linux-kernel - Re: [PATCH v5 0/3] Add restrictions for kexec/kdump jumping between 5-level and 4-level kernel

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Date:   Tue, 11 Jun 2019 13:47:54 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...nel.org, bp@...en8.de, hpa@...or.com,
        kirill.shutemov@...ux.intel.com, x86@...nel.org, dyoung@...hat.com
Subject: Re: [PATCH v5 0/3] Add restrictions for kexec/kdump jumping between
 5-level and 4-level kernel

Hi,

On 05/24/19 at 03:38pm, Baoquan He wrote:
> 

Ping.

Can anyone help do further reviewing on this patchset? Or consider
merging since people have ack-ed?

Thanks
Baoquan

> The v4 cover letter tells the background about this adding, paste the
> link here for reference:
> http://lkml.kernel.org/r/20190509013644.1246-1-bhe@redhat.com
> 
> Changelog:
> v4->v5:
>   Tune code and log per Dave's comments, no functional change.
>   - In patch 2, change the printed erorr message; 
>   - In patch 3, add macro SZ_64T and use it in code, and remove the
>     obsolete code comment.
> v3->v4:
>   No functional change.
>   - Rewrite log of patch 1/3 tell who the newly added bits are gonna be
>     used.
>   - Rewrite log of patch 2/3 per tglx's words.
>   - Add Kirill's Acked-by.
> 
> v2->v3:
>   Change the constant to match the notation for the rest of defines as
>   Kirill suggested;
> v1->v2:
>   Correct the subject of patch 1 according to tglx's comment;
>   Add more information to cover-letter to address reviewers' concerns;
> 
> Baoquan He (3):
>   x86/boot: Add xloadflags bits for 5-level kernel checking
>   x86/kexec/64: Error out if try to jump to old 4-level kernel from
>     5-level kernel
>   x86/kdump/64: Change the upper limit of crashkernel reservation
> 
>  arch/x86/boot/header.S                | 12 +++++++++++-
>  arch/x86/include/uapi/asm/bootparam.h |  2 ++
>  arch/x86/kernel/kexec-bzimage64.c     |  5 +++++
>  arch/x86/kernel/setup.c               | 15 ++++++++++++---
>  include/linux/sizes.h                 |  1 +
>  5 files changed, 31 insertions(+), 4 deletions(-)
> 
> -- 
> 2.17.2
>