[PATCH] Documentation/admin-guide: mark memmap parameter is supported by a few architectures

[PATCH] Documentation/admin-guide: mark memmap parameter is supported by a few architectures

[Barry Song]

early_param memmap is only implemented on X86, MIPS and XTENSA. To avoid
wasting users’ time on trying this on platform like ARM, mark it clearly.

Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
---
 * the background was that I spent one hour on using memmap on arm64, only
   to find memmap= is not implemented on most architectures;

 Documentation/admin-guide/kernel-parameters.rst | 1 +
 Documentation/admin-guide/kernel-parameters.txt | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst
index 6d421694d98e..06fb1b4aa849 100644
--- a/Documentation/admin-guide/kernel-parameters.rst
+++ b/Documentation/admin-guide/kernel-parameters.rst
@@ -172,6 +172,7 @@ parameter is applicable::
 	X86	Either 32-bit or 64-bit x86 (same as X86-32+X86-64)
 	X86_UV	SGI UV support is enabled.
 	XEN	Xen support is enabled
+	XTENSA	xtensa architecture is enabled.
 
 In addition, the following text indicates that the option::
 
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 526d65d8573a..8bdbc555f221 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2709,7 +2709,7 @@
 			option description.
 
 	memmap=nn[KMG]@ss[KMG]
-			[KNL] Force usage of a specific region of memory.
+			[KNL, X86, MIPS, XTENSA] Force usage of a specific region of memory.
 			Region of memory to be used is from ss to ss+nn.
 			If @ss[KMG] is omitted, it is equivalent to mem=nn[KMG],
 			which limits max address to nn[KMG].
-- 
2.25.1

Re: [PATCH] Documentation/admin-guide: mark memmap parameter is supported by a few architectures

[Mike Rapoport]

On Wed, Nov 18, 2020 at 02:41:45PM +1300, Barry Song wrote:
> early_param memmap is only implemented on X86, MIPS and XTENSA. To avoid
> wasting users’ time on trying this on platform like ARM, mark it clearly.
> 
> Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>

Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>

> ---
>  * the background was that I spent one hour on using memmap on arm64, only
>    to find memmap= is not implemented on most architectures;
> 
>  Documentation/admin-guide/kernel-parameters.rst | 1 +
>  Documentation/admin-guide/kernel-parameters.txt | 2 +-
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst
> index 6d421694d98e..06fb1b4aa849 100644
> --- a/Documentation/admin-guide/kernel-parameters.rst
> +++ b/Documentation/admin-guide/kernel-parameters.rst
> @@ -172,6 +172,7 @@ parameter is applicable::
>  	X86	Either 32-bit or 64-bit x86 (same as X86-32+X86-64)
>  	X86_UV	SGI UV support is enabled.
>  	XEN	Xen support is enabled
> +	XTENSA	xtensa architecture is enabled.
>  
>  In addition, the following text indicates that the option::
>  
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 526d65d8573a..8bdbc555f221 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2709,7 +2709,7 @@
>  			option description.
>  
>  	memmap=nn[KMG]@ss[KMG]
> -			[KNL] Force usage of a specific region of memory.
> +			[KNL, X86, MIPS, XTENSA] Force usage of a specific region of memory.
>  			Region of memory to be used is from ss to ss+nn.
>  			If @ss[KMG] is omitted, it is equivalent to mem=nn[KMG],
>  			which limits max address to nn[KMG].
> -- 
> 2.25.1
> 

-- 
Sincerely yours,
Mike.