From nobody Sat Nov 15 14:52:44 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=sifive.com ARC-Seal: i=1; a=rsa-sha256; t=1751030570; cv=none; d=zohomail.com; s=zohoarc; b=E3BjmRIgpU3F47FIsQTvyBqYh3lC2a7xGBj0/t27pLhx4q8TtaBegQVtdNsdywsqdHxq/UcID7llFWfk6EkkQMrpdLWo3c7Kn0c4vP7pre7nVYv3y4dfpGz7DNt3XbqwQC6oYRi5eVdNHxSk3jBzfq5IIkajuK8V/0d2+k05WDU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1751030570; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=HSzhEP9dEzA+7lfjcbU4kZWDFhSDWRTA9w9lKAghg8o=; b=ZAbk7JwkRwE7umpHtnsvu1wOO/V1h60ZZvzrUTPAbvzsvwdArlXoLpv7U7CJBf2g0ELVGStZ5HxnrklBY01Ka6dPuxSJ66sBXmHaTqvkT/hjGpeugxfNAErCQFpH0giant34Li3c3QrkkA3QSUeVDVDKXVvSMPO7RdUJbTxn1ZM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1751030570402214.8518516191466; Fri, 27 Jun 2025 06:22:50 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uV91w-0005hm-F8; Fri, 27 Jun 2025 09:22:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uV91t-0005gh-U8 for qemu-devel@nongnu.org; Fri, 27 Jun 2025 09:22:09 -0400 Received: from mail-pl1-x634.google.com ([2607:f8b0:4864:20::634]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1uV91q-0003W5-MP for qemu-devel@nongnu.org; Fri, 27 Jun 2025 09:22:09 -0400 Received: by mail-pl1-x634.google.com with SMTP id d9443c01a7336-234b9dfb842so21798915ad.1 for ; Fri, 27 Jun 2025 06:22:06 -0700 (PDT) Received: from duncan.localdomain (114-35-142-126.hinet-ip.hinet.net. [114.35.142.126]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23acb3c475bsm16083705ad.212.2025.06.27.06.22.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Jun 2025 06:22:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; t=1751030525; x=1751635325; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=HSzhEP9dEzA+7lfjcbU4kZWDFhSDWRTA9w9lKAghg8o=; b=d33Idx2JTYPJj10P7dBovoJ5A+i7fLqD/3ky1Pu1dXlQzyQdiyBNoglQxEqriwSuSX 7Q21vRY9yanVV1TnlJFxLIC09ddtrM3MFbQ/O99LHAVLDGXu/SaAPB9462w7HyQhb/uj 30hwXFUBwIdS/68RjQqi6znzb9BTzbUmgQeHeEX9EhaQ/09K5Cu0MxWD9PFDcrX0fRx2 0J07YzLZ3/TuF8d7UxC4M44ie2UINUHEbtZ/miSuhcqZAlA5xJrHO+tHpItpxK14JWGT fkQXV8br/yxM993D8qJKDB3b5to1qHjCSq5HZPP8ZEPKS2y0AdNgDMGrBcGJd52nvgPs jrIw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751030525; x=1751635325; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=HSzhEP9dEzA+7lfjcbU4kZWDFhSDWRTA9w9lKAghg8o=; b=FPXYmNvdwS+uyMw5yUy+mpAaUkkZwUqzRmwr3tebTFat7itpPTJJ8NJoOWVzbr000p miaJ6Z/B4L/KL6f6SpWzEf6tWIGHlYKJVPK/7DkJeSA8xARwLpsUTjG06kQHnLkM60Ma Ju0QVAOguoeUduYmkahf5NiS1fR5Al20dO6mAfzxV8Hc3vWC3DwoETTqPGS3OBbFD2Z5 tK8ju0bWLCy1kJIop+sdDqypgKb8ov+lVOMW7yynXJzkhmjg0yZkBiIJQ2+2QUTEoBtx 0mXC0+/tkmQbWoXQCJDpRNTlXC3rEX4sHjhzzFj4HZyfMFcwlToKrdCyJAGOnpv0kTvo KTWQ== X-Gm-Message-State: AOJu0YxGYeCHjS0sYJJhzO+VO3HdJf392XS4tDmaXpRQcQuFM5Vp5PZ8 mMaqNBm33h+bTzf8qTtlIRYQFtuUFV6WAvEJjs53WhUlBsTsHVxbwcDwMZvd/b4keDQKygwj3Io hK7pqad9IVlEl9mi1GUtqLvbIYyNaLNDNUqhwC6i0eWyNsKFlJug94A+SH6N1CdQtBiV4dsF8fl NzqFutHD2ovEGNlTCmwG4x+L/pA9KknAYfDzS+2uZveQ== X-Gm-Gg: ASbGnct+Z963+GFxh5u7iFhQgMN1IjKQjTL2McBQtH+GrkxDgMxbp6YCRkmnaJkxKaR qX1Sty/Fkrx0AtyK6Oog8iRxaorA9HlwC86m+ZtYOT1v8qS7I24Hko9oI3noLJvVUBJ5eneHtbQ YSvJICxf8Cgy/nA25c2VI5nyOJ6SzLuPbp0/3QSi+I6ZbBYsf6qJUVyaZofcIqg9l09/Cn5NOz/ i06XnArg/CDjHdjla5pIjl2qnOkcfw2pTfmDUBBxdiGpErfR19GCtEhbi0fAFqFbvHpVFeDm4PZ iyDRvCHXGlfLgbuUMlERHwZ+uDI/tqD4jQlXuhL+WxA/QhPALuVwN7IWKO8nmiFNw1LaAPRyr9q GpDGoVxGqgqNWe+r0X03SyuoyfP6ETmQ= X-Google-Smtp-Source: AGHT+IHxREoC2veGcD8WiMGg/igBtulwDyefeM2wbbWKscmJnLSnC6qKlLlti17ao9c5gsetlSeRvA== X-Received: by 2002:a17:902:d58e:b0:235:779:edf0 with SMTP id d9443c01a7336-23ac463560amr42025145ad.50.1751030524466; Fri, 27 Jun 2025 06:22:04 -0700 (PDT) From: Max Chou To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Palmer Dabbelt , Alistair Francis , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , Max Chou Subject: [PATCH] target/riscv: rvv: Minimum VLEN needs to respect V/Zve extensions Date: Fri, 27 Jun 2025 21:21:56 +0800 Message-ID: <20250627132156.440214-1-max.chou@sifive.com> X-Mailer: git-send-email 2.43.0 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::634; envelope-from=max.chou@sifive.com; helo=mail-pl1-x634.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: 2.1.29 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 @sifive.com) X-ZM-MESSAGEID: 1751030571254116600 Content-Type: text/plain; charset="utf-8" According to the RISC-V instruction set manual, the minimum VLEN needs to respect the following extensions: Extension Minimum VLEN * V 128 * Zve64[d|f|x] 64 * Zve32[f|x] 32 Signed-off-by: Max Chou Reviewed-by: Nutty Liu --- target/riscv/tcg/tcg-cpu.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c index 163e7ce3642..187534009dd 100644 --- a/target/riscv/tcg/tcg-cpu.c +++ b/target/riscv/tcg/tcg-cpu.c @@ -416,12 +416,21 @@ static void riscv_cpu_validate_misa_priv(CPURISCVStat= e *env, Error **errp) static void riscv_cpu_validate_v(CPURISCVState *env, RISCVCPUConfig *cfg, Error **errp) { + uint32_t min_vlen; uint32_t vlen =3D cfg->vlenb << 3; =20 - if (vlen > RV_VLEN_MAX || vlen < 128) { + if (riscv_has_ext(env, RVV)) { + min_vlen =3D 128; + } else if (cfg->ext_zve64x) { + min_vlen =3D 64; + } else if (cfg->ext_zve32x) { + min_vlen =3D 32; + } + + if (vlen > RV_VLEN_MAX || vlen < min_vlen) { error_setg(errp, "Vector extension implementation only supports VLEN " - "in the range [128, %d]", RV_VLEN_MAX); + "in the range [%d, %d]", min_vlen, RV_VLEN_MAX); return; } =20 --=20 2.43.0