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([2602:ae:1541:f901:b714:1fce:85fa:2fc7]) by smtp.gmail.com with ESMTPSA id x6-20020a170902ea8600b0019aa5e0aadesm2185463plb.110.2023.03.31.18.53.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Mar 2023 18:53:15 -0700 (PDT) Message-ID: Date: Fri, 31 Mar 2023 18:53:13 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Subject: Re: [PATCH v4 7/8] target/riscv: Enable PC-relative translation in system mode Content-Language: en-US To: Weiwei Li , qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, wangjunqiang@iscas.ac.cn, lazyparser@gmail.com References: <20230331150609.114401-1-liweiwei@iscas.ac.cn> <20230331150609.114401-8-liweiwei@iscas.ac.cn> From: Richard Henderson In-Reply-To: <20230331150609.114401-8-liweiwei@iscas.ac.cn> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::102d; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x102d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 3/31/23 08:06, Weiwei Li wrote: > The existence of CF_PCREL can improve performance with the guest > kernel's address space randomization. Each guest process maps > libc.so (et al) at a different virtual address, and this allows > those translations to be shared. > > Signed-off-by: Weiwei Li > Signed-off-by: Junqiang Wang > Reviewed-by: LIU Zhiwei > --- > target/riscv/cpu.c | 2 ++ > 1 file changed, 2 insertions(+) Reviewed-by: Richard Henderson r~