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[220.132.236.182]) by smtp.gmail.com with ESMTPSA id cm2sm104013pjb.23.2020.03.09.09.55.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Mar 2020 09:55:56 -0700 (PDT) From: Zong Li To: palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Zong Li Subject: [PATCH v3 3/9] riscv: add ARCH_SUPPORTS_DEBUG_PAGEALLOC support Date: Tue, 10 Mar 2020 00:55:38 +0800 Message-Id: <3b6b3c18655b41306e24a96d56abe1f860a6f900.1583772574.git.zong.li@sifive.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- arch/riscv/Kconfig | 3 +++ arch/riscv/mm/pageattr.c | 13 +++++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 71fabb0ffdbe..54437d7662a5 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -133,6 +133,9 @@ 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)); +} -- 2.25.1