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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id u12sm4978873wmu.28.2020.12.08.10.15.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Dec 2020 10:15:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=SwadCJ02g06YVmm9WBr3OA6H8xYCnuJ8Eyeb77/KvE4=; b=BUc1NOklc4kh6Uy7ShIfNvT/fw/u2Py0Iw8IgOwo9zwtWmwbdakX+ntiGZSfl4k8Jm xXnefgnV9y4SdEygu6Z2pZ6BKzhvZzLer/7lCTe6TaGvSlCj6EHrbexMEG3cD4EaOtKY zGWZtf7ErHf6GuzmmCr8OwpGQbtaRReBb+7d++b0cdgfvV8267RG3Bv2J39X3MZrep2F MNQMymlZ2LlJXr2FHcsMDsga2IBdskWsjk9NkCN4xs7Z+nrpRdMJfywNU3iPOVS+4KfX bile6e7e8ZtcxpmIAu3vGQazR1v33+Iy+CSWDtnaAeCnuc5QXtTUx4x0jS7KR4v5ouo1 q2SA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=SwadCJ02g06YVmm9WBr3OA6H8xYCnuJ8Eyeb77/KvE4=; b=IyORiSCrci/RA5SaLTifWBhfgrDvvwaFOWdHKDjSYDlDVMZohcHTpj5GcUIBqpzKe1 Ofw34D6NP/HKxCztLir8pfK5+cP60JbKs9iEXvQ5hlkTSI8KdlIDppVowqmryUbHj3cl Zn7s50xOovT8FzNtfgux63GyFhKVlXxNvJJzq0V9fCKuLbO2Jl8KsqVRKp8sm+FVGo0O zOYx7aObrxGjOavTGXAb9xsIFeeYM3eqKHpTmjQ7UeT1PauDile2N2BhlHnOUIjvgu4k fqqDwHi4p7wSr0jN0nsEOfaftfTgXD+x6ot+HdTDeasPB1dXE1T3/tTCR/gWnkDoiM/l gOOQ== X-Gm-Message-State: AOAM531WuT6Fb7og1BKtzvieWmQ/Qj0rPJpBEGUKrViiKd6rVbPJVg1e SbnBmWMQG0yaBV3n+hD72dXrZFDmbdbleQ== X-Google-Smtp-Source: ABdhPJxZKMfGz8TRUAQVXYLhYh32JScuhaPq87clcsfkJ6mqime8WcBlaKLETc62zm0ssrIZ92dMKw== X-Received: by 2002:adf:fa0c:: with SMTP id m12mr26712057wrr.222.1607451359039; Tue, 08 Dec 2020 10:15:59 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PATCH 2/4] target/mips: Don't use clock_get_ns() in clock period calculation Date: Tue, 8 Dec 2020 18:15:52 +0000 Message-Id: <20201208181554.435-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201208181554.435-1-peter.maydell@linaro.org> References: <20201208181554.435-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::443; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x443.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 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: Damien Hedde , Luc Michel , Aleksandar Rikalo , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Currently the MIPS code uses the old clock_get_ns() API to calculate a time length in nanoseconds: cpu->cp0_count_rate * clock_get_ns(MIPS_CPU(cpu)->clock) This relies on the clock having a period which is an exact number of nanoseconds. Switch to the new clock_ticks_to_ns() function, which does the multiplication internally at a higher precision. Signed-off-by: Peter Maydell Reviewed-by: Luc Michel Reviewed-by: Richard Henderson --- target/mips/cpu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/mips/cpu.c b/target/mips/cpu.c index 76d50b00b42..de15ec6068a 100644 --- a/target/mips/cpu.c +++ b/target/mips/cpu.c @@ -147,8 +147,8 @@ static void mips_cp0_period_set(MIPSCPU *cpu) { CPUMIPSState *env =3D &cpu->env; =20 - env->cp0_count_ns =3D cpu->cp0_count_rate - * clock_get_ns(MIPS_CPU(cpu)->clock); + env->cp0_count_ns =3D clock_ticks_to_ns(MIPS_CPU(cpu)->clock, + cpu->cp0_count_rate); assert(env->cp0_count_ns); } =20 --=20 2.20.1