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Sun, 09 May 2021 19:27:53 -0700 (PDT) MIME-Version: 1.0 References: <20210507081654.11056-1-wangjunqiang@iscas.ac.cn> <20210507081654.11056-3-wangjunqiang@iscas.ac.cn> In-Reply-To: From: Bin Meng Date: Mon, 10 May 2021 10:27:42 +0800 Message-ID: Subject: Re: [RFC PATCH 2/5] hw/intc: Add Nuclei ECLIC device To: Alistair Francis Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2607:f8b0:4864:20::b36; envelope-from=bmeng.cn@gmail.com; helo=mail-yb1-xb36.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: liweiwei@iscas.ac.cn, "open list:RISC-V" , wangjunqiang , Bin Meng , "qemu-devel@nongnu.org Developers" , Alistair Francis , alapha23@gmail.com, Palmer Dabbelt Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Mon, May 10, 2021 at 10:21 AM Alistair Francis wrote: > > On Fri, May 7, 2021 at 11:24 PM wangjunqiang wrote: > > > > This patch provides an implementation of Nuclei ECLIC Device. > > Nuclei processor core have been equipped with an Enhanced Core Local > > Interrupt Controller (ECLIC), which is optimized based on the RISC-V > > standard CLIC, to manage all interrupt sources. > > > > https://doc.nucleisys.com/nuclei_spec/isa/eclic.html > > Hello, > > There are patches on the QEMU list adding support for the CLIC. How > different is the ECLIC from the CLIC? Could you use the CLIC as a > starting point instead of implementing a new interrupt controller? > That's my thought too when I saw this patch at first. A better way is to scandalize the CLIC support in QEMU first, then we will see how Nuclei's eCLIC could be built on top of that. Thanks! Regards, Bin