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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 7548EC433EF for ; Thu, 17 Mar 2022 08:08:05 +0000 (UTC) Received: from localhost ([::1]:45828 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nUlAy-0004kL-67 for qemu-devel@archiver.kernel.org; Thu, 17 Mar 2022 04:08:04 -0400 Received: from eggs.gnu.org ([209.51.188.92]:50320) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nUl8f-0002nY-Ci for qemu-devel@nongnu.org; Thu, 17 Mar 2022 04:05:44 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:58455) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nUl8d-0002fZ-6n for qemu-devel@nongnu.org; Thu, 17 Mar 2022 04:05:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647504337; 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=WLNtgJ/oB4LM0sahSaf8ZqzSNGy21bHM63tjthX/QcM=; b=IjvFBjssTp6tXcFARJsPyyC9yFiqEaxvVoxVWPmif4UK7Jng8yYokQHh4FnH4wdZI9TKrm zs+RA/L3rYZBZhfkqogY5IC1Qq0M7Pd2dPjfu7rxgp95ic6mTZ0zWVFlbH60+jlt9NdAu4 L7V8gMDKfCFaglujuHJEeS4RNm5WH+M= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-15-dUKnDr92Oy6xQy-TPHanFQ-1; Thu, 17 Mar 2022 04:05:36 -0400 X-MC-Unique: dUKnDr92Oy6xQy-TPHanFQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 70ED5804183 for ; Thu, 17 Mar 2022 08:05:36 +0000 (UTC) Received: from localhost.localdomain (ovpn-14-11.pek2.redhat.com [10.72.14.11]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5A624C23DC5; Thu, 17 Mar 2022 08:05:33 +0000 (UTC) From: Jason Wang To: mst@redhat.com, peterx@redhat.com Subject: [PATCH 2/2] intel-iommu: update iq_dw during post load Date: Thu, 17 Mar 2022 16:05:22 +0800 Message-Id: <20220317080522.14621-2-jasowang@redhat.com> In-Reply-To: <20220317080522.14621-1-jasowang@redhat.com> References: <20220317080522.14621-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=170.10.129.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Cc: Jason Wang , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We need to update iq_dw according to the DMA_IRQ_REG during post load. Otherwise we may get wrong IOTLB invalidation descriptor after migration. Fixes: fb43cf739e ("intel_iommu: scalable mode emulation") Signed-off-by: Jason Wang --- hw/i386/intel_iommu.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index a13cfecfce..c58f603b72 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -181,6 +181,18 @@ static void vtd_update_scalable_state(IntelIOMMUState *s) } } +static void vtd_update_iq_dw(IntelIOMMUState *s) +{ + uint64_t val = vtd_get_quad_raw(s, DMAR_IQA_REG); + + if (s->ecap & VTD_ECAP_SMTS && + val & VTD_IQA_DW_MASK) { + s->iq_dw = true; + } else { + s->iq_dw = false; + } +} + /* Whether the address space needs to notify new mappings */ static inline gboolean vtd_as_has_map_notifier(VTDAddressSpace *as) { @@ -2883,12 +2895,7 @@ static void vtd_mem_write(void *opaque, hwaddr addr, } else { vtd_set_quad(s, addr, val); } - if (s->ecap & VTD_ECAP_SMTS && - val & VTD_IQA_DW_MASK) { - s->iq_dw = true; - } else { - s->iq_dw = false; - } + vtd_update_iq_dw(s); break; case DMAR_IQA_REG_HI: @@ -3061,6 +3068,8 @@ static int vtd_post_load(void *opaque, int version_id) */ vtd_update_scalable_state(iommu); + vtd_update_iq_dw(iommu); + /* * Memory regions are dynamically turned on/off depending on * context entry configurations from the guest. After migration, -- 2.25.1