From patchwork Mon Aug 28 16:48:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Maciej S. Szmigiero" X-Patchwork-Id: 13368141 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4ECC5C83F12 for ; Mon, 28 Aug 2023 16:50:03 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qafQR-0000Ac-Tf; Mon, 28 Aug 2023 12:49:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qafQP-0000AE-LT for qemu-devel@nongnu.org; Mon, 28 Aug 2023 12:49:13 -0400 Received: from vps-vb.mhejs.net ([37.28.154.113]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qafQN-0000DT-Ax for qemu-devel@nongnu.org; Mon, 28 Aug 2023 12:49:13 -0400 Received: from MUA by vps-vb.mhejs.net with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qafQG-0000hb-NG; Mon, 28 Aug 2023 18:49:04 +0200 From: "Maciej S. Szmigiero" To: Paolo Bonzini , Richard Henderson , Eduardo Habkost , David Hildenbrand Cc: "Michael S . Tsirkin" , Marcel Apfelbaum , =?utf-8?q?Alex_Benn=C3=A9e?= , Thomas Huth , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , =?utf-8?q?Phil?= =?utf-8?q?ippe_Mathieu-Daud=C3=A9?= , Eric Blake , Markus Armbruster , qemu-devel@nongnu.org Subject: [PATCH v7 6/7] qapi: Add HV_BALLOON_STATUS_REPORT event and its QMP query command Date: Mon, 28 Aug 2023 18:48:23 +0200 Message-ID: <03f58582c27a729ab305f8337ca2d2b8034bdd3b.1693240836.git.maciej.szmigiero@oracle.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=37.28.154.113; envelope-from=mail@maciej.szmigiero.name; helo=vps-vb.mhejs.net X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: "Maciej S. Szmigiero" Used by the hv-balloon driver for (optional) guest memory status reports. Signed-off-by: Maciej S. Szmigiero --- hw/hyperv/hv-balloon.c | 31 +++++++++++++++++++- monitor/monitor.c | 1 + qapi/machine.json | 64 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 95 insertions(+), 1 deletion(-) diff --git a/hw/hyperv/hv-balloon.c b/hw/hyperv/hv-balloon.c index c384f23a3b5e..d3f24721248a 100644 --- a/hw/hyperv/hv-balloon.c +++ b/hw/hyperv/hv-balloon.c @@ -1099,7 +1099,36 @@ static void hv_balloon_handle_status_report(HvBalloon *balloon, balloon->status_report.available *= HV_BALLOON_PAGE_SIZE; balloon->status_report.received = true; - /* report event */ + qapi_event_send_hv_balloon_status_report(balloon->status_report.committed, + balloon->status_report.available); +} + +HvBalloonInfo *qmp_query_hv_balloon_status_report(Error **errp) +{ + HvBalloon *balloon; + HvBalloonInfo *info; + + balloon = HV_BALLOON(object_resolve_path_type("", TYPE_HV_BALLOON, NULL)); + if (!balloon) { + error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, + "no %s device present", TYPE_HV_BALLOON); + return NULL; + } + + if (!balloon->status_report.enabled) { + error_setg(errp, "guest memory status reporting not enabled"); + return NULL; + } + + if (!balloon->status_report.received) { + error_setg(errp, "no guest memory status report received yet"); + return NULL; + } + + info = g_malloc0(sizeof(*info)); + info->committed = balloon->status_report.committed; + info->available = balloon->status_report.available; + return info; } static void hv_balloon_handle_unballoon_response(HvBalloon *balloon, diff --git a/monitor/monitor.c b/monitor/monitor.c index dc352f9e9d95..81513c642691 100644 --- a/monitor/monitor.c +++ b/monitor/monitor.c @@ -315,6 +315,7 @@ static MonitorQAPIEventConf monitor_qapi_event_conf[QAPI_EVENT__MAX] = { [QAPI_EVENT_QUORUM_FAILURE] = { 1000 * SCALE_MS }, [QAPI_EVENT_VSERPORT_CHANGE] = { 1000 * SCALE_MS }, [QAPI_EVENT_MEMORY_DEVICE_SIZE_CHANGE] = { 1000 * SCALE_MS }, + [QAPI_EVENT_HV_BALLOON_STATUS_REPORT] = { 1000 * SCALE_MS }, }; /* diff --git a/qapi/machine.json b/qapi/machine.json index 5ede977cf2bc..f592876964af 100644 --- a/qapi/machine.json +++ b/qapi/machine.json @@ -1113,6 +1113,70 @@ { 'event': 'BALLOON_CHANGE', 'data': { 'actual': 'int' } } +## +# @HvBalloonInfo: +# +# hv-balloon guest-provided memory status information. +# +# @committed: the amount of memory in use inside the guest plus the +# amount of the memory unusable inside the guest (ballooned out, +# offline, etc.) +# +# @available: the amount of the memory inside the guest available for +# new allocations ("free") +# +# Since: 8.2 +## +{ 'struct': 'HvBalloonInfo', 'data': { 'committed': 'size', 'available': 'size' } } + +## +# @query-hv-balloon-status-report: +# +# Returns the hv-balloon driver data contained in the last received "STATUS" +# message from the guest. +# +# Returns: +# - @HvBalloonInfo on success +# - If no hv-balloon device is present, DeviceNotFound +# - If guest memory status reporting not enabled or no guest memory status +# report received yet, GenericError +# +# Since: 8.2 +# +# Example: +# +# -> { "execute": "query-hv-balloon-status-report" } +# <- { "return": { +# "committed": 816640000, +# "available": 3333054464 +# } +# } +## +{ 'command': 'query-hv-balloon-status-report', 'returns': 'HvBalloonInfo' } + +## +# @HV_BALLOON_STATUS_REPORT: +# +# Emitted when the hv-balloon driver receives a "STATUS" message from +# the guest. +# +# @data - a @HvBalloonInfo equivalent to the one returned by the +# 'query-hv-balloon-status-report' command. +# +# Note: this event is rate-limited. +# +# Since: 8.2 +# +# Example: +# +# <- { "event": "HV_BALLOON_STATUS_REPORT", +# "data": { "committed": 816640000, "available": 3333054464 }, +# "timestamp": { "seconds": 1600295492, "microseconds": 661044 } } +# +## +{ 'event': 'HV_BALLOON_STATUS_REPORT', + 'data': 'HvBalloonInfo' } + ## # @MemoryInfo: #