linux-kernel - Re: [PATCH] arm64/ptdump:display the Linear Mapping start marker

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Date:   Tue, 2 Feb 2021 11:39:45 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Hailong Liu <liuhailongg6@....com>,
        Catalin Marinas <catalin.marinas@....com>
Cc:     Will Deacon <will@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Steven Price <steven.price@....com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Mark Brown <broonie@...nel.org>,
        Anshuman Khandual <anshuman.khandual@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Hailong Liu <liu.hailong6@....com.cn>
Subject: Re: [PATCH] arm64/ptdump:display the Linear Mapping start marker

On 2/2/21 7:07 AM, Hailong Liu wrote:
> From: Hailong Liu <liu.hailong6@....com.cn>
> 
> The current /sys/kernel/debug/kernel_page_tables does not display the
> *Linear Mapping start* marker on arm64, which I think should be paired
> with the *Linear Mapping start* marker.

paired with itself?  just asking...

> 
> Since *Linear Mapping start* is the first marker, use level=-1 to display it.
> 
> Signed-off-by: Hailong Liu <liu.hailong6@....com.cn>
> ---
>  arch/arm64/mm/ptdump.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c
> index 04137a8f3d2d..0e050d76b83a 100644
> --- a/arch/arm64/mm/ptdump.c
> +++ b/arch/arm64/mm/ptdump.c
> @@ -324,6 +324,7 @@ void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
>  	st = (struct pg_state){
>  		.seq = s,
>  		.marker = info->markers,
> +		.level = -1,
>  		.ptdump = {
>  			.note_page = note_page,
>  			.range = (struct ptdump_range[]){
> 


-- 
~Randy