linux-kernel - Re: [PATCH v7 1/3] efi/x86: Fix EFI memory map corruption with kexec

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Message-ID: <20240603165747.GGZl32C9yrmXJ4nhPT@fat_crate.local>
Date: Mon, 3 Jun 2024 18:57:47 +0200
From: Borislav Petkov <bp@...en8.de>
To: "Kalra, Ashish" <ashish.kalra@....com>
Cc: Mike Rapoport <rppt@...nel.org>, tglx@...utronix.de, mingo@...hat.com,
	dave.hansen@...ux.intel.com, x86@...nel.org, rafael@...nel.org,
	hpa@...or.com, peterz@...radead.org, adrian.hunter@...el.com,
	sathyanarayanan.kuppuswamy@...ux.intel.com, jun.nakajima@...el.com,
	rick.p.edgecombe@...el.com, thomas.lendacky@....com,
	michael.roth@....com, seanjc@...gle.com, kai.huang@...el.com,
	bhe@...hat.com, kirill.shutemov@...ux.intel.com, bdas@...hat.com,
	vkuznets@...hat.com, dionnaglaze@...gle.com, anisinha@...hat.com,
	jroedel@...e.de, ardb@...nel.org, kexec@...ts.infradead.org,
	linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Dave Young <dyoung@...hat.com>
Subject: Re: [PATCH v7 1/3] efi/x86: Fix EFI memory map corruption with kexec

On Mon, Jun 03, 2024 at 11:48:03AM -0500, Kalra, Ashish wrote:
> Yes, something similar as above, as efi_mem_reserve() is used to reserve
> boot service memory and is not necessary for kexec boot.
> 
> So, Dave Young (dyoung@...hat.com) had suggested that we skip
> efi_arch_mem_reserve() for kexec by checking the set EFI_MEMORY_RUNTIME
> attribute as below:a

efi_arch_mem_reserve() or efi_mem_reserve() altogether?

Btw, that below got really gibberished by your mail client. Snipped.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette