diff options
| author | Zong Li <zong.li@sifive.com> | 2020-03-09 19:55:38 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-03-26 19:24:36 +0300 |
| commit | 5fde3db5eb028b95aeefa1ab192d36800414e8b8 (patch) | |
| tree | 799134360c98c5e0e91f2c11f0e0cfe521116b56 | |
| parent | 395a21ff859c9c2471ea62d7d56af8a85ec333f7 (diff) | |
| download | linux-5fde3db5eb028b95aeefa1ab192d36800414e8b8.tar.xz | |
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>
| -rw-r--r-- | arch/riscv/Kconfig | 3 | ||||
| -rw-r--r-- | arch/riscv/mm/pageattr.c | 13 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 34fc7450b9dd..31fbc6ef7a6d 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -131,6 +131,9 @@ config ARCH_SELECT_MEMORY_MODEL config ARCH_WANT_GENERAL_HUGETLB def_bool y +config ARCH_SUPPORTS_DEBUG_PAGEALLOC + def_bool y + config SYS_SUPPORTS_HUGETLBFS def_bool y 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)); +} |