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[72.137.123.47]) by smtp.gmail.com with ESMTPSA id h8sm1900079qtm.51.2020.02.26.14.55.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Feb 2020 14:55:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582757725; 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=67BJoWVgjqRaE3ez8MIcs6ZgskV92ME7JrNNMKV0joI=; b=jOwlRKJQ9hBHfuLgsT7kA3f8Te6ygCGhtQkXH/WZeSZe8Qg/bJ6qSRNFPLDQx8F0oaHiPU +NrlpiJxD5B4kb50kTFPSLitG5gn6kZnGPBvqMxBW3oeTyNv0yo9vSPGLUpDnZ/FxtXBNd InwGc9eyGlJBW+ZCqK4QtECO0ObKUrI= X-MC-Unique: Mc33v0rKNwK323RnR6zRWQ-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=wQ1AClskklPLaQx5THQ8KFrAAijnqVsY12r4IQjRE6M=; b=pVWwXZXVYT/3P5VrnjIbcAv86PK6XFAgO7RrpQ51vyuc2kGAy6QqMYqM5ZTamU0D/0 0qaUlGCtcvz8gCgOv0Or1HVv3Qm7DnK2PjnnJRyBOwu6syOfuP0hjv4t5UFf7F5lf9GE YiuhApdddMGF09+XPdoUsD85LbhBRnQ+LzU0c9Z+IFAa0bjGMayWEABRruXsvvPmQxr3 17CXi22KqxN31nL6RnU5j9SwfyF3XFXWde8CUkFAW0dpnlRrHX/5L4L60C1myAbe1GlU TGVYW6uNu/nj7CvDjErs3Hcw+iTcfqAwDs7CYBLozFBeY3eC9zhGfCplJ+Fi3W/xqgYh n1BQ== X-Gm-Message-State: APjAAAV9IqHuI2c72pfd4k/yHSYHwDLOImLIJeuXLk13xjkcGg6eU5OP cal1t/slJtNzGel1llFUyEvsMevAl2LXJMx15V1SL05UDpcFw2gjkuz00f740vxm2MmZyPimli0 O6s8/mPfI2LegMC8= X-Received: by 2002:a37:ba05:: with SMTP id k5mr1834147qkf.257.1582757721826; Wed, 26 Feb 2020 14:55:21 -0800 (PST) X-Google-Smtp-Source: APXvYqxF+juToEgr9MqlCHQQhjmSwzaOaycUbCGOItKyT6fJZXQQMn4EzJPcbVw19kURPqLv3JA+TA== X-Received: by 2002:a37:ba05:: with SMTP id k5mr1834127qkf.257.1582757721603; Wed, 26 Feb 2020 14:55:21 -0800 (PST) From: Peter Xu To: qemu-devel@nongnu.org Subject: [PATCH 5/5] Revert "vfio/pci: Disable INTx fast path if using split irqchip" Date: Wed, 26 Feb 2020 17:55:18 -0500 Message-Id: <20200226225518.217138-1-peterx@redhat.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200226225048.216508-1-peterx@redhat.com> References: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eric Auger , Alex Williamson , Cornelia Huck , Peter Xu , Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" With the resamplefd list introduced, we can savely enable VFIO INTx fast path again with split irqchip so it can still be faster than the complete slow path. Signed-off-by: Peter Xu --- hw/vfio/pci.c | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 09703362df..1c0aa27386 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -124,18 +124,6 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev, = Error **errp) return; } =20 - if (kvm_irqchip_is_split()) { - /* - * VFIO INTx is currently not working with split kernel - * irqchip for level triggered interrupts. Go the slow path - * as long as split is enabled so we can be at least - * functional (even with poor performance). - * - * TODO: Remove this after all things fixed up. - */ - return; - } - /* Get to a known interrupt state */ qemu_set_fd_handler(irq_fd, NULL, NULL, vdev); vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX); --=20 2.24.1