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([2001:8004:5110:2082:f68a:6871:1edc:69fe]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7cd9acabbfesm7220763a12.33.2024.08.26.20.58.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Aug 2024 20:58:28 -0700 (PDT) Message-ID: Date: Tue, 27 Aug 2024 13:58:19 +1000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 03/17] target/riscv: save and restore elp state on priv transitions To: Alistair Francis Cc: Deepak Gupta , qemu-riscv@nongnu.org, qemu-devel@nongnu.org, palmer@dabbelt.com, Alistair.Francis@wdc.com, bmeng.cn@gmail.com, liwei1518@gmail.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, jim.shu@sifive.com, andy.chiu@sifive.com, kito.cheng@sifive.com References: <20240826152949.294506-1-debug@rivosinc.com> <20240826152949.294506-4-debug@rivosinc.com> <056740af-1b61-426a-940d-3ca118ebd081@linaro.org> Content-Language: en-US From: Richard Henderson In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::c33; envelope-from=richard.henderson@linaro.org; helo=mail-oo1-xc33.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-riscv@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-riscv-bounces+qemu-riscv=archiver.kernel.org@nongnu.org Sender: qemu-riscv-bounces+qemu-riscv=archiver.kernel.org@nongnu.org On 8/27/24 13:53, Alistair Francis wrote: > Exposing the *envcfg CSRs to userspace seems tricky as everything is > currently built with the S/M CSRs removed from user builds. It is as simple as moving them out of ifdefs, then initializing them as needed in reset for CONFIG_USER_ONLY. That's what we do for Arm. r~