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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 1F8D8C4332B for ; Fri, 20 Mar 2020 18:25:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA96B2078B for ; Fri, 20 Mar 2020 18:25:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584728717; bh=N3wwRec9eX3tvnTFhlfc0Z6Er175VJYA27eqwFuKldg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=z3f2NMsqax18l0aLpjQM9PoxxTBhF0aW+bpenihUoA/I8ay0Hsb1S47+GxE0EWY5e xlfitZLl1Tcq1EILcX3ZPO+PBmdfpLwR9QiXwZRKwqNMeXmDLpPZfECZ15tvoWH26+ kt2hj+Qj7I22kVWKJO6iYd7iTjcmnUOryYvlEmgA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727497AbgCTSZK (ORCPT ); Fri, 20 Mar 2020 14:25:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:35788 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727253AbgCTSYi (ORCPT ); Fri, 20 Mar 2020 14:24:38 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4277E20788; Fri, 20 Mar 2020 18:24:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584728677; bh=N3wwRec9eX3tvnTFhlfc0Z6Er175VJYA27eqwFuKldg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xfp31hwNNE/SfpKGyvc/e4S2lRxYGh0r4ZlMb0StqNftSUpexwMEkRfwnBRgA7DLq V5q4CYx/8tfniXV5ehE54xNS0NvSzggfYJ5JUvIOMCv1MqJ9ywGQVgSoEDifqTYsA0 0qmsK7LTRbNRT9Jp1SMNZYJmeE02dHJuWCQP0oh8= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jFMJv-00EKAx-Gr; Fri, 20 Mar 2020 18:24:35 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lorenzo Pieralisi , Jason Cooper , Thomas Gleixner , Zenghui Yu , Eric Auger , James Morse , Julien Thierry , Suzuki K Poulose Subject: [PATCH v6 04/23] irqchip/gic-v4.1: Wait for completion of redistributor's INVALL operation Date: Fri, 20 Mar 2020 18:23:47 +0000 Message-Id: <20200320182406.23465-5-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200320182406.23465-1-maz@kernel.org> References: <20200320182406.23465-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.pieralisi@arm.com, jason@lakedaemon.net, tglx@linutronix.de, yuzenghui@huawei.com, eric.auger@redhat.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Zenghui Yu In GICv4.1, we emulate a guest-issued INVALL command by a direct write to GICR_INVALLR. Before we finish the emulation and go back to guest, let's make sure the physical invalidate operation is actually completed and no stale data will be left in redistributor. Per the specification, this can be achieved by polling the GICR_SYNCR.Busy bit (to zero). Signed-off-by: Zenghui Yu Signed-off-by: Marc Zyngier Reviewed-by: Eric Auger Link: https://lore.kernel.org/r/20200302092145.899-1-yuzenghui@huawei.com Link: https://lore.kernel.org/r/20200304203330.4967-5-maz@kernel.org --- drivers/irqchip/irq-gic-v3-its.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 1af713990123..c84370245bea 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -3827,6 +3827,8 @@ static void its_vpe_4_1_invall(struct its_vpe *vpe) /* Target the redistributor this vPE is currently known on */ rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; gic_write_lpir(val, rdbase + GICR_INVALLR); + + wait_for_syncr(rdbase); } static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) -- 2.20.1