linux-kernel - [PATCH 0/2] riscv: mm: add support for CONFIG_DEBUG

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Date:   Thu,  2 Jan 2020 11:12:38 +0800
From:   Zong Li <zong.li@...ive.com>
To:     palmer@...belt.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Zong Li <zong.li@...ive.com>
Subject: [PATCH 0/2] riscv: mm: add support for CONFIG_DEBUG_VIRTUAL

This patch implements CONFIG_DEBUG_VIRTUAL to do additional checks on
virt_to_phys and __pa_symbol calls. virt_to_phys used for linear mapping
check, and __pa_symbol used for kernel symbol check. In current RISC-V,
kernel image maps to linear mapping area. If CONFIG_DEBUG_VIRTUAL is
disable, these two functions calculate the offset on the address feded
directly without any checks.

Zong Li (2):
  riscv: mm: add support for CONFIG_DEBUG_VIRTUAL
  riscv: mm: use __pa_symbol for kernel symbols

 arch/riscv/Kconfig            |  1 +
 arch/riscv/include/asm/page.h | 16 +++++++++++++--
 arch/riscv/mm/Makefile        |  2 ++
 arch/riscv/mm/init.c          | 12 ++++++------
 arch/riscv/mm/physaddr.c      | 37 +++++++++++++++++++++++++++++++++++
 5 files changed, 60 insertions(+), 8 deletions(-)
 create mode 100644 arch/riscv/mm/physaddr.c

-- 
2.24.1