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[2001:67c:2178:6::1c]) by mx.google.com with ESMTPS id j20-20020a05600c191400b003d1e3e54bcbsi66582wmq.9.2023.01.19.11.07.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Jan 2023 11:07:56 -0800 (PST) Received-SPF: pass (google.com: domain of farosas@suse.de designates 2001:67c:2178:6::1c as permitted sender) client-ip=2001:67c:2178:6::1c; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=T+1pxWUd; dkim=neutral (no key) header.i=@suse.de header.s=susede2_ed25519; spf=pass (google.com: domain of farosas@suse.de designates 2001:67c:2178:6::1c as permitted sender) smtp.mailfrom=farosas@suse.de; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=suse.de Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 3B1FA21A09; Thu, 19 Jan 2023 19:07:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1674155276; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=w7I1W5CWg/LENy6VDuyLGzRAH+xMKRQ96FXlbBo05pU=; b=T+1pxWUdpyet95C+SyxNVVEq1hiKdyHeCgdvWIMn/lrwdMIQ49DYWoeENxa7vXynJq2Udy f72WUM1i484eHq/yajRPIaZBLQvHSxLHbUSQmELd0GW65EyNWhALs5Jeevtt+YcRp49V3j sR0uiTt5FiVU3dSxlXniekXpCR+d/GE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1674155276; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=w7I1W5CWg/LENy6VDuyLGzRAH+xMKRQ96FXlbBo05pU=; b=dyMEzC3RjDnxl6JaQgnOwAenmF6hmFhylWEuFWMQwxSz4dSQgIk0qnHaorD7QfzFw7fxrd aPsI74hHkWTa5KBw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id B7068139ED; Thu, 19 Jan 2023 19:07:55 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 7JSkHwuVyWOiNQAAMHmgww (envelope-from ); Thu, 19 Jan 2023 19:07:55 +0000 From: Fabiano Rosas To: Richard Henderson , qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Peter Maydell , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Alex =?utf-8?Q?Benn?= =?utf-8?Q?=C3=A9e?= , Paolo Bonzini , Claudio Fontana , Eduardo Habkost , Alexander Graf , Cornelia Huck Subject: Re: [RFC PATCH v4 01/15] target/arm: Move 64-bit TCG CPUs into tcg/ In-Reply-To: <6fb8d60e-4283-1429-fd15-f8b799d277cf@linaro.org> References: <20230119135424.5417-1-farosas@suse.de> <20230119135424.5417-2-farosas@suse.de> <6fb8d60e-4283-1429-fd15-f8b799d277cf@linaro.org> Date: Thu, 19 Jan 2023 16:07:53 -0300 Message-ID: <87mt6e4a2e.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain X-TUID: 5YjIPxvCCG2b Richard Henderson writes: > On 1/19/23 03:54, Fabiano Rosas wrote: >> Move the 64-bit CPUs that are TCG-only: >> - cortex-a35 >> - cortex-a55 >> - cortex-a72 >> - cortex-a76 >> - a64fx >> - neoverse-n1 >> >> Keep the CPUs that can be used with KVM: >> - cortex-a57 >> - cortex-a53 >> - max >> - host > > All of those cpus can be used with kvm, if and only if you have matching hardware. There > is no rationale for considering any of them differently. But is that allowed by QEMU today? If so I must be missing something. I see that kvm_arch_init_vcpu looks at cpu->kvm_target, which is only set at kvm_arm_set_cpu_features_from_host, called from aarch64_host_initfn. if (cpu->kvm_target == QEMU_KVM_ARM_TARGET_NONE || !object_dynamic_cast(OBJECT(cpu), TYPE_AARCH64_CPU)) { error_report("KVM is not supported for this guest CPU type"); return -EINVAL; }