diff options
| author | Zong Li <zong.li@sifive.com> | 2020-03-10 00:55:38 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-03-26 09:24:36 -0700 |
| commit | 5fde3db5eb028b95aeefa1ab192d36800414e8b8 (patch) | |
| tree | 799134360c98c5e0e91f2c11f0e0cfe521116b56 /arch/riscv/mm | |
| parent | 395a21ff859c9c2471ea62d7d56af8a85ec333f7 (diff) | |
riscv: add ARCH_SUPPORTS_DEBUG_PAGEALLOC support
ARCH_SUPPORTS_DEBUG_PAGEALLOC provides a hook to map and unmap
pages for debugging purposes. Implement the __kernel_map_pages
functions to fill the poison pattern.
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/mm')
| -rw-r--r-- | arch/riscv/mm/pageattr.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 7be6cd67e2ef..728759eb530a 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -172,3 +172,16 @@ int set_direct_map_default_noflush(struct page *page) return walk_page_range(&init_mm, start, end, &pageattr_ops, &masks); } + +void __kernel_map_pages(struct page *page, int numpages, int enable) +{ + if (!debug_pagealloc_enabled()) + return; + + if (enable) + __set_memory((unsigned long)page_address(page), numpages, + __pgprot(_PAGE_PRESENT), __pgprot(0)); + else + __set_memory((unsigned long)page_address(page), numpages, + __pgprot(0), __pgprot(_PAGE_PRESENT)); +} |