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 A25BBCA0FED for ; Wed, 10 Sep 2025 14:25:58 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uwLlB-000383-47; Wed, 10 Sep 2025 10:25:21 -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 1uwLl8-00037l-QO for qemu-devel@nongnu.org; Wed, 10 Sep 2025 10:25:18 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uwLl6-00070H-Kt for qemu-devel@nongnu.org; Wed, 10 Sep 2025 10:25:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1757514313; 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=B2K82FTjD2ngCIzEX9ElyP4drQK2Em+tFHR+l3Wud0Y=; b=bbR393ttOKYNrW//tyTqY+2h89lvheqKIpv/m/ow4ODEQFB5wbf7ik4Egm5N1i1zIeJDiX AxCfBnXtThq92Lv3AjL9XcjipcKe8tSU0IKCjY8yGufgM9QPcoTZaIItON7pxvKb42miUI 1eo33gYxtdmNzDEs3BBGmWuBQEvcYwM= 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-93-49rqXEkuNWy54vDf599kNw-1; Wed, 10 Sep 2025 10:25:11 -0400 X-MC-Unique: 49rqXEkuNWy54vDf599kNw-1 X-Mimecast-MFC-AGG-ID: 49rqXEkuNWy54vDf599kNw_1757514310 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 AB4FB19541B0 for ; Wed, 10 Sep 2025 14:25:10 +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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 352B8300018D; Wed, 10 Sep 2025 14:25:08 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Cc: mst@redhat.com, pbonzini@redhat.com, =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Subject: [PATCH] hpet: guard IRQ handling with BQL Date: Wed, 10 Sep 2025 16:25:06 +0200 Message-ID: <20250910142506.86274-1-imammedo@redhat.com> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.129.124; 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 Commit [1] made qemu fail with abort: xen_evtchn_set_gsi: Assertion `bql_locked()' failed. when running ./tests/functional/x86_64/test_kvm_xen.py tests. To fix it make sure that BQL is held when manipulating IRQs. 1) Fixes: 7defb58baf (hpet: switch to fine-grained device locking) Reported-by: Daniel P. Berrangé Signed-off-by: Igor Mammedov --- hw/timer/hpet.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/hw/timer/hpet.c b/hw/timer/hpet.c index 789a31d0a0..1acba4fa9d 100644 --- a/hw/timer/hpet.c +++ b/hw/timer/hpet.c @@ -40,6 +40,7 @@ #include "qom/object.h" #include "qemu/lockable.h" #include "qemu/seqlock.h" +#include "qemu/main-loop.h" #include "trace.h" struct hpet_fw_config hpet_fw_cfg = {.count = UINT8_MAX}; @@ -222,12 +223,15 @@ static void update_irq(struct HPETTimer *timer, int set) timer->fsb & 0xffffffff, MEMTXATTRS_UNSPECIFIED, NULL); } else if (timer->config & HPET_TN_TYPE_LEVEL) { + BQL_LOCK_GUARD(); qemu_irq_raise(s->irqs[route]); } else { + BQL_LOCK_GUARD(); qemu_irq_pulse(s->irqs[route]); } } else { if (!timer_fsb_route(timer)) { + BQL_LOCK_GUARD(); qemu_irq_lower(s->irqs[route]); } } @@ -534,10 +538,12 @@ static void hpet_ram_write(void *opaque, hwaddr addr, /* i8254 and RTC output pins are disabled * when HPET is in legacy mode */ if (activating_bit(old_val, new_val, HPET_CFG_LEGACY)) { + BQL_LOCK_GUARD(); qemu_set_irq(s->pit_enabled, 0); qemu_irq_lower(s->irqs[0]); qemu_irq_lower(s->irqs[RTC_ISA_IRQ]); } else if (deactivating_bit(old_val, new_val, HPET_CFG_LEGACY)) { + BQL_LOCK_GUARD(); qemu_irq_lower(s->irqs[0]); qemu_set_irq(s->pit_enabled, 1); qemu_set_irq(s->irqs[RTC_ISA_IRQ], s->rtc_irq_level); @@ -683,11 +689,13 @@ static void hpet_handle_legacy_irq(void *opaque, int n, int level) if (n == HPET_LEGACY_PIT_INT) { if (!hpet_in_legacy_mode(s)) { + BQL_LOCK_GUARD(); qemu_set_irq(s->irqs[0], level); } } else { s->rtc_irq_level = level; if (!hpet_in_legacy_mode(s)) { + BQL_LOCK_GUARD(); qemu_set_irq(s->irqs[RTC_ISA_IRQ], level); } } -- 2.47.3