From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1BAF6299949 for ; Thu, 22 Jan 2026 13:08:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769087283; cv=none; b=CR370FZBo4oqArL0TPwG2CrI52noTzNHhG3GRUU5HwcIhKg89JM2qjQthMzsLfy4871zDWeXSnyqmkzYMnUwttf0FI5idx5bpQajVflbxdULV3Izyifpf+gxDkp3apj6mfnvQ66/457Qgkc5j3RSck7VOLdwwyARQVL5CHHq9CY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769087283; c=relaxed/simple; bh=q8vJzvFFxxDLcSEat8GmerefyDd6v+hhnYpnC5U9JO8=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=a+1xcaWXz9ayIa3rQrPUSkLD2c/fUYYPCGkxo8rWAAIAOyFu6wEW6Yu+ZEzT2tRjVLm4Y7IRsOKOKpnXgwQ/z3oD5fI1iHv5F0kouoVS+spJa5uuWANBhoe0mRwIKr8X8vyTkPq2bhwTuHddESbjke2rvPZ4GMvGlfwgtrKPpFk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Uh3PUk0U; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Uh3PUk0U" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1769087281; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Y1EIoFHHeJZuJl2UYkcRHiIobvkIXokPiJUvVd8BY0s=; b=Uh3PUk0UpMSF6i0FHkwYd22k876x05+TYKJaT9o6HytH6ZLUBZ1ZMk8ts8jbuCdGzO2NSL x236y4yjVTZgouc7Y4E41LTAHcAqzUXbUqmhhVXBKuyh/D/nwJ0Jvdt6lcVAdUcvapKZ0u mqHyxI7+AssMbfikf9vHm0kDy91jEKM= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-669-zJVEz-mTO92IjjIRfRLmng-1; Thu, 22 Jan 2026 08:07:57 -0500 X-MC-Unique: zJVEz-mTO92IjjIRfRLmng-1 X-Mimecast-MFC-AGG-ID: zJVEz-mTO92IjjIRfRLmng_1769087276 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id BF1071954B23; Thu, 22 Jan 2026 13:07:55 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.45.242.3]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4BCE41958DC0; Thu, 22 Jan 2026 13:07:55 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id EAF4A21E692D; Thu, 22 Jan 2026 14:07:52 +0100 (CET) From: Markus Armbruster To: Daniel P. =?utf-8?Q?Berrang=C3=A9?= Cc: =?utf-8?Q?Marc-Andr=C3=A9?= Lureau , Stefan Hajnoczi , qemu-devel , kvm , Helge Deller , Oliver Steffen , Stefano Garzarella , Matias Ezequiel Vara Larsen , Kevin Wolf , German Maglione , Hanna Reitz , Paolo Bonzini , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Thomas Huth , Mark Cave-Ayland , Alex Bennee , Pierrick Bouvier Subject: Re: Modern HMP In-Reply-To: ("Daniel P. =?utf-8?Q?Berrang?= =?utf-8?Q?=C3=A9=22's?= message of "Thu, 22 Jan 2026 12:21:02 +0000") References: <871pjigf6z.fsf_-_@pond.sub.org> <87ikctg8a8.fsf@pond.sub.org> Date: Thu, 22 Jan 2026 14:07:52 +0100 Message-ID: <875x8teqxj.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Daniel P. Berrang=C3=A9 writes: > On Thu, Jan 22, 2026 at 01:07:43PM +0100, Markus Armbruster wrote: [...] >> Marc-Andr=C3=A9 proposed Python or Rust. Anyone got a preference backed= by >> reasons? > > My suggestion would be Rust, as it allows the possibility to embed > that Rust impl inside the current QEMU binaries, to fully replace > the C code and retain broadly the same functionality. > > We might never do it, but it feels like a good idea to keep the > door option. Python rules that out entirely meaning we keep the > current C code forever, unless we do a full break with command > line compatibility at some point. qemu-system-FOO could conceivably spawn the standalone HMP program connected to a dedicated QMP monitor.