From: Jason Gunthorpe <jgg@nvidia.com>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: "Alexandre Ghiti" <alex@ghiti.fr>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Arnd Bergmann" <arnd@arndb.de>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"David Sterba" <dsterba@suse.com>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-doc@vger.kernel.org, linux-efi@vger.kernel.org,
linux-riscv@lists.infradead.org,
"Mark Rutland" <mark.rutland@arm.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Paul Walmsley" <pjw@kernel.org>,
"Randy Dunlap" <rdunlap@infradead.org>,
"Simon Glass" <sjg@chromium.org>,
"Shuah Khan" <skhan@linuxfoundation.org>,
"Nick Terrell" <terrelln@fb.com>, "Will Deacon" <will@kernel.org>,
"Alexandre Ghiti" <alexghiti@rivosinc.com>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Jonathan Cameron" <jonathan.cameron@oss.qualcomm.com>,
linux-integrity@vger.kernel.org,
"Palmer Dabbelt" <palmer@rivosinc.com>,
patches@lists.linux.dev, "Piotr Król" <piotr.krol@3mdeb.com>,
"Ross Philipson" <ross.philipson@gmail.com>,
"Sami Tolvanen" <samitolvanen@google.com>,
"Song Shuai" <songshuaishuai@tinylab.org>
Subject: Re: [PATCH v2 04/15] efi/libstub: Add a general way to get symbols from the vmlinux into zboot
Date: Tue, 3 Nov 2026 12:01:38 -0400 [thread overview]
Message-ID: <20261103160138.GA3165945@nvidia.com> (raw)
In-Reply-To: <4-v2-989a18390eb1+486-arm64_drtm_jgg@nvidia.com>
On Fri, Oct 02, 2026 at 08:31:41PM -0300, Jason Gunthorpe wrote:
> Currently the zboot stub has no access to symbols in the vmlinux. In
> contrast x86 has a voffsets.h header that allows the stub to know whatever
> symbols it wants for the decompressed image. ARM DRTM needs another 4
> symbol locations to work, and it also wants to compile the DRTM libstub
> code once and have it work in both zboot and embedded.
>
> The current solution in arm is "code_size" from commit 45dd403da851
> ("efi/zboot: arm64: Inject kernel code size symbol into the zboot
> payload"). This is neat, but it makes the zboot and embedded cases
> work differently.
>
> The x86 voffsets.h approach is also nice, but it can only work in zboot
> since it relies on 'nm vmlinux' to extract the locations. That's a
> circular dependency for the embedded stub.
Ard,
Did you have any further thoughts on this patch? Did the sketch you
showed me at LPC turn into anything?
It is rc1 and another month has gone by so I'd like to repost this
with all the feedback
Thanks,
Jason
next prev parent reply other threads:[~2026-11-03 16:02 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-02 23:31 [PATCH v2 00/15] arm64: DRTM, boot portion Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 01/15] efi/libstub: Fix error unwind freeing fdt in allocate_new_fdt_and_exit_boot() Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 02/15] efi/riscv: libstub: Don't set image_size in handle_kernel_image() Jason Gunthorpe
2026-10-21 16:00 ` Jonathan Cameron
2026-10-02 23:31 ` [PATCH v2 03/15] efi/libstub: Free cmdline_ptr in efi_pe_entry Jason Gunthorpe
2026-10-21 16:08 ` Jonathan Cameron
2026-10-02 23:31 ` [PATCH v2 04/15] efi/libstub: Add a general way to get symbols from the vmlinux into zboot Jason Gunthorpe
2026-10-21 16:16 ` Jonathan Cameron
2026-11-03 16:01 ` Jason Gunthorpe [this message]
2026-10-02 23:31 ` [PATCH v2 05/15] arm64/efi: Use CONFIG_EFI_STUB_IMAGE_INFO for code_size Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 06/15] efi/zboot: Lift efi_cache_sync_image() from efi_zboot_decompress() Jason Gunthorpe
2026-10-21 16:33 ` Jonathan Cameron
2026-10-02 23:31 ` [PATCH v2 07/15] efi/libstub: Add generic arch callbacks for DRTM Jason Gunthorpe
2026-10-21 16:51 ` Jonathan Cameron
2026-10-02 23:31 ` [PATCH v2 08/15] efi/libstub: Have efi_kaslr_relocate_kernel() handle extra_size Jason Gunthorpe
2026-10-21 17:06 ` Jonathan Cameron
2026-10-27 15:22 ` Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 09/15] efi: Add a __efi_data_handoff section annotation Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 10/15] efi/libstub: Put the stub's writable data in unique sections for DRTM Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 11/15] arm64: drtm: Add macro definitions for DEN0113 Jason Gunthorpe
2026-10-21 17:43 ` Jonathan Cameron
2026-10-27 15:30 ` Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 12/15] arm64: drtm: Update the linker script for EFI_STUB_DRTM Jason Gunthorpe
2026-10-20 22:49 ` Yeoreum Yun
2026-10-21 12:20 ` Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 13/15] arm64: drtm: Add drtm_entry point to head.S Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 14/15] arm64: drtm: Call UNPROTECT_MEMORY Jason Gunthorpe
2026-10-21 17:47 ` Jonathan Cameron
2026-10-21 17:50 ` Jason Gunthorpe
2026-10-27 15:40 ` Jason Gunthorpe
2026-10-02 23:31 ` [PATCH v2 15/15] efi/arm64: Implement ARM64 DRTM in the stub Jason Gunthorpe
2026-10-16 16:54 ` Jason Gunthorpe
2026-10-20 23:24 ` Yeoreum Yun
2026-10-20 23:34 ` Jason Gunthorpe
2026-10-21 6:14 ` Yeoreum Yun
2026-10-21 8:08 ` Yeoreum Yun
2026-10-21 14:06 ` Jason Gunthorpe
2026-10-21 14:17 ` Yeoreum Yun
2026-10-21 18:11 ` Jonathan Cameron
2026-10-21 23:39 ` Jason Gunthorpe
2026-10-22 0:31 ` Jonathan Cameron
2026-10-06 10:30 ` [PATCH v2 00/15] arm64: DRTM, boot portion Ard Biesheuvel
2026-10-16 16:51 ` Jason Gunthorpe
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