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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b471b96534sm2816857f8f.48.2025.07.04.09.25.19 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Jul 2025 09:25:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1751646320; x=1752251120; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=VdKchwbJEZ+nSckIGEWeS64CtMCPrL6GOAZLbL9tqic=; b=uP8BdVO5o79VUDTRZSZDq57gHJ0LZv2oI4FRow/H0P++cWro1pN5moD+HRt5/kGmYS wqTyvQzoVA9gEaD6bbXZWTt5GFFSwtgUm+wolU/aNpWnYqBx8nx53Jdwk+sXbatuaNWa 6/eXV9I0+cbwOmZIS1LILqKebR1RZZqiYO37wXBPMyu+A+Vr6AHWCA2TS1icZT2JrdZf R46/W8tSQRhj6uHAJlxp/CSsyAaL/Za6J9CxWXiKgsMI5UAYINqj2xe3cLovqyXLM8im LkSCShr1RYjB6/TSMox9178pRMyCrHUaN58JVFHLlM4nTvEcf22k7QcTJpTJ/FASRlp1 RpKw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751646320; x=1752251120; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=VdKchwbJEZ+nSckIGEWeS64CtMCPrL6GOAZLbL9tqic=; b=j4g9yCyAToxzyhBtgzHgRU4px6w4CZdeDhLb5al7NF5brVmR3YnaCj/E0K78Xi6jkh tSgGFRRSylvkjF83HMotQvwhXqNoN3tEUEtQbZlHdtINR3QZUmZMCWuglPHHftF/pViM FldqtVOKvkgnpzAbFnMdW3h8ZhQ/DOptIZ5k0yI0A9VWajTa9d/8ow0naDKLzMhNwqbS kFlnoniFBH/UroByb6zgQ3Zqdvena2RivwBcQU5coHIgpT6/QGoXnE8Hbqd3OThE4DzJ t7E6/FXQmiTy6hKWe0HKMMm6B7bYaUGNkb20+pTQ3dP12MVgTmVI1CoOzvCE3PxU+LM8 41cg== X-Gm-Message-State: AOJu0YxA2JLff87yTAUZxl+8QGSQ7q0V7UGbYCDWR9ltiVBs3TFRgTYM FXPcxilsNXMuh1qzIipeFFgAItsoFWlsrF5EVThBxcmRyLSObTEiXcL8zJKjqs5CfA3XCWhWpck a5kcf X-Gm-Gg: ASbGncszow10Os9aaTSuXWe+FFqTGYKce8LSDl0n3/X7pcYO8Lms6WPsqOOODaMLZoU DhKnttKnKtQL9AerzffGrgRzfJNkTwWu1p3caPee04LCEKhmamRxGE/KnvW3MHebio6tH7g/KfV vWSdFvSeIGT7ZfEmFlsFAPNeOVGq+dEPG6HbscPbCexbWLVfEZYa1aNhmHsEv1pvdIvHIBoNr0D T/Qo5uXBLTHOkPCYcNiFY7OzeP9iqH6vCGx71Capzu25glRN2HbEId6yzrVtPMHpfZTUnCScBny SaXU32JTE++oZDtStT1SpRnCfCJihrLHNtNgWmEG+mcTlCXtS6R93IuVnSTy9sUXbSMc X-Google-Smtp-Source: AGHT+IH4BqLtEhBTNP91QcXX/00HgnAisu9VG+gxVIf93epbZke4Ahz++3FEE+yxVfnHxCedVbq/EA== X-Received: by 2002:a05:600c:1c03:b0:43c:f513:9591 with SMTP id 5b1f17b1804b1-454b3124faemr34179895e9.14.1751646319926; Fri, 04 Jul 2025 09:25:19 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 018/119] target/arm: Disable FEAT_F64MM if maximum SVE vector size too small Date: Fri, 4 Jul 2025 17:23:18 +0100 Message-ID: <20250704162501.249138-19-peter.maydell@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250704162501.249138-1-peter.maydell@linaro.org> References: <20250704162501.249138-1-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::329; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x329.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 @linaro.org) X-ZM-MESSAGEID: 1751647172018116600 Content-Type: text/plain; charset="utf-8" From: Richard Henderson All F64MM instructions operate on a 256-bit vector. If only 128-bit vectors is supported by the cpu, then the cpu cannot enable F64MM. Suggested-by: Peter Maydell Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Message-id: 20250704142112.1018902-7-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/cpu64.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 1f3406708bd..77e7c4a6a52 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -259,6 +259,13 @@ void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp) /* From now on sve_max_vq is the actual maximum supported length. */ cpu->sve_max_vq =3D max_vq; cpu->sve_vq.map =3D vq_map; + + /* FEAT_F64MM requires the existence of a 256-bit vector size. */ + if (max_vq < 2) { + uint64_t t =3D GET_IDREG(&cpu->isar, ID_AA64ZFR0); + t =3D FIELD_DP64(t, ID_AA64ZFR0, F64MM, 0); + SET_IDREG(&cpu->isar, ID_AA64ZFR0, t); + } } =20 /* --=20 2.43.0