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[2403:580b:97e8:0:321:6fb2:58f1:a1b1]) by smtp.gmail.com with ESMTPSA id d15-20020a170902b70f00b001d4974385d4sm4943434pls.250.2024.01.07.16.13.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Jan 2024 16:13:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1704672821; x=1705277621; 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=ydyQcpoWwEBe73HeZcT4G88tDIBP8gJ14l5X8kcFbbM=; b=fu0lqz0+ffhOW8dzQnXy9r2q2y5BKZqYnKx7fql8O0eNC7BPflZSlgk4xEZ17+ZqeW sSaIuC/ie50DPxv/BYVU9D9JlMpU8tQBU86KfOLMiCIaQhGYAOCXUCmMgXiRTXEBPY+B PFejHSnupfbBzK1aF0/WBLAni5Lz7tEAHfi9uN/UibyHaEhJ6cIWmaAiL+aY/KNILeg4 W4kjJRopEnPdLF498z1GSFH9JLA1W9ni/+ZmhxkzpfRv1p/phpIz34ctA6dmFRPAIspu hOr2FYAUyUEmhf/bTF8DVhMMJmFD3d5GCDCJpzjL+k+9twMgfQHdOwx8+o05tFQZzyib i9Mg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704672821; x=1705277621; 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=ydyQcpoWwEBe73HeZcT4G88tDIBP8gJ14l5X8kcFbbM=; b=q/wQaqT+EdQk9mW4rbOWc/La5RJZRQ/Nb7f/idaitoyhFx+N+1/qZYsYSQ27IicFQw 9uyk3LpLaBU528DuoiypeqiGcL9e9tUwdwcUy9QMXAMlfD2StJSt1JC5qZbHyQzXM994 Ru4jj9YQXzJVL7D5TBYH+GjxN/woe5yz/LjpdXtfxTSg5mtbocd4PVyPLRBzLEgp3LtA 3yAj0yxfpLp85/dsOFqHQ5KYVL2nD4rAA+f248RBaKGX43j3IbW8xrQIdD8BS+E+9yN7 ogj7hVVI0nw65E4WgI3g+GcVX4LOotiGq1y1mURUyZRT1mVv8jatET7E0c9moe3u47+N 2DNA== X-Gm-Message-State: AOJu0YwLlnbBLBH6QLZp3+us/Q9OBykTE6Z5tdL1lvYSt4BG3Ql9JB7H pH5FbCZQoWgurJn1ggyEJks= X-Google-Smtp-Source: AGHT+IHdHUcyp/ly2k/G7eeBGv3Zh5M9TU4WmWE7CKh6o0oAWBQEnBN2t8AA3J06Zjf2QKEq0t3cvA== X-Received: by 2002:a17:903:24f:b0:1d4:75c8:6d2d with SMTP id j15-20020a170903024f00b001d475c86d2dmr3811976plh.49.1704672821594; Sun, 07 Jan 2024 16:13:41 -0800 (PST) From: Alistair Francis X-Google-Original-From: Alistair Francis To: zhiwei_liu@linux.alibaba.com, qemu-riscv@nongnu.org, palmer@dabbelt.com, dbarboza@ventanamicro.com, bin.meng@windriver.com, qemu-devel@nongnu.org, liwei1518@gmail.com Cc: alistair23@gmail.com, Alistair Francis Subject: [PATCH 1/3] target/riscv: Assert that the CSR numbers will be correct Date: Mon, 8 Jan 2024 10:13:26 +1000 Message-ID: <20240108001328.280222-2-alistair.francis@wdc.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240108001328.280222-1-alistair.francis@wdc.com> References: <20240108001328.280222-1-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::630; envelope-from=alistair23@gmail.com; helo=mail-pl1-x630.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 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, T_SCC_BODY_TEXT_LINE=-0.01 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: 1704672871391100003 Content-Type: text/plain; charset="utf-8" The CSRs will always be between either CSR_MHPMCOUNTER3 and CSR_MHPMCOUNTER31 or CSR_MHPMCOUNTER3H and CSR_MHPMCOUNTER31H. So although ctr_index can't be negative, Coverity doesn't know this and it isn't obvious to human readers either. Let's add an assert to ensure that Coverity knows the values will be within range. To simplify the code let's also change the RV32 adjustment. Fixes: Coverity CID 1523910 Signed-off-by: Alistair Francis Reviewed-by: Daniel Henrique Barboza --- target/riscv/csr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index fde7ce1a53..336ec7eda7 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -195,8 +195,11 @@ static RISCVException mctr(CPURISCVState *env, int csr= no) =20 if ((riscv_cpu_mxl(env) =3D=3D MXL_RV32) && csrno >=3D CSR_MCYCLEH) { /* Offset for RV32 mhpmcounternh counters */ - base_csrno +=3D 0x80; + csrno -=3D 0x80; } + + g_assert(csrno >=3D CSR_MHPMCOUNTER3 && csrno <=3D CSR_MHPMCOUNTER31); + ctr_index =3D csrno - base_csrno; if ((BIT(ctr_index) & pmu_avail_ctrs >> 3) =3D=3D 0) { /* The PMU is not enabled or counter is out of range */ --=20 2.43.0