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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A837C433FE for ; Thu, 9 Dec 2021 22:09:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231400AbhLIWMw (ORCPT ); Thu, 9 Dec 2021 17:12:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231253AbhLIWMv (ORCPT ); Thu, 9 Dec 2021 17:12:51 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 651B0C0617A1 for ; Thu, 9 Dec 2021 14:09:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=P6f35iHkW27bYKrXKVfssYuF4aX8DsMoePwrZGh388Y=; b=QFa5QICMSxxiDRr8Beg7VYfEAv p/DL6z6HrvRONhadMeoMETfekFz9AqCkTnmenSpp+Ux4r+8g7TFUvQSQhMnj+vGkjk+A/IAA6S+EE XUAN6akFNVm/0Kz118EXnIGBPwgDbSwlo+7RdRQZ5aYwFWzqdK0+mlZLF+Q0KgKAVp3w473P2nZh+ sxoBBlKKukb+0LR9j5k53fyt8//2JvjC/WNzVLxgCyADH3dEUcUjqfe2HzuKAJGvUgyLrhWKjAfXi o1cW6D21kV9tqjLQUKHE9qbQ1kdop9T4k6dJdjcCpheZVJrZCOx5uDo65hAAN9LHlD5Nr5o4dmrQz Vj+QKFsw==; Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvRaj-000RNf-B2; Thu, 09 Dec 2021 22:08:50 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvRaj-0003sx-0h; Thu, 09 Dec 2021 22:08:41 +0000 From: David Woodhouse To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Peter Xu , Jason Wang , Paolo Bonzini , Richard Henderson , Eduardo Habkost , Marcel Apfelbaum , Marcelo Tosatti , kvm@vger.kernel.org Subject: [PATCH v2 2/4] intel_iommu: Support IR-only mode without DMA translation Date: Thu, 9 Dec 2021 22:08:38 +0000 Message-Id: <20211209220840.14889-2-dwmw2@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211209220840.14889-1-dwmw2@infradead.org> References: <20211209220840.14889-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: David Woodhouse By setting none of the SAGAW bits we can indicate to a guest that DMA translation isn't supported. Tested by booting Windows 10, as well as Linux guests with the fix at https://git.kernel.org/torvalds/c/c40aaaac10 Signed-off-by: David Woodhouse Acked-by: Claudio Fontana --- hw/i386/intel_iommu.c | 14 ++++++++++---- include/hw/i386/intel_iommu.h | 1 + 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index f584449d8d..9a3cb2b789 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2202,7 +2202,7 @@ static void vtd_handle_gcmd_write(IntelIOMMUState *s) uint32_t changed = status ^ val; trace_vtd_reg_write_gcmd(status, val); - if (changed & VTD_GCMD_TE) { + if ((changed & VTD_GCMD_TE) && s->dma_translation) { /* Translation enable/disable */ vtd_handle_gcmd_te(s, val & VTD_GCMD_TE); } @@ -3100,6 +3100,7 @@ static Property vtd_properties[] = { DEFINE_PROP_BOOL("caching-mode", IntelIOMMUState, caching_mode, FALSE), DEFINE_PROP_BOOL("x-scalable-mode", IntelIOMMUState, scalable_mode, FALSE), DEFINE_PROP_BOOL("dma-drain", IntelIOMMUState, dma_drain, true), + DEFINE_PROP_BOOL("dma-translation", IntelIOMMUState, dma_translation, true), DEFINE_PROP_END_OF_LIST(), }; @@ -3605,12 +3606,17 @@ static void vtd_init(IntelIOMMUState *s) s->next_frcd_reg = 0; s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND | VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS | - VTD_CAP_SAGAW_39bit | VTD_CAP_MGAW(s->aw_bits); + VTD_CAP_MGAW(s->aw_bits); if (s->dma_drain) { s->cap |= VTD_CAP_DRAIN; } - if (s->aw_bits == VTD_HOST_AW_48BIT) { - s->cap |= VTD_CAP_SAGAW_48bit; + if (s->dma_translation) { + if (s->aw_bits >= VTD_HOST_AW_39BIT) { + s->cap |= VTD_CAP_SAGAW_39bit; + } + if (s->aw_bits >= VTD_HOST_AW_48BIT) { + s->cap |= VTD_CAP_SAGAW_48bit; + } } s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO; diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index 41783ee46d..42d6a6a636 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -266,6 +266,7 @@ struct IntelIOMMUState { bool buggy_eim; /* Force buggy EIM unless eim=off */ uint8_t aw_bits; /* Host/IOVA address width (in bits) */ bool dma_drain; /* Whether DMA r/w draining enabled */ + bool dma_translation; /* Whether DMA translation supported */ /* * Protects IOMMU states in general. Currently it protects the -- 2.31.1 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 7FCF1C433EF for ; Thu, 9 Dec 2021 22:42:46 +0000 (UTC) Received: from localhost ([::1]:57718 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mvS7f-0000SZ-Jm for qemu-devel@archiver.kernel.org; Thu, 09 Dec 2021 17:42:45 -0500 Received: from eggs.gnu.org ([209.51.188.92]:33040) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mvRbA-0003rl-Il for qemu-devel@nongnu.org; Thu, 09 Dec 2021 17:09:08 -0500 Received: from desiato.infradead.org ([90.155.92.199]:34184) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mvRb5-0002ca-GV for qemu-devel@nongnu.org; Thu, 09 Dec 2021 17:09:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=P6f35iHkW27bYKrXKVfssYuF4aX8DsMoePwrZGh388Y=; b=QFa5QICMSxxiDRr8Beg7VYfEAv p/DL6z6HrvRONhadMeoMETfekFz9AqCkTnmenSpp+Ux4r+8g7TFUvQSQhMnj+vGkjk+A/IAA6S+EE XUAN6akFNVm/0Kz118EXnIGBPwgDbSwlo+7RdRQZ5aYwFWzqdK0+mlZLF+Q0KgKAVp3w473P2nZh+ sxoBBlKKukb+0LR9j5k53fyt8//2JvjC/WNzVLxgCyADH3dEUcUjqfe2HzuKAJGvUgyLrhWKjAfXi o1cW6D21kV9tqjLQUKHE9qbQ1kdop9T4k6dJdjcCpheZVJrZCOx5uDo65hAAN9LHlD5Nr5o4dmrQz Vj+QKFsw==; Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvRaj-000RNf-B2; Thu, 09 Dec 2021 22:08:50 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvRaj-0003sx-0h; Thu, 09 Dec 2021 22:08:41 +0000 From: David Woodhouse To: qemu-devel@nongnu.org Subject: [PATCH v2 2/4] intel_iommu: Support IR-only mode without DMA translation Date: Thu, 9 Dec 2021 22:08:38 +0000 Message-Id: <20211209220840.14889-2-dwmw2@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211209220840.14889-1-dwmw2@infradead.org> References: <20211209220840.14889-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: none client-ip=90.155.92.199; envelope-from=BATV+7040f1d0de1ffd82a4fb+6682+infradead.org+dwmw2@desiato.srs.infradead.org; helo=desiato.infradead.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001 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: Eduardo Habkost , kvm@vger.kernel.org, "Michael S. Tsirkin" , Jason Wang , Marcelo Tosatti , Richard Henderson , Peter Xu , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: David Woodhouse By setting none of the SAGAW bits we can indicate to a guest that DMA translation isn't supported. Tested by booting Windows 10, as well as Linux guests with the fix at https://git.kernel.org/torvalds/c/c40aaaac10 Signed-off-by: David Woodhouse Acked-by: Claudio Fontana --- hw/i386/intel_iommu.c | 14 ++++++++++---- include/hw/i386/intel_iommu.h | 1 + 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index f584449d8d..9a3cb2b789 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2202,7 +2202,7 @@ static void vtd_handle_gcmd_write(IntelIOMMUState *s) uint32_t changed = status ^ val; trace_vtd_reg_write_gcmd(status, val); - if (changed & VTD_GCMD_TE) { + if ((changed & VTD_GCMD_TE) && s->dma_translation) { /* Translation enable/disable */ vtd_handle_gcmd_te(s, val & VTD_GCMD_TE); } @@ -3100,6 +3100,7 @@ static Property vtd_properties[] = { DEFINE_PROP_BOOL("caching-mode", IntelIOMMUState, caching_mode, FALSE), DEFINE_PROP_BOOL("x-scalable-mode", IntelIOMMUState, scalable_mode, FALSE), DEFINE_PROP_BOOL("dma-drain", IntelIOMMUState, dma_drain, true), + DEFINE_PROP_BOOL("dma-translation", IntelIOMMUState, dma_translation, true), DEFINE_PROP_END_OF_LIST(), }; @@ -3605,12 +3606,17 @@ static void vtd_init(IntelIOMMUState *s) s->next_frcd_reg = 0; s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND | VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS | - VTD_CAP_SAGAW_39bit | VTD_CAP_MGAW(s->aw_bits); + VTD_CAP_MGAW(s->aw_bits); if (s->dma_drain) { s->cap |= VTD_CAP_DRAIN; } - if (s->aw_bits == VTD_HOST_AW_48BIT) { - s->cap |= VTD_CAP_SAGAW_48bit; + if (s->dma_translation) { + if (s->aw_bits >= VTD_HOST_AW_39BIT) { + s->cap |= VTD_CAP_SAGAW_39bit; + } + if (s->aw_bits >= VTD_HOST_AW_48BIT) { + s->cap |= VTD_CAP_SAGAW_48bit; + } } s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO; diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index 41783ee46d..42d6a6a636 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -266,6 +266,7 @@ struct IntelIOMMUState { bool buggy_eim; /* Force buggy EIM unless eim=off */ uint8_t aw_bits; /* Host/IOVA address width (in bits) */ bool dma_drain; /* Whether DMA r/w draining enabled */ + bool dma_translation; /* Whether DMA translation supported */ /* * Protects IOMMU states in general. Currently it protects the -- 2.31.1