linux-kernel - Re: [PATCHv2 4/4] x86/64/kexec: Rewrite init_transition_pgtable() with kernel_ident_mapping

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Message-ID: <cc8205ea-3f4d-7571-1114-f1ecb725efa3@amd.com>
Date: Wed, 14 Aug 2024 11:02:20 -0500
From: Tom Lendacky <thomas.lendacky@....com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Andy Lutomirski <luto@...nel.org>,
 Peter Zijlstra <peterz@...radead.org>, Baoquan He <bhe@...hat.com>
Cc: Ard Biesheuvel <ardb@...nel.org>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Thomas Zimmermann <tzimmermann@...e.de>,
 Sean Christopherson <seanjc@...gle.com>, linux-kernel@...r.kernel.org,
 linux-acpi@...r.kernel.org
Subject: Re: [PATCHv2 4/4] x86/64/kexec: Rewrite init_transition_pgtable()
 with kernel_ident_mapping_init()

On 8/14/24 07:46, Kirill A. Shutemov wrote:
> init_transition_pgtable() sets up transitional page tables. Rewrite it
> using kernel_ident_mapping_init() to avoid code duplication.
> 
> Change struct kimage_arch to track allocated page tables as a list, not
> linking them to specific page table levels.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Reviewed-by: Tom Lendacky <thomas.lendacky@....com>

> ---
>  arch/x86/include/asm/kexec.h       |  5 +-
>  arch/x86/kernel/machine_kexec_64.c | 89 +++++++++++-------------------
>  2 files changed, 32 insertions(+), 62 deletions(-)
>