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From: Masaki Tachibana <mas-tachibana@vf.jp.nec.com>
Subject: RE: [PATCH 3/4] Makedumpfile: Add a new function check_5level_paging()
Date: Mon, 7 May 2018 07:21:08 +0000
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References: <20180302054841.22195-1-bhe@redhat.com>
 <20180302054841.22195-4-bhe@redhat.com>
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To: Baoquan He <bhe@redhat.com>
Cc: "douly.fnst@cn.fujitsu.com" <douly.fnst@cn.fujitsu.com>, "indou.takao@jp.fujitsu.com" <indou.takao@jp.fujitsu.com>, "kexec@lists.infradead.org" <kexec@lists.infradead.org>, Keiichi Nakamura <kei-nakamura@vt.jp.nec.com>

Hi Baoquan,

Sorry for the late reply.

> +check_5level_paging(void)
> +{
> +	if (NUMBER(pgtable_l5_enabled) != 0)
Is this if (NUMBER(pgtable_l5_enabled) != NOT_FOUND_NUMBER && NUMBER(pgtable_l5_enabled) != 0)  ?
If so, I will correct this.

> +		return TRUE;


Thanks
Tachibana


> -----Original Message-----
> From: kexec [mailto:kexec-bounces@lists.infradead.org] On Behalf Of Baoquan He
> Sent: Friday, March 02, 2018 2:49 PM
> To: kexec@lists.infradead.org
> Cc: douly.fnst@cn.fujitsu.com; indou.takao@jp.fujitsu.com; Hayashi Masahiko() <mas-hayashi@tg.jp.nec.com>;
> Baoquan He <bhe@redhat.com>; Tachibana Masaki() <mas-tachibana@vf.jp.nec.com>
> Subject: [PATCH 3/4] Makedumpfile: Add a new function check_5level_paging()
> 
> Use it to check if the corrupted kernel is in 5-level paging.
> 
> Signed-off-by: Baoquan He <bhe@redhat.com>
> ---
>  arch/x86_64.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/x86_64.c b/arch/x86_64.c
> index cbe45c2..e88ee0b 100644
> --- a/arch/x86_64.c
> +++ b/arch/x86_64.c
> @@ -33,6 +33,15 @@ get_xen_p2m_mfn(void)
>  	return NOT_FOUND_LONG_VALUE;
>  }
> 
> +static int
> +check_5level_paging(void)
> +{
> +	if (NUMBER(pgtable_l5_enabled) != 0)
> +		return TRUE;
> +	else
> +		return FALSE;
> +}
> +
>  unsigned long
>  get_kaslr_offset_x86_64(unsigned long vaddr)
>  {
> --
> 2.13.6
> 
> 
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