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[2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71908fc8fdesm3833034b3a.1.2024.09.11.22.30.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Sep 2024 22:30:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1726119027; x=1726723827; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9EfpUjlJoapmNabWHYxOeHBJ2rWzJCTO2iJ5K7dyJK0=; b=FfwRmmwWmzk3ThrglottA0+tDXlniKQ3N0lwAXppamdlED/wuY2rCDx1/2swuFkiJg C9TuXLjD2IBC64AcSEkC4AIFVwqEyfPjyPLvtFflqAGjYpZIcPmid3elBTC8vA0/PDEy 5qpz4o3gMvEkSqxgLyqsrzj6hcUSkZx8QkL9l4dqEfNaB8fhyckWVl6bnVIHV7eWfTTD WGQZLs2yHCt1/TslGUZtSvmGJHVCcNxb+PBuSlikPY1mBrtuNALRuAT1WUV/14IutcUV BOYFDH18RPMkMr0ToADcNrhwRzOuUi+OZB+IG5G52F71jng/KEUac2ZBsZLZI8OFlqoM kfRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726119027; x=1726723827; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9EfpUjlJoapmNabWHYxOeHBJ2rWzJCTO2iJ5K7dyJK0=; b=Yi0ypLQUcXB96k1ZLa7IM0aVXKjUU1sSptik5FmiGWw+bScFo7rRhTcRLnZaSrBuf6 PzTHrONAQE5MgPhAJvunNZhkGhyyOaKf2dzYHEri/gG8fwu6OjvbWw1KDmvo70zFZBJD xxwc9GmstytYIus5/wYq5kkhF3H/8lvneaRZKMAg5jllBNY1hptQxdwbwE8NZQB0vaky lwSqtFCwHVVM17hr8QAhWjX3tM7QiSntiod1lgSXsHDvZkCEmrivLvltC3X6UNV0xv1a 8QJ6cyoWNPoYltcoT6uNQ6MN+rmMhpBb9JGd0c2GRJvC/NZ2SI4BTNIAalcX9knX83ey j0SQ== X-Gm-Message-State: AOJu0Yy867aokBr/xQwLJ3nlXkPigcaKTLOwWQIyedMMooBisI8Kko+0 dJb4/QC/Y51iAdiv0J/2L2NCNMI88Web6rX1tdnmPX611bdc+0J0TrovoA== X-Google-Smtp-Source: AGHT+IEOxXXdYaUc+ZCD6Jq811wkYqmu8Rf8jbRARxhIxaGj3q5CuxKdihHUyzOH9ZjNKnZ+qnrEZg== X-Received: by 2002:a05:6a21:58d:b0:1cf:5370:3b0 with SMTP id adf61e73a8af0-1cf75f00300mr2655576637.12.1726119027526; Wed, 11 Sep 2024 22:30:27 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Andrew Jones , Alistair Francis Subject: [PULL 09/47] target/riscv: Stop timer with infinite timecmp Date: Thu, 12 Sep 2024 15:29:14 +1000 Message-ID: <20240912052953.2552501-10-alistair.francis@wdc.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240912052953.2552501-1-alistair.francis@wdc.com> References: <20240912052953.2552501-1-alistair.francis@wdc.com> 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=2607:f8b0:4864:20::531; envelope-from=alistair23@gmail.com; helo=mail-pg1-x531.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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_ENVFROM_END_DIGIT=0.25, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1726119609093116600 Content-Type: text/plain; charset="utf-8" From: Andrew Jones While the spec doesn't state it, setting timecmp to UINT64_MAX is another way to stop a timer, as it's considered setting the next timer event to occur at infinity. And, even if the time CSR does eventually reach UINT64_MAX, the very next tick will bring it back to zero, once again less than timecmp. For this reason riscv_timer_write_timecmp() special cases UINT64_MAX. However, if a previously set timecmp has not yet expired, then setting timecmp to UINT64_MAX to disable / stop it would not work, as the special case left the previous QEMU timer active, which would then still deliver an interrupt at that previous timecmp time. Ensure the stopped timer will not still deliver an interrupt by also deleting the QEMU timer in the UINT64_MAX special case. Fixes: ae0edf2188b3 ("target/riscv: No need to re-start QEMU timer when tim= ecmp =3D=3D UINT64_MAX") Signed-off-by: Andrew Jones Reviewed-by: Alistair Francis Message-ID: <20240829084002.1805006-2-ajones@ventanamicro.com> Signed-off-by: Alistair Francis --- target/riscv/time_helper.c | 1 + 1 file changed, 1 insertion(+) diff --git a/target/riscv/time_helper.c b/target/riscv/time_helper.c index 8d245bed3a..bc0d9a0c4c 100644 --- a/target/riscv/time_helper.c +++ b/target/riscv/time_helper.c @@ -92,6 +92,7 @@ void riscv_timer_write_timecmp(CPURISCVState *env, QEMUTi= mer *timer, * equals UINT64_MAX. */ if (timecmp =3D=3D UINT64_MAX) { + timer_del(timer); return; } =20 --=20 2.46.0