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 2E4333A875A for ; Sun, 3 May 2026 07:37:31 +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=1777793853; cv=none; b=vAvuYzjsRhnnzAeMypccBUuB57xUBJu0OKvbrFesjrnmcTCM71RBTJl1bRHPv+IiD/ho55yEl/e1m/dmAg62HFwwKpo3BqKZ0hDbYr3lFx2P3MSJi+pVVeFVnYZJbU6VUYXJN9tzdy+ffILTbtjZE6vvgUaC/8g4v32Pc3S5dX8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777793853; c=relaxed/simple; bh=mQ3RERfSargoI8u5+xiGk5B5UTtgEPku8aqw3drKrBI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:content-type; b=p03FpBa3ySFqFR5j59OhOryBL4xqYIKzlJ3fRFeI181x3asNr8MzeP9Jvyxlr0rCSahPze7OiEeV0pgFqBikk43QkRY9Y3B/wKCDzruDUW5HOuRSsAtOap/fm2+6j8uunN/8TU69SF4qDB8HKAGxtY9JtIT7kXAYaCz5wcJfBzE= 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=PdRyK5ty; 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="PdRyK5ty" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1777793850; 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=62oLUEjH9LSAL/SkXO11p8fSs2k2Esjx+HksDcmaSDQ=; b=PdRyK5tytCQTOKR1H7O0ggAf4uLoQP9bfQgvmQAjSaIaoifBVG5w9YYcpplNgt7nSbfrFH 6mtOFDidF5UwVoMlP70GxfF6AvmYOIHE1z665biyXFfE81HiSU/s/NSTVPd9HNEb9y5vl3 y+hGrB1tTW8VjBCCrHl15E2BvIUPXLw= Received: from mx-prod-mc-05.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-329-vmK00ZWrP5KUcksXaGW_rg-1; Sun, 03 May 2026 03:37:26 -0400 X-MC-Unique: vmK00ZWrP5KUcksXaGW_rg-1 X-Mimecast-MFC-AGG-ID: vmK00ZWrP5KUcksXaGW_rg_1777793844 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 919B9195608A; Sun, 3 May 2026 07:37:24 +0000 (UTC) Received: from laptop.redhat.com (unknown [10.44.48.25]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AED771800480; Sun, 3 May 2026 07:37:19 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, kvmarm@lists.linux.dev, peter.maydell@linaro.org, richard.henderson@linaro.org, cohuck@redhat.com, sebott@redhat.com, skolothumtho@nvidia.com, philmd@linaro.org Cc: maz@kernel.org, oliver.upton@linux.dev, pbonzini@redhat.com, armbru@redhat.com, berrange@redhat.com, abologna@redhat.com, jdenemar@redhat.com Subject: [PATCH v4 16/17] arm-qmp-cmds: introspection for ID register props Date: Sun, 3 May 2026 09:33:36 +0200 Message-ID: <20260503073541.790215-17-eric.auger@redhat.com> In-Reply-To: <20260503073541.790215-1-eric.auger@redhat.com> References: <20260503073541.790215-1-eric.auger@redhat.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Mimecast-MFC-PROC-ID: uX35D_Wpd3TF0khZ_4RHPJvNQJchFPlfWwsJ_ZUlqSk_1777793844 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true From: Cornelia Huck Implement the capability to query available ID register values by adding SYSREG_* options and values to the cpu model expansion for the host model, if available. Excerpt: (QEMU) query-cpu-model-expansion type=full model={"name":"host"} {"return": {"model": {"name": "host", "props": {"SYSREG_ID_AA64PFR0_EL1_EL3": 1224979098931106066, "SYSREG_ID_AA64ISAR2_EL1_CLRBHB": 0, ../.. So this allows the upper stack to detect available writable ID regs and the "host passthrough model" values. [CH: moved SYSREG_* values to host model] Signed-off-by: Eric Auger Signed-off-by: Cornelia Huck --- TODO: Add the moment there is no way to test changing a given ID reg field value. ie: (QEMU) query-cpu-model-expansion type=full model={"name":"host", "prop":{"SYSREG_ID_AA64ISAR0_EL1_DP":0x13}} --- target/arm/arm-qmp-cmds.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/target/arm/arm-qmp-cmds.c b/target/arm/arm-qmp-cmds.c index 83ec95c290..ea8c541a00 100644 --- a/target/arm/arm-qmp-cmds.c +++ b/target/arm/arm-qmp-cmds.c @@ -21,6 +21,7 @@ */ #include "qemu/osdep.h" +#include "qemu/error-report.h" #include "qemu/target-info.h" #include "hw/core/boards.h" #include "kvm_arm.h" @@ -190,6 +191,24 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type, } } + /* If writable ID regs are supported, add them as well */ + if (ARM_CPU(obj)->writable_id_regs_status == WRITABLE_ID_REGS_AVAIL) { + ObjectProperty *prop; + ObjectPropertyIterator iter; + + object_property_iter_init(&iter, obj); + + while ((prop = object_property_iter_next(&iter))) { + QObject *value; + + if (!g_str_has_prefix(prop->name, "SYSREG_")) { + continue; + } + value = object_property_get_qobject(obj, prop->name, &error_abort); + qdict_put_obj(qdict_out, prop->name, value); + } + } + if (!qdict_size(qdict_out)) { qobject_unref(qdict_out); } else { -- 2.53.0