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[2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-21105707064sm3022795ad.70.2024.10.30.20.53.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Oct 2024 20:53:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730346837; x=1730951637; 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=muvNKmT1P++0ktM2BHqIeOncicaOsvuhV5HRETcfW/E=; b=hWRKQHg0WRRz3+yECJ1r7PC6rh4YLzFc0CgvZJ9KJZxqLx0ISUFyKAoxVbIZ8yXtmV rh1BKGp4265/YlFd7PGf+1atvNkXc3ITzFOXzFYLNQU8aOOsLvtieV31+HHpNyTppnrD Nd93VRcJB4vxmXjTWCT6rHOfBEvDBdmqcAPzhgbOGNIOow26mdvx4GjkPo6AFEwO0E74 jn7LpmohH6B306NitudhYB6QDljsYQaqFu9Lx/JBPWMy1V7tKapKxLd51zl7Y3fFytzg 5iEMLCokmJFuWFzEmUeRpsjUsQqbSF9eSoCJbIKrkyAFGpxKrEkQ++uJ/rwoOKbpTDq7 87rA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730346837; x=1730951637; 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=muvNKmT1P++0ktM2BHqIeOncicaOsvuhV5HRETcfW/E=; b=WE0zLZTtJ9gLLAxYqQYFZteramzKrxtrWbhJ7U20Kd8WfiZyzJj47GyyTkjO1rc7ME WJPwyGEk3JUAc2xMaDekhuYOFphZdyKwuRMt2vgrABpYAi2tNnNM5IGAVqFD+2LHbaKj gHyPUWZBK+c1zg80sPNSHPwtPD9pqtJb/ETGnx+ir7YtznpyYVqVaGVflyFz4LTZpNmv nyzMUuOimf2BJrJ8oEo7Zf49wgwQznWTO28yJJPy0gtvmmfCVjEziBRYOtn6Z2Mvt9+/ cHvpRmpPPTW243AFS+HoZxW7VvwRbSE9P+eo6e4fv+MeOCTQuJkfzS2TitwWxj9JDSiX 0qHA== X-Gm-Message-State: AOJu0Yx4O2/DCe5olnvJH9UkISpubX0wd1eKgbkLiaqui3hG6ttVphaL V5AnlItzRSEGza9zzGbC8nr0b8vNoVB1KVUokSPgdPVlbIiX2wJBCZlUt0eX X-Google-Smtp-Source: AGHT+IHxNHIbE47JhobfFzqFwTglEGstqpYgraT7H9XKwIH/J5UtWaPcVXkE9HlkvfwehVJCMRQgHg== X-Received: by 2002:a17:903:440d:b0:20c:ab29:8133 with SMTP id d9443c01a7336-210c68ebe70mr204953155ad.27.1730346836716; Wed, 30 Oct 2024 20:53:56 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Sergey Makarov , Alistair Francis Subject: [PULL 10/50] hw/intc: Make zeroth priority register read-only Date: Thu, 31 Oct 2024 13:52:38 +1000 Message-ID: <20241031035319.731906-11-alistair.francis@wdc.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241031035319.731906-1-alistair.francis@wdc.com> References: <20241031035319.731906-1-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::62a; envelope-from=alistair23@gmail.com; helo=mail-pl1-x62a.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: 1730346932482116600 Content-Type: text/plain; charset="utf-8" From: Sergey Makarov According to PLIC specification chapter 4, zeroth priority register is reserved. Discard writes to this register. Signed-off-by: Sergey Makarov Reviewed-by: Alistair Francis Message-ID: <20240918140229.124329-2-s.makarov@syntacore.com> Signed-off-by: Alistair Francis --- hw/intc/sifive_plic.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c index 7f43e96310..8de3a654bc 100644 --- a/hw/intc/sifive_plic.c +++ b/hw/intc/sifive_plic.c @@ -189,8 +189,13 @@ static void sifive_plic_write(void *opaque, hwaddr add= r, uint64_t value, =20 if (addr_between(addr, plic->priority_base, plic->num_sources << 2)) { uint32_t irq =3D (addr - plic->priority_base) >> 2; - - if (((plic->num_priorities + 1) & plic->num_priorities) =3D=3D 0) { + if (irq =3D=3D 0) { + /* IRQ 0 source prioority is reserved */ + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Invalid source priority write 0x%" + HWADDR_PRIx "\n", __func__, addr); + return; + } else if (((plic->num_priorities + 1) & plic->num_priorities) =3D= =3D 0) { /* * if "num_priorities + 1" is power-of-2, make each register b= it of * interrupt priority WARL (Write-Any-Read-Legal). Just filter --=20 2.47.0