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Date:   Sun, 6 Aug 2023 12:17:10 +0200
From:   Borislav Petkov <bp@alien8.de>
To:     Ard Biesheuvel <ardb@kernel.org>
Cc:     linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
        Evgeniy Baskov <baskov@ispras.ru>,
        Andy Lutomirski <luto@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Alexey Khoroshilov <khoroshilov@ispras.ru>,
        Peter Jones <pjones@redhat.com>,
        Gerd Hoffmann <kraxel@redhat.com>,
        Dave Young <dyoung@redhat.com>,
        Mario Limonciello <mario.limonciello@amd.com>,
        Kees Cook <keescook@chromium.org>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Joerg Roedel <jroedel@suse.de>
Subject: Re: [PATCH v8 00/23] efi/x86: Avoid bare metal decompressor during
 EFI boot
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On Sun, Aug 06, 2023 at 12:05:25PM +0200, Ard Biesheuvel wrote:
> I suspect this should fix the issue:
> 
> --- a/arch/x86/kernel/head_64.S
> +++ b/arch/x86/kernel/head_64.S
> @@ -110,6 +110,7 @@ SYM_CODE_START_NOALIGN(startup_64)
>          * programmed into CR3.
>          */
>         leaq    _text(%rip), %rdi
> +       movq    %r15, %rsi
>         call    __startup_64

Yah, I was suspecting we're not passing boot_params properly somewhere.
Aaand there it is.

So yes, that fixes it.

Lemme know when you've refreshed your branch so that I can continue
testing.

Thx.

-- 
Regards/Gruss,
    Boris.

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