From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.90_1) id 1mkp7d-0006d4-1e for mharc-qemu-riscv@gnu.org; Wed, 10 Nov 2021 10:02:45 -0500 Received: from eggs.gnu.org ([209.51.188.92]:59324) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkp7a-0006ZH-Vz for qemu-riscv@nongnu.org; Wed, 10 Nov 2021 10:02:43 -0500 Received: from [2a00:1450:4864:20::32d] (port=51092 helo=mail-wm1-x32d.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mkp7Z-0000wR-C6 for qemu-riscv@nongnu.org; Wed, 10 Nov 2021 10:02:42 -0500 Received: by mail-wm1-x32d.google.com with SMTP id 133so2511417wme.0 for ; Wed, 10 Nov 2021 07:02:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=dpI2Xz6NLO1nS5zqbS04Ga8aIoKZ333qxRJLl89Qio4=; b=nzga8W5eJlbeNXoLiDkgGpW9iSR7nG66dWnj+NpjT73iT2UvAAEO8d9MnUV5ob/fZz 9K8f0AUZtXZ04+bp+IhIV2qqBOQSu+IjITFwvnej530V3IihEECpUDsxydPWGmN80eXS bBtvLmtbQlSwSo0LCSt1X93Ly19okDhDGzOD81di14tNS05kLBDwn0yWvrpISVbiMobb 1s+T2aOnbcUWOfJJAY8X+imSPJ8ukEAsb8dy2TFuQicIT9+36/C0ODSNXkmZDXezLCdO 2KC/PvrRSYeGDCwmy4VyRR7VIGEcRv7ciV99/d84Px+dbF670pprEf1oNidrs/T7JrZJ cwLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=dpI2Xz6NLO1nS5zqbS04Ga8aIoKZ333qxRJLl89Qio4=; b=Y14ZK47XcWY9j9CzUgPEX8riVse/cgOZj8eyfwCixJLA4o7HxV4a6BJKB7FiqFWsHG jLVVa75Lc70dCmA7/eS6NYdfcvVTNCdIaiNnVHVNxxSnAlRVc1xoA8J+KfdfBSVDYsd/ GFH5SvPxygwcF8gGUmrKpM+IvmjSWQZ+7aS7qlQWPZVNgRaPVeQGtQAK5CW0sGfhA4DU 0drtYAx3KmRV6bgutzAwCcFOAY/iOVSr/uVgXW7NJ/vrfYldhUCCa8Hzgmhorqa9q4ix rJSsF5Gu90xBeP6pAktmEZBDBg9uhs1VmnnZ/trqcG7Q7Llm9CNMyfZtgC5nw0B+FBKV APqA== X-Gm-Message-State: AOAM533uAkwSCz5fKSfSMtlnZMB7ADWxUbB+eAmM9NHvic6wCUJbsytL VuaUdmuaMF2g3VukiBd+6qzpCA== X-Google-Smtp-Source: ABdhPJwHIvmhPlXQCJbGViZfe+f/A7Sr/0Eaas/lNvptfeKu4up5xTMmEUL2qtltVd10Xww5iCqgHQ== X-Received: by 2002:a1c:488:: with SMTP id 130mr224056wme.157.1636556559768; Wed, 10 Nov 2021 07:02:39 -0800 (PST) Received: from [192.168.8.106] (104.red-2-142-241.dynamicip.rima-tde.net. [2.142.241.104]) by smtp.gmail.com with ESMTPSA id u23sm151668wru.21.2021.11.10.07.02.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Nov 2021 07:02:39 -0800 (PST) Subject: Re: [PATCH v2 14/14] target/riscv: Enable uxl field write To: LIU Zhiwei , qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Alistair.Francis@wdc.com, palmer@dabbelt.com, bin.meng@windriver.com References: <20211110070452.48539-1-zhiwei_liu@c-sky.com> <20211110070452.48539-15-zhiwei_liu@c-sky.com> <59e04faf-3832-bec9-52f3-d5a91d20b893@linaro.org> From: Richard Henderson Message-ID: <9b290086-010b-5cb6-23e0-b7188445a546@linaro.org> Date: Wed, 10 Nov 2021 16:02:35 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::32d (failed) Received-SPF: pass client-ip=2a00:1450:4864:20::32d; envelope-from=richard.henderson@linaro.org; helo=mail-wm1-x32d.google.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 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=-1.678, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: , X-List-Received-Date: Wed, 10 Nov 2021 15:02:43 -0000 On 11/10/21 3:38 PM, LIU Zhiwei wrote: >> Why do you not allow writes to SXL? > > That means we still don't support the change of SXLEN. > I didn't check the S-mode CSRs behavior when XLEN changes in this patch set. > > For example, the behavior of satp when trap into M-mode from S-mode if SXLEN=32 and MXLEN=64. Ah, good answer. r~