel parameter

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Date: Fri, 14 Jun 2024 14:39:47 +0200
From: Claudio Imbrenda <imbrenda@...ux.ibm.com>
To: Thomas Huth <thuth@...hat.com>
Cc: linux-doc@...r.kernel.org,
        Christian Borntraeger
 <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Heiko
 Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander
 Gordeev <agordeev@...ux.ibm.com>,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jonathan Corbet <corbet@....net>, Sven
 Schnelle <svens@...ux.ibm.com>
Subject: Re: [PATCH] Documentation: Add "S390" to the swiotlb kernel
 parameter

On Fri, 14 Jun 2024 10:14:38 +0200
Thomas Huth <thuth@...hat.com> wrote:

> 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@...hat.com>

Acked-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>

> ---
>  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