From: Zong Li Date: Mon, 9 Mar 2020 16:55:38 +0000 (+0800) Subject: riscv: add ARCH_SUPPORTS_DEBUG_PAGEALLOC support X-Git-Tag: rel_imx_5.10.35_2.0.0-somdevices.0~2422^2~26 X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=5fde3db5eb028b95aeefa1ab192d36800414e8b8;p=linux.git 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 Signed-off-by: Palmer Dabbelt --- 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)); +}