linux-kernel - RE: [Patch] Do not clear BSS region in x86 stub

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Message-ID:
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Date: Wed, 24 Jul 2024 01:48:52 +0000
From: "Shao, Marshall" <Marshall.Shao@...l.com>
To: Ard Biesheuvel <ardb@...nel.org>
CC: "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "hpa@...or.com" <hpa@...or.com>,
        "dave.hansen@...ux.intel.com"
	<dave.hansen@...ux.intel.com>,
        "bp@...en8.de" <bp@...en8.de>, "mingo@...hat.com" <mingo@...hat.com>,
        "tglx@...utronix.de"
	<tglx@...utronix.de>,
        "Mishra, Ashish" <Ashish.Mishra4@...l.com>,
        "Chia, Jia
 Yuan" <JiaYuan.Chia@...l.com>,
        "Dion, Christopher"
	<Christopher.Dion@...l.com>,
        "Caisse, Joe" <Joe.Caisse@...l.com>,
        "Mukundan,
 Govind" <Govind.Mukundan@...l.com>
Subject: RE: [Patch] Do not clear BSS region in x86 stub

> Can you explain why this is the case? systemd-stub should only use the
> EFI handover protocol for v5.8 or older.

Are you referring to this comment? In systemd/src/boot/efi/linux.c

> This method works for Linux 5.8 and newer on ARM/Aarch64, x86/x68_64 
> and RISC-V.

I noticed that this was not present in systemd v249, that could be the reason. 
Upgrading the systemd version may solve the issue. I will give it a try.

Anyway, thanks for bringing the issue to systemd's attention.