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([187.210.107.185]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-2efd50b1bd3sm3785013fac.28.2025.07.02.05.22.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Jul 2025 05:22:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1751458943; x=1752063743; 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=phdMuO5PFzyuS0l+J9EZDp4Ant5FWeh391ft9bOj440=; b=DfR/EY1LqA953Zrk6ojxvFrHT2BmG09bIFl2jMesbajv7OdfjL8Fw8DPr4GmC43DPP cIu8vOCV4xvBjLVr6gwgaUW3rqXYBdZ9xyeVdg/1k1+/6o5iL4fL5Q4Gwb3P8zm8c5SS /QJaUyyWA/TsSQHYfLjiY9vLZVRX/z1Erk2ja1qJhTSIpVLhoeIDoXy7Yq5IQwmBSEAm lKXfzgRl176SP40EdwF0vb9tKBCh/jhewydYbV8b13sh1aMiEd/x50C/6iRv2nQdVjYp RQVJ+/iX72XgEUNbyAiZvjv0gjWUdRrvEl1fzxzgBjv6qvNsjeTOBMHGe8IXIlixnBZF W87g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751458943; x=1752063743; 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=phdMuO5PFzyuS0l+J9EZDp4Ant5FWeh391ft9bOj440=; b=s5HbHpWdHiDHVJFWEJnzDOolsgIWNkDSddKz0kCqojh69nvmVxj1//pDGBSg1hSVHH c5/p/Fwy2RI8MwQEkl8718QL5PIm01ouBWlo12E1j9OPOblBZo4q8zhSg88gRG/lWYiR mFI+x86OcO7nIGlGLygfRs5/TNK+E3YW4/BXAkP8e4hg46UkgX/4C/WboadsdWRtKIb0 gp9acqUWhnh1aVuxVPs4FgNYvm/JOGLR3LcDGguRJWqfc6u8J1ny5Ohh8mxDnwoET95s ttuoS45qTZ7rifLBEOCzDV9scaA4tOVEKPt5NoyPWgu/bOFHFvUDWkMuZw8cRF05h1BR 2TPA== X-Gm-Message-State: AOJu0YxnKyjePy3Q9Lgr+Xdlv5UHSWG5mOMdRWFbFoZaSM6ch1M4sRkb auPRo1BsEmPAvnFtggrowlbZvpQ9j0uxaEYyrAMeZIFcK98Iwfusm+rBJ+nuJB7qOHWA6mX8hez XaYra3WA= X-Gm-Gg: ASbGncudHYjKLMFSlqnCYwbM88IEjEVOH1YKBHhFOgfbnxICX9HE8IkGR/zl3BLEynv oxoSo9iceYgcZLrmd8k5iXgFj0FH/eElYZ5Jpwus4rcV7xYKfw3NYdcAt3n/T/64rJGyY9aFOI7 z5sv12TOfn166jmAKsTLL/3r2C9Ltu2EF9rUvpETNt/TQjFR2BMl0PH7+feGrtnum0z2XySl8HH rPONBwgqmgBdW3HwWccQwyTP2tUWakwHAVznGVO0LK4g+s9M5QhkgaEZByCqkSkOAV5+8zN8Wjr hvivewTfLUdPEJpBbWOC741M+m4TlawJnGyfjVac07NT52eH5lLn5M3DR40bdORpoBOv44or1Sp 33v9P X-Google-Smtp-Source: AGHT+IGZT6I/weadZbfX4/XW3bxIKBvsuN66aPgMB1uXdj2N1Uj3SoCrvNW9krezOWg0pb38YipVrA== X-Received: by 2002:a05:6870:7007:b0:2d6:6639:52d9 with SMTP id 586e51a60fabf-2f5c7adb95amr2103359fac.32.1751458943106; Wed, 02 Jul 2025 05:22:23 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, peter.maydell@linaro.org Subject: [PATCH v3 06/10] target/arm: Disable FEAT_F64MM if maximum SVE vector size too small Date: Wed, 2 Jul 2025 06:22:09 -0600 Message-ID: <20250702122213.758588-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250702122213.758588-1-richard.henderson@linaro.org> References: <20250702122213.758588-1-richard.henderson@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=2001:4860:4864:20::2a; envelope-from=richard.henderson@linaro.org; helo=mail-oa1-x2a.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=unavailable 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: 1751459157520116600 Content-Type: text/plain; charset="utf-8" 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 Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/cpu64.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 200da1c489..c5c289eadf 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -237,6 +237,12 @@ 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) { + cpu->isar.id_aa64zfr0 =3D FIELD_DP64(cpu->isar.id_aa64zfr0, + ID_AA64ZFR0, F64MM, 0); + } } =20 /* --=20 2.43.0