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=-9.8 required=3.0 tests=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 8865EC432C3 for ; Fri, 15 Nov 2019 16:29:32 +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 5C01920740 for ; Fri, 15 Nov 2019 16:29:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5C01920740 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kaod.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:41534 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVeTS-00043Y-PF for qemu-devel@archiver.kernel.org; Fri, 15 Nov 2019 11:29:30 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51845) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVeP4-0007KH-Pj for qemu-devel@nongnu.org; Fri, 15 Nov 2019 11:24:59 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iVeP3-0000Wf-Jg for qemu-devel@nongnu.org; Fri, 15 Nov 2019 11:24:58 -0500 Received: from 13.mo4.mail-out.ovh.net ([178.33.251.8]:49128) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iVeP3-0000WK-DM for qemu-devel@nongnu.org; Fri, 15 Nov 2019 11:24:57 -0500 Received: from player787.ha.ovh.net (unknown [10.108.57.23]) by mo4.mail-out.ovh.net (Postfix) with ESMTP id 7891C2131B4 for ; Fri, 15 Nov 2019 17:24:55 +0100 (CET) Received: from kaod.org (lfbn-1-2229-223.w90-76.abo.wanadoo.fr [90.76.50.223]) (Authenticated sender: clg@kaod.org) by player787.ha.ovh.net (Postfix) with ESMTPSA id 9DDA0C444620; Fri, 15 Nov 2019 16:24:49 +0000 (UTC) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: David Gibson Subject: [PATCH for-5.0 v5 01/23] ppc/xive: Record the IPB in the associated NVT Date: Fri, 15 Nov 2019 17:24:14 +0100 Message-Id: <20191115162436.30548-2-clg@kaod.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191115162436.30548-1-clg@kaod.org> References: <20191115162436.30548-1-clg@kaod.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Ovh-Tracer-Id: 15084525479042255846 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedufedrudefhedgkeekucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdqfffguegfifdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvufffkffojghfgggtgfesthekredtredtjeenucfhrhhomhepveorughrihgtucfnvgcuifhorghtvghruceotghlgheskhgrohgurdhorhhgqeenucfkpheptddrtddrtddrtddpledtrdejiedrhedtrddvvdefnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehplhgrhigvrhejkeejrdhhrgdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomheptghlgheskhgrohgurdhorhhgpdhrtghpthhtohepqhgvmhhuqdguvghvvghlsehnohhnghhnuhdrohhrghenucevlhhushhtvghrufhiiigvpedt Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 178.33.251.8 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: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , qemu-ppc@nongnu.org, Greg Kurz , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When an interrupt can not be presented to a vCPU, because it is not running on any of the HW treads, the XIVE presenter updates the Interrupt Pending Buffer register of the associated XIVE NVT structure. This is only done if backlog is activated in the END but this is generally the case. The current code assumes that the fields of the NVT structure is architected with the same layout of the thread interrupt context registers. Fix this assumption and define an offset for the IPB register backup value in the NVT. Signed-off-by: C=C3=A9dric Le Goater --- include/hw/ppc/xive_regs.h | 1 + hw/intc/xive.c | 11 +++++++++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/include/hw/ppc/xive_regs.h b/include/hw/ppc/xive_regs.h index 55307cd1533c..530f232b04f8 100644 --- a/include/hw/ppc/xive_regs.h +++ b/include/hw/ppc/xive_regs.h @@ -255,6 +255,7 @@ typedef struct XiveNVT { uint32_t w2; uint32_t w3; uint32_t w4; +#define NVT_W4_IPB PPC_BITMASK32(16, 23) uint32_t w5; uint32_t w6; uint32_t w7; diff --git a/hw/intc/xive.c b/hw/intc/xive.c index 3d472e29c858..177663d2b43e 100644 --- a/hw/intc/xive.c +++ b/hw/intc/xive.c @@ -1607,14 +1607,21 @@ static void xive_router_end_notify(XiveRouter *xr= tr, uint8_t end_blk, * - logical server : forward request to IVPE (not supported) */ if (xive_end_is_backlog(&end)) { + uint8_t ipb; + if (format =3D=3D 1) { qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x invalid config: F1 & backlog\= n", end_blk, end_idx); return; } - /* Record the IPB in the associated NVT structure */ - ipb_update((uint8_t *) &nvt.w4, priority); + /* + * Record the IPB in the associated NVT structure for later + * use. The presenter will resend the interrupt when the vCPU + * is dispatched again on a HW thread. + */ + ipb =3D xive_get_field32(NVT_W4_IPB, nvt.w4) | priority_to_ipb(p= riority); + nvt.w4 =3D xive_set_field32(NVT_W4_IPB, nvt.w4, ipb); xive_router_write_nvt(xrtr, nvt_blk, nvt_idx, &nvt, 4); =20 /* --=20 2.21.0