From nobody Wed Oct 29 12:17:58 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1755187717; cv=none; d=zohomail.com; s=zohoarc; b=U3j9RjvdPY0paiY5f7t/6vu8csv87C50qSnHT31knBxJn25KjmHFlgjxwmEP09Cq3kHLyAeoea4xmmpVkmz+aulDTZ6n0l/+NhuHneiQQF1yxpph4IUvDPsXWa9IzZVbv1LecZznOx9fczzLBRm6p+x/cg96j+nuRtDqxccjts4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1755187717; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=/TjsEiU6idgYODMC5HW9snh3H7FKlCoSoz/xZ8Ri2Fo=; b=RSeiJyJqaxdONrhAqyyZZ21yHk7RiJzUvHIc31lHAK19MUlFnHTQUu4m8inJJV8tp2/0LDIAN1e1XeW2QYNKnCxiiVY8aFK8JQ4IQZPCDFGGxxXMTpC1a4qigf13rVaezD2qhjQGUjixmHoIfnkYE/iFRK0egcEtJHCkYfuMtPA= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1755187717408246.6194369859569; Thu, 14 Aug 2025 09:08:37 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1umaTe-00020A-Fy; Thu, 14 Aug 2025 12:06:54 -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 1umaTc-0001zM-LS for qemu-devel@nongnu.org; Thu, 14 Aug 2025 12:06:52 -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 1umaTR-0005lY-Dj for qemu-devel@nongnu.org; Thu, 14 Aug 2025 12:06:52 -0400 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-231-9AF1w3LWOBmsw_UoIbh7hA-1; Thu, 14 Aug 2025 12:06:35 -0400 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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 726931800446 for ; Thu, 14 Aug 2025 16:06:34 +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-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E53DF180044F; Thu, 14 Aug 2025 16:06:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755187596; 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=/TjsEiU6idgYODMC5HW9snh3H7FKlCoSoz/xZ8Ri2Fo=; b=UA6r+dNSjsCz3iAstyH/kdr4zhUTaefoxdAiUnJkfPb/w2TIzeV5MOCgqlSoU2ZgirDIzo UD1dpXGFMeqcV4TX3YaJJYphaI66YCzyvJ0YiOAVnYeK3j2a5T5taqwITY5/gpNFAAFi8q CCNcS7XP3SI5DYZ3BcLi4W3p7Y/K1Kw= X-MC-Unique: 9AF1w3LWOBmsw_UoIbh7hA-1 X-Mimecast-MFC-AGG-ID: 9AF1w3LWOBmsw_UoIbh7hA_1755187594 From: Igor Mammedov To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Peter Xu , "Michael S. Tsirkin" , mtosatti@redhat.com Subject: [PATCH v4 8/8] tcg: move interrupt caching and single step masking closer to user Date: Thu, 14 Aug 2025 18:06:00 +0200 Message-ID: <20250814160600.2327672-9-imammedo@redhat.com> In-Reply-To: <20250814160600.2327672-1-imammedo@redhat.com> References: <20250814160600.2327672-1-imammedo@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1755187718490116600 in cpu_handle_interrupt() the only place where cached interrupt_request might have effect is when CPU_INTERRUPT_SSTEP_MASK applied and cached interrupt_request handed over to cpu_exec_interrupt() and need_replay_interrupt(). Simplify code by moving interrupt_request caching and CPU_INTERRUPT_SSTEP_M= ASK masking into the block where it actually matters and drop reloading cached = value from CPUState:interrupt_request as the rest of the code directly uses CPUState:interrupt_request. Signed-off-by: Igor Mammedov --- accel/tcg/cpu-exec.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 1269c2c6ba..82867f456c 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -779,13 +779,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, qatomic_set_mb(&cpu->neg.icount_decr.u16.high, 0); =20 if (unlikely(cpu_test_interrupt(cpu, ~0))) { - int interrupt_request; bql_lock(); - interrupt_request =3D cpu->interrupt_request; - if (unlikely(cpu->singlestep_enabled & SSTEP_NOIRQ)) { - /* Mask out external interrupts for this step. */ - interrupt_request &=3D ~CPU_INTERRUPT_SSTEP_MASK; - } if (cpu_test_interrupt(cpu, CPU_INTERRUPT_DEBUG)) { cpu->interrupt_request &=3D ~CPU_INTERRUPT_DEBUG; cpu->exception_index =3D EXCP_DEBUG; @@ -804,6 +798,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, return true; } else { const TCGCPUOps *tcg_ops =3D cpu->cc->tcg_ops; + int interrupt_request =3D cpu->interrupt_request; =20 if (cpu_test_interrupt(cpu, CPU_INTERRUPT_RESET)) { replay_interrupt(); @@ -812,6 +807,11 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, return true; } =20 + if (unlikely(cpu->singlestep_enabled & SSTEP_NOIRQ)) { + /* Mask out external interrupts for this step. */ + interrupt_request &=3D ~CPU_INTERRUPT_SSTEP_MASK; + } + /* * The target hook has 3 exit conditions: * False when the interrupt isn't processed, @@ -836,9 +836,6 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, cpu->exception_index =3D -1; *last_tb =3D NULL; } - /* The target hook may have updated the 'cpu->interrupt_reques= t'; - * reload the 'interrupt_request' value */ - interrupt_request =3D cpu->interrupt_request; } #endif /* !CONFIG_USER_ONLY */ if (cpu_test_interrupt(cpu, CPU_INTERRUPT_EXITTB)) { --=20 2.47.1