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Tue, 21 Jan 2020 20:38:54 -0800 (PST) Date: Tue, 21 Jan 2020 20:38:51 -0800 (PST) From: Paul Walmsley X-X-Sender: paulw@viisi.sifive.com To: Zong Li Subject: Re: [PATCH 1/2] riscv: mm: add support for CONFIG_DEBUG_VIRTUAL In-Reply-To: <20200102031240.44484-2-zong.li@sifive.com> Message-ID: References: <20200102031240.44484-1-zong.li@sifive.com> <20200102031240.44484-2-zong.li@sifive.com> User-Agent: Alpine 2.21.9999 (DEB 301 2018-08-15) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200121_203856_520902_492CDDD0 X-CRM114-Status: UNSURE ( 7.56 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-riscv@lists.infradead.org, aou@eecs.berkeley.edu, palmer@dabbelt.com, linux-kernel@vger.kernel.org Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, 2 Jan 2020, Zong Li wrote: > 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. Reviewed-by: Paul Walmsley Tested-by: Paul Walmsley - Paul