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Message-ID: <e6c80abc40fa57526907eb0a0f18ef8cb72fe494.camel@infradead.org>
Date: Thu, 07 Nov 2024 21:35:53 -0800
From: David Woodhouse <dwmw2@...radead.org>
To: kexec@...ts.infradead.org
Cc: 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>, "Kirill A. Shutemov"
<kirill.shutemov@...ux.intel.com>, Kai Huang <kai.huang@...el.com>, Nikolay
Borisov <nik.borisov@...e.com>, linux-kernel@...r.kernel.org, Simon Horman
<horms@...nel.org>
Subject: Re: [RFC PATCH 2/2] x86/kexec: Add data section to relocate_kernel
On Fri, 2024-11-08 at 05:22 +0000, David Woodhouse wrote:
>
> @@ -128,7 +138,7 @@ SYM_CODE_START_LOCAL_NOALIGN(identity_mapped)
> /* set return address to 0 if not preserving context */
> pushq $0
> /* store the start address on the stack */
> - pushq %rdx
> + pushq start_address(%rip)
>
> /*
> * Clear X86_CR4_CET (if it was set) such that we can clear CR0_WP
Oops, drop that part; I did that (and actually defined it, and stored
the value in it) just to test that everything was actually *working*,
since I think the rest of the data fields are only used for
preserve_context mode. Fixed in the tree at
https://git.infradead.org/users/dwmw2/linux.git/shortlog/refs/heads//kexec-lds
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