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From:   Petr Tesarik <petrtesarik@huaweicloud.com>
To:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Conor Dooley <conor.dooley@microchip.com>,
        Li Huafei <lihuafei1@huawei.com>,
        Liao Chang <liaochang1@huawei.com>,
        Masahiro Yamada <masahiroy@kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Heiko Stuebner <heiko@sntech.de>,
        Ricardo Ribalda <ribalda@chromium.org>,
        Alyssa Ross <hi@alyssa.is>, Li Zhengyu <lizhengyu3@huawei.com>,
        linux-riscv@lists.infradead.org (open list:RISC-V ARCHITECTURE),
        kexec@lists.infradead.org, linux-kernel@vger.kernel.org (open list)
Cc:     Torsten Duwe <duwe@suse.de>,
        Roberto Sassu <roberto.sassu@huaweicloud.com>, petr@tesarici.cz
Subject: [PATCH v2 0/3] RISC-V: Fix a few kexec_file_load(2) failures
Date:   Wed, 26 Jul 2023 11:53:58 +0200
Message-Id: <cover.1690365011.git.petr.tesarik.ext@huawei.com>
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From: Petr Tesarik <petr.tesarik.ext@huawei.com>

The kexec_file_load(2) syscall does not work at least in some kernel
builds. For details see the relevant section in this blog post:

https://sigillatum.tesarici.cz/2023-07-21-state-of-riscv64-kdump.html

This patch series handles an additional relocation types, removes the need
to implement a Global Offset Table (GOT) for the purgatory and fixes the
placement of initrd.

Changelog
=========

Changes from v1:
- Replace memcmp() with a for loop.
- Drop handling of 16-bit add/subtract relocations. They were used only
  by alternatives in strcmp(), which was referenced only by string.o.
- Add the initrd placement fix.

Petr Tesarik (1):
  riscv/purgatory: do not link with string.o and its dependencies

Torsten Duwe (2):
  riscv/kexec: handle R_RISCV_CALL_PLT relocation type
  riscv/kexec: load initrd high in available memory

 arch/riscv/kernel/elf_kexec.c    |  3 ++-
 arch/riscv/purgatory/Makefile    | 26 +-------------------------
 arch/riscv/purgatory/purgatory.c |  6 ++++--
 3 files changed, 7 insertions(+), 28 deletions(-)

-- 
2.25.1