From patchwork Mon Apr 4 09:33:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Kardashevskiy X-Patchwork-Id: 605784 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qdn1V31G0z9s3T for ; Mon, 4 Apr 2016 19:36:30 +1000 (AEST) Received: from localhost ([::1]:57506 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1an0vr-00028V-Nc for incoming@patchwork.ozlabs.org; Mon, 04 Apr 2016 05:36:27 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44679) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1an0uu-0000Ma-U4 for qemu-devel@nongnu.org; Mon, 04 Apr 2016 05:35:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1an0ut-0000YM-8u for qemu-devel@nongnu.org; Mon, 04 Apr 2016 05:35:28 -0400 Received: from e23smtp02.au.ibm.com ([202.81.31.144]:60902) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1an0us-0000XP-E6 for qemu-devel@nongnu.org; Mon, 04 Apr 2016 05:35:26 -0400 Received: from localhost by e23smtp02.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 4 Apr 2016 19:35:22 +1000 X-IBM-Helo: d23dlp01.au.ibm.com X-IBM-MailFrom: aik@ozlabs.ru X-IBM-RcptTo: qemu-devel@nongnu.org;qemu-ppc@nongnu.org Received: from d23relay08.au.ibm.com (d23relay08.au.ibm.com [9.185.71.33]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id 8D6F92CE8056; Mon, 4 Apr 2016 19:35:14 +1000 (EST) Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay08.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u349Z6Q846530780; Mon, 4 Apr 2016 19:35:14 +1000 Received: from d23av04.au.ibm.com (localhost [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u349YgjO013660; Mon, 4 Apr 2016 19:34:42 +1000 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.192.253.14]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u349Yfdc012595; Mon, 4 Apr 2016 19:34:42 +1000 Received: from bran.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) by ozlabs.au.ibm.com (Postfix) with ESMTP id 22304A03B4; Mon, 4 Apr 2016 19:33:53 +1000 (AEST) Received: from vpl2.ozlabs.ibm.com (vpl2.ozlabs.ibm.com [10.61.141.27]) by bran.ozlabs.ibm.com (Postfix) with ESMTP id 1C6F6E3A0D; Mon, 4 Apr 2016 19:33:53 +1000 (AEST) From: Alexey Kardashevskiy To: qemu-devel@nongnu.org Date: Mon, 4 Apr 2016 19:33:42 +1000 Message-Id: <1459762426-18440-14-git-send-email-aik@ozlabs.ru> X-Mailer: git-send-email 2.5.0.rc3 In-Reply-To: <1459762426-18440-1-git-send-email-aik@ozlabs.ru> References: <1459762426-18440-1-git-send-email-aik@ozlabs.ru> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16040409-0005-0000-0000-0000073F25C1 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 202.81.31.144 Cc: Alexey Kardashevskiy , Alex Williamson , qemu-ppc@nongnu.org, Alexander Graf , David Gibson Subject: [Qemu-devel] [PATCH qemu v15 13/17] vfio: Add host side DMA window capabilities X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org There are going to be multiple IOMMUs per a container. This moves the single host IOMMU parameter set to a list of VFIOHostIOMMU. This should cause no behavioral change and will be used later by the SPAPR TCE IOMMU v2 which will also add a vfio_host_iommu_del() helper. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson --- Changes: v15: * s/vfio_host_iommu_add/vfio_host_win_add/ * s/VFIOHostIOMMU/VFIOHostDMAWindow/ --- hw/vfio/common.c | 65 +++++++++++++++++++++++++++++++++---------- include/hw/vfio/vfio-common.h | 9 ++++-- 2 files changed, 57 insertions(+), 17 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 3e9c579..ea79311 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -29,6 +29,7 @@ #include "exec/memory.h" #include "hw/hw.h" #include "qemu/error-report.h" +#include "qemu/range.h" #include "sysemu/kvm.h" #include "trace.h" @@ -239,6 +240,45 @@ static int vfio_dma_map(VFIOContainer *container, hwaddr iova, return -errno; } +static VFIOHostDMAWindow *vfio_host_win_lookup(VFIOContainer *container, + hwaddr min_iova, hwaddr max_iova) +{ + VFIOHostDMAWindow *hostwin; + + QLIST_FOREACH(hostwin, &container->hiommu_list, hiommu_next) { + if (hostwin->min_iova <= min_iova && max_iova <= hostwin->max_iova) { + return hostwin; + } + } + + return NULL; +} + +static int vfio_host_win_add(VFIOContainer *container, + hwaddr min_iova, hwaddr max_iova, + uint64_t iova_pgsizes) +{ + VFIOHostDMAWindow *hostwin; + + QLIST_FOREACH(hostwin, &container->hiommu_list, hiommu_next) { + if (ranges_overlap(min_iova, max_iova - min_iova + 1, + hostwin->min_iova, + hostwin->max_iova - hostwin->min_iova + 1)) { + error_report("%s: Overlapped IOMMU are not enabled", __func__); + return -1; + } + } + + hostwin = g_malloc0(sizeof(*hostwin)); + + hostwin->min_iova = min_iova; + hostwin->max_iova = max_iova; + hostwin->iova_pgsizes = iova_pgsizes; + QLIST_INSERT_HEAD(&container->hiommu_list, hostwin, hiommu_next); + + return 0; +} + static bool vfio_listener_skipped_section(MemoryRegionSection *section) { return (!memory_region_is_ram(section->mr) && @@ -352,7 +392,7 @@ static void vfio_listener_region_add(MemoryListener *listener, } end = int128_get64(llend); - if ((iova < container->min_iova) || ((end - 1) > container->max_iova)) { + if (!vfio_host_win_lookup(container, iova, end - 1)) { error_report("vfio: IOMMU container %p can't map guest IOVA region" " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, container, iova, end - 1); @@ -367,10 +407,6 @@ static void vfio_listener_region_add(MemoryListener *listener, trace_vfio_listener_region_add_iommu(iova, end - 1); /* - * FIXME: We should do some checking to see if the - * capabilities of the host VFIO IOMMU are adequate to model - * the guest IOMMU - * * FIXME: For VFIO iommu types which have KVM acceleration to * avoid bouncing all map/unmaps through qemu this way, this * would be the right place to wire that up (tell the KVM @@ -818,16 +854,14 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) * existing Type1 IOMMUs generally support any IOVA we're * going to actually try in practice. */ - container->min_iova = 0; - container->max_iova = (hwaddr)-1; - - /* Assume just 4K IOVA page size */ - container->iova_pgsizes = 0x1000; info.argsz = sizeof(info); ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info); /* Ignore errors */ if ((ret == 0) && (info.flags & VFIO_IOMMU_INFO_PGSIZES)) { - container->iova_pgsizes = info.iova_pgsizes; + vfio_host_win_add(container, 0, (hwaddr)-1, info.iova_pgsizes); + } else { + /* Assume just 4K IOVA page size */ + vfio_host_win_add(container, 0, (hwaddr)-1, 0x1000); } } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU) || ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU)) { @@ -884,11 +918,12 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) ret = -errno; goto listener_release_exit; } - container->min_iova = info.dma32_window_start; - container->max_iova = container->min_iova + info.dma32_window_size - 1; - /* Assume just 4K IOVA pages for now */ - container->iova_pgsizes = 0x1000; + /* The default table uses 4K pages */ + vfio_host_win_add(container, info.dma32_window_start, + info.dma32_window_start + + info.dma32_window_size - 1, + 0x1000); } else { error_report("vfio: No available IOMMU models"); ret = -EINVAL; diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index c72e45a..8028bb8 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -82,9 +82,8 @@ typedef struct VFIOContainer { * contiguous IOVA window. We may need to generalize that in * future */ - hwaddr min_iova, max_iova; - uint64_t iova_pgsizes; QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; + QLIST_HEAD(, VFIOHostDMAWindow) hiommu_list; QLIST_HEAD(, VFIOGroup) group_list; QLIST_ENTRY(VFIOContainer) next; } VFIOContainer; @@ -97,6 +96,12 @@ typedef struct VFIOGuestIOMMU { QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; } VFIOGuestIOMMU; +typedef struct VFIOHostDMAWindow { + hwaddr min_iova, max_iova; + uint64_t iova_pgsizes; + QLIST_ENTRY(VFIOHostDMAWindow) hiommu_next; +} VFIOHostDMAWindow; + typedef struct VFIODeviceOps VFIODeviceOps; typedef struct VFIODevice {