From mboxrd@z Thu Jan 1 00:00:00 1970 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 A2DFCC87FD2 for ; Fri, 8 Aug 2025 12:04:13 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ukLnT-0003cF-15; Fri, 08 Aug 2025 08:02:07 -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 1ukLnJ-0002v1-07 for qemu-devel@nongnu.org; Fri, 08 Aug 2025 08:01:57 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ukLnE-00076J-U8 for qemu-devel@nongnu.org; Fri, 08 Aug 2025 08:01:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1754654510; 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=VRDAzl4q6o2ZOj98CGNsHZ+fXsoqdX1zXUVWLEyK8NA=; b=FoEueTarxXvj6lPULzrMLJDf6k3cgdoNA7o00t+GDnH2OaXUmda3ZGc1B0xT5YxVLfpm2R tp2U4h3PRkGmw8vmu4f9GMP7gDmRvqq7gYAI8K03QRFxqtypy/qI+AXqT0c49ByaVLrzFi Ij7fMxrIzhJfLy3MHLC13/PjZfWcGRc= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-138-Q6tVC_gUOt2CfudKGbnqeA-1; Fri, 08 Aug 2025 08:01:49 -0400 X-MC-Unique: Q6tVC_gUOt2CfudKGbnqeA-1 X-Mimecast-MFC-AGG-ID: Q6tVC_gUOt2CfudKGbnqeA_1754654508 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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 8BBA518002CE; Fri, 8 Aug 2025 12:01:48 +0000 (UTC) Received: from dell-r430-03.lab.eng.brq2.redhat.com (dell-r430-03.lab.eng.brq2.redhat.com [10.37.153.18]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 851B519560AD; Fri, 8 Aug 2025 12:01:46 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Cc: mst@redhat.com, pbonzini@redhat.com, peterx@redhat.com, david@redhat.com, philmd@linaro.org, mtosatti@redhat.com Subject: [PATCH v3 02/10] acpi: mark PMTIMER as unlocked Date: Fri, 8 Aug 2025 14:01:29 +0200 Message-ID: <20250808120137.2208800-3-imammedo@redhat.com> In-Reply-To: <20250808120137.2208800-1-imammedo@redhat.com> References: <20250808120137.2208800-1-imammedo@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.133.124; envelope-from=imammedo@redhat.com; helo=us-smtp-delivery-124.mimecast.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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-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 Reading QEMU_CLOCK_VIRTUAL is thread-safe, write access is NOP. This makes possible to boot Windows with large vCPUs count when hv-time is not used. Reproducer: -M q35,hpet=off -cpu host -enable-kvm -smp 240,sockets=4 -m 8G WS2025.img fails to boot within 30min. With this fix it boots within 2-1min. Signed-off-by: Igor Mammedov --- hw/acpi/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/acpi/core.c b/hw/acpi/core.c index 58f8964e13..ff16582803 100644 --- a/hw/acpi/core.c +++ b/hw/acpi/core.c @@ -547,6 +547,7 @@ void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci, ar->tmr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, acpi_pm_tmr_timer, ar); memory_region_init_io(&ar->tmr.io, memory_region_owner(parent), &acpi_pm_tmr_ops, ar, "acpi-tmr", 4); + memory_region_enable_lockless_io(&ar->tmr.io); memory_region_add_subregion(parent, 8, &ar->tmr.io); } -- 2.47.1