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 X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB5C8C3A59E for ; Wed, 21 Aug 2019 08:00:43 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id AADD722D6D for ; Wed, 21 Aug 2019 08:00:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="aoIxHV/d" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AADD722D6D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44784 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i0LXu-0003xP-Cs for qemu-devel@archiver.kernel.org; Wed, 21 Aug 2019 04:00:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42586) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i0L0q-0005Bg-35 for qemu-devel@nongnu.org; Wed, 21 Aug 2019 03:26:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i0L0o-0008S5-AZ for qemu-devel@nongnu.org; Wed, 21 Aug 2019 03:26:31 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:60269) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i0L0n-00087E-Qv; Wed, 21 Aug 2019 03:26:30 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 46CzjF0wFdz9sQw; Wed, 21 Aug 2019 17:25:50 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1566372353; bh=hIig2nTissNaV4C54zIncxf4ubr2zTLoxwEtdCEGU1I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aoIxHV/dADnQFl6QGTRf0DrVbigzQcJ9auJGeHn7V+KZ1/UrxH8awG2I/F0pAdUl+ zmlRLRwxeD6qWV50JoEyQvVCqbJJ6MNMz59ke+itpg46MQzlkX5H7OjC5pZAMeLwot GRq/YKvKZFE1fzHojRu3aiCWKbxtzyubLC/ufwsc= From: David Gibson To: peter.maydell@linaro.org Date: Wed, 21 Aug 2019 17:25:25 +1000 Message-Id: <20190821072542.23090-26-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190821072542.23090-1-david@gibson.dropbear.id.au> References: <20190821072542.23090-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 Subject: [Qemu-devel] [PULL 25/42] ppc/xive: Provide escalation support 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: lvivier@redhat.com, aik@ozlabs.ru, qemu-devel@nongnu.org, groug@kaod.org, qemu-ppc@nongnu.org, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: C=C3=A9dric Le Goater If the XIVE presenter can not find the NVT dispatched on any of the HW threads, it can not deliver the interrupt. XIVE offers an escalation mechanism to handle such scenarios and inform the hypervisor that an action should be taken. Escalation is configured by setting the 'e' bit and the EAS in word 4 & 5 to let the HW look for the escalation END on which to trigger a new event. Signed-off-by: C=C3=A9dric Le Goater Message-Id: <20190718115420.19919-6-clg@kaod.org> Signed-off-by: David Gibson --- hw/intc/xive.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/hw/intc/xive.c b/hw/intc/xive.c index f27b4e3328..12f0d09df6 100644 --- a/hw/intc/xive.c +++ b/hw/intc/xive.c @@ -1549,6 +1549,22 @@ static void xive_router_end_notify(XiveRouter *xrt= r, uint8_t end_blk, * On HW, follows a "Broadcast Backlog" to IVPEs */ } + + /* + * If activated, escalate notification using the ESe PQ bits and + * the EAS in w4-5 + */ + if (!xive_end_is_escalate(&end)) { + return; + } + + /* + * The END trigger becomes an Escalation trigger + */ + xive_router_end_notify(xrtr, + xive_get_field32(END_W4_ESC_END_BLOCK, end.w4= ), + xive_get_field32(END_W4_ESC_END_INDEX, end.w4= ), + xive_get_field32(END_W5_ESC_END_DATA, end.w5= )); } =20 void xive_router_notify(XiveNotifier *xn, uint32_t lisn) --=20 2.21.0