linux-kernel - Re: [RFC PATCH 6/7] x86/kexec: Debugging support: Dump registers on exception

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Message-ID: <1983c62c02b863f6d70198730dbb55a1ef7ceb9f.camel@infradead.org>
Date: Thu, 07 Nov 2024 21:21:58 -0800
From: David Woodhouse <dwmw2@...radead.org>
To: "H. Peter Anvin" <hpa@...or.com>, "peterz@...radead.org"
 <peterz@...radead.org>, "kexec@...ts.infradead.org"
 <kexec@...ts.infradead.org>,  "jpoimboe@...nel.org" <jpoimboe@...nel.org>
Cc: "horms@...nel.org" <horms@...nel.org>, "x86@...nel.org"
 <x86@...nel.org>,  "bp@...en8.de" <bp@...en8.de>, "mingo@...hat.com"
 <mingo@...hat.com>, "tglx@...utronix.de" <tglx@...utronix.de>,
 "kai.huang@...el.com" <kai.huang@...el.com>, 
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
 "nik.borisov@...e.com" <nik.borisov@...e.com>, 
 "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>
Subject: Re: [RFC PATCH 6/7] x86/kexec: Debugging support: Dump registers on
 exception

On Tue, 2024-11-05 at 18:47 -0800, H. Peter Anvin wrote:
> 
> 
> Yes, the linker script needs to happen. 

How does this look? Need to do 32-bit too, and actually test the
preserve_context case. And then port the debugging bits on top...

David Woodhouse (2):
      x86/kexec: Use linker script for relocate_kernel page layout
      x86/kexec: Add data section to relocate_kernel

 arch/x86/include/asm/sections.h      |  1 +
 arch/x86/kernel/machine_kexec_64.c   |  6 ++--
 arch/x86/kernel/relocate_kernel_64.S | 64 ++++++++++++++++++++----------------
 arch/x86/kernel/vmlinux.lds.S        | 12 ++++++-
 4 files changed, 51 insertions(+), 32 deletions(-)

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