From: Borislav Petkov <bp@alien8.de>
To: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Ard Biesheuvel <ardb@kernel.org>,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Michael Roth <michael.roth@amd.com>
Subject: Re: [PATCH v3 00/17] x86: head_64.S spring cleaning
Date: Tue, 22 Nov 2022 23:20:34 +0100 [thread overview]
Message-ID: <Y31LMjXdOGtW8TLr@zn.tnic> (raw)
In-Reply-To: <26c34f9e-3b09-7b10-09a2-993a50790447@amd.com>
On Tue, Nov 22, 2022 at 03:49:29PM -0600, Tom Lendacky wrote:
> I bisected it to:
>
> 99b7f4b23d9f ("x86/boot/compressed, efi: Merge multiple definitions of image_offset into one")
>
> And doing the following fixed it:
>
> diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
> index cb5f0befee57..a0bfd31358ba 100644
> --- a/drivers/firmware/efi/libstub/x86-stub.c
> +++ b/drivers/firmware/efi/libstub/x86-stub.c
> @@ -23,7 +23,7 @@
> const efi_system_table_t *efi_system_table;
> const efi_dxe_services_table_t *efi_dxe_table;
> -u32 image_offset;
> +u32 image_offset __section(".data");
> static efi_loaded_image_t *image = NULL;
> static efi_status_t
>
> I assume it has to do with being in .data vs .bss and not being explicitly
> cleared with the encryption bit set. With the change to put image_offset in
> the .data section, it is read as zero, where as when it was in the .bss
> section it was reading "ciphertext".
Thank you both. I'll refresh the set and run it here tomorrow too, to
make sure it boots here too.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2022-11-22 22:20 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-22 16:10 [PATCH v3 00/17] x86: head_64.S spring cleaning Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 01/17] x86/compressed: efi-mixed: rename efi_thunk_64.S to efi-mixed.S Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 02/17] x86/compressed: efi-mixed: move 32-bit entrypoint code into .text section Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 03/17] x86/compressed: efi-mixed: move bootargs parsing out of 32-bit startup code Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 04/17] x86/compressed: efi-mixed: move efi32_pe_entry into .text section Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 05/17] x86/compressed: efi-mixed: move efi32_entry out of head_64.S Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 06/17] x86/compressed: efi-mixed: move efi32_pe_entry() " Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 07/17] x86/compressed: efi: merge multiple definitions of image_offset into one Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 08/17] x86/compressed: efi-mixed: simplify IDT/GDT preserve/restore Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 09/17] x86/compressed: avoid touching ECX in startup32_set_idt_entry() Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 10/17] x86/compressed: pull global variable ref up into startup32_load_idt() Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 11/17] x86/compressed: move startup32_load_idt() into .text section Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 12/17] x86/compressed: move startup32_load_idt() out of head_64.S Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 13/17] x86/compressed: move startup32_check_sev_cbit() into .text Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 14/17] x86/compressed: move startup32_check_sev_cbit() out of head_64.S Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 15/17] x86/compressed: adhere to calling convention in get_sev_encryption_bit() Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 16/17] x86/compressed: only build mem_encrypt.S if AMD_MEM_ENCRYPT=y Ard Biesheuvel
2022-11-22 16:10 ` [PATCH v3 17/17] efi: x86: Make the deprecated EFI handover protocol optional Ard Biesheuvel
2022-11-22 18:56 ` Randy Dunlap
2022-11-22 20:48 ` [PATCH v3 00/17] x86: head_64.S spring cleaning Tom Lendacky
2022-11-22 21:37 ` Ard Biesheuvel
2022-11-22 21:42 ` Ard Biesheuvel
2022-11-22 21:50 ` Tom Lendacky
2022-11-22 21:51 ` Ard Biesheuvel
2022-11-22 21:49 ` Tom Lendacky
2022-11-22 22:20 ` Borislav Petkov [this message]
2022-11-23 10:49 ` Borislav Petkov
2022-11-23 10:52 ` Ard Biesheuvel
2022-11-23 11:09 ` Borislav Petkov
2022-11-23 11:22 ` Ard Biesheuvel
2022-11-23 14:16 ` Tom Lendacky
2022-11-23 14:33 ` Ard Biesheuvel
2022-11-23 14:13 ` Tom Lendacky
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