From patchwork Fri Sep 8 07:14:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 13377199 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 45C0DEE57DA for ; Fri, 8 Sep 2023 07:15:50 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qeVhd-0003s3-Vl; Fri, 08 Sep 2023 03:14:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qeVhc-0003rk-Iu for qemu-devel@nongnu.org; Fri, 08 Sep 2023 03:14:52 -0400 Received: from mail.ozlabs.org ([2404:9400:2221:ea00::3] helo=gandalf.ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qeVhZ-00030d-M3 for qemu-devel@nongnu.org; Fri, 08 Sep 2023 03:14:52 -0400 Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4RhnRm2qYFz4xFR; Fri, 8 Sep 2023 17:14:44 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4RhnRk1l5Xz4x5l; Fri, 8 Sep 2023 17:14:41 +1000 (AEST) From: =?utf-8?q?C=C3=A9dric_Le_Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , Avihai Horon , Gerd Hoffmann , Joao Martins , =?utf-8?q?C=C3=A9dric_Le_Goater?= Subject: [RFC PATCH] vfio/common: Separate vfio-pci ranges Date: Fri, 8 Sep 2023 09:14:38 +0200 Message-ID: <20230908071438.86136-1-clg@redhat.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Received-SPF: pass client-ip=2404:9400:2221:ea00::3; envelope-from=SRS0=UKRc=EY=redhat.com=clg@ozlabs.org; helo=gandalf.ozlabs.org X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Joao Martins QEMU computes the DMA logging ranges for two predefined ranges: 32-bit and 64-bit. In the OVMF case, when the dynamic MMIO window is enabled, QEMU includes in the 64-bit range the RAM regions at the lower part and vfio-pci device RAM regions which are at the top of the address space. This range contains a large gap and the size can be bigger than the dirty tracking HW limits of some devices (MLX5 has a 2^42 limit). To avoid such large ranges, introduce a new PCI range covering the vfio-pci device RAM regions, this only if the addresses are above 4GB to avoid breaking potential SeaBIOS guests. Signed-off-by: Joao Martins [ clg: - wrote commit log - fixed overlapping 32-bit and PCI ranges when using SeaBIOS ] Signed-off-by: Cédric Le Goater --- hw/vfio/common.c | 51 +++++++++++++++++++++++++++++++++++++++----- hw/vfio/trace-events | 2 +- 2 files changed, 47 insertions(+), 6 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 237101d03844273f653d98b6d053a1ae9c05a247..a5548e3bebf999e6d9cef08bdaf1fbc3b437e5eb 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -27,6 +27,7 @@ #include "hw/vfio/vfio-common.h" #include "hw/vfio/vfio.h" +#include "hw/vfio/pci.h" #include "exec/address-spaces.h" #include "exec/memory.h" #include "exec/ram_addr.h" @@ -1400,6 +1401,8 @@ typedef struct VFIODirtyRanges { hwaddr max32; hwaddr min64; hwaddr max64; + hwaddr minpci; + hwaddr maxpci; } VFIODirtyRanges; typedef struct VFIODirtyRangesListener { @@ -1408,6 +1411,31 @@ typedef struct VFIODirtyRangesListener { MemoryListener listener; } VFIODirtyRangesListener; +static bool vfio_section_is_vfio_pci(MemoryRegionSection *section, + VFIOContainer *container) +{ + VFIOPCIDevice *pcidev; + VFIODevice *vbasedev; + VFIOGroup *group; + Object *owner; + + owner = memory_region_owner(section->mr); + + QLIST_FOREACH(group, &container->group_list, container_next) { + QLIST_FOREACH(vbasedev, &group->device_list, next) { + if (vbasedev->type != VFIO_DEVICE_TYPE_PCI) { + continue; + } + pcidev = container_of(vbasedev, VFIOPCIDevice, vbasedev); + if (OBJECT(pcidev) == owner) { + return true; + } + } + } + + return false; +} + static void vfio_dirty_tracking_update(MemoryListener *listener, MemoryRegionSection *section) { @@ -1434,9 +1462,14 @@ static void vfio_dirty_tracking_update(MemoryListener *listener, * would be an IOVATree but that has a much bigger runtime overhead and * unnecessary complexity. */ - min = (end <= UINT32_MAX) ? &range->min32 : &range->min64; - max = (end <= UINT32_MAX) ? &range->max32 : &range->max64; - + if (vfio_section_is_vfio_pci(section, dirty->container) && + iova >= UINT32_MAX) { + min = &range->minpci; + max = &range->maxpci; + } else { + min = (end <= UINT32_MAX) ? &range->min32 : &range->min64; + max = (end <= UINT32_MAX) ? &range->max32 : &range->max64; + } if (*min > iova) { *min = iova; } @@ -1461,6 +1494,7 @@ static void vfio_dirty_tracking_init(VFIOContainer *container, memset(&dirty, 0, sizeof(dirty)); dirty.ranges.min32 = UINT32_MAX; dirty.ranges.min64 = UINT64_MAX; + dirty.ranges.minpci = UINT64_MAX; dirty.listener = vfio_dirty_tracking_listener; dirty.container = container; @@ -1531,7 +1565,8 @@ vfio_device_feature_dma_logging_start_create(VFIOContainer *container, * DMA logging uAPI guarantees to support at least a number of ranges that * fits into a single host kernel base page. */ - control->num_ranges = !!tracking->max32 + !!tracking->max64; + control->num_ranges = !!tracking->max32 + !!tracking->max64 + + !!tracking->maxpci; ranges = g_try_new0(struct vfio_device_feature_dma_logging_range, control->num_ranges); if (!ranges) { @@ -1550,11 +1585,17 @@ vfio_device_feature_dma_logging_start_create(VFIOContainer *container, if (tracking->max64) { ranges->iova = tracking->min64; ranges->length = (tracking->max64 - tracking->min64) + 1; + ranges++; + } + if (tracking->maxpci) { + ranges->iova = tracking->minpci; + ranges->length = (tracking->maxpci - tracking->minpci) + 1; } trace_vfio_device_dirty_tracking_start(control->num_ranges, tracking->min32, tracking->max32, - tracking->min64, tracking->max64); + tracking->min64, tracking->max64, + tracking->minpci, tracking->maxpci); return feature; } diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index ce61b10827b6a1203a5fe1a87a76d96f25c11345..ab52c6bb7f0c11e51fefef231c108d0c9381547e 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -104,7 +104,7 @@ vfio_known_safe_misalignment(const char *name, uint64_t iova, uint64_t offset_wi vfio_listener_region_add_no_dma_map(const char *name, uint64_t iova, uint64_t size, uint64_t page_size) "Region \"%s\" 0x%"PRIx64" size=0x%"PRIx64" is not aligned to 0x%"PRIx64" and cannot be mapped for DMA" vfio_listener_region_del(uint64_t start, uint64_t end) "region_del 0x%"PRIx64" - 0x%"PRIx64 vfio_device_dirty_tracking_update(uint64_t start, uint64_t end, uint64_t min, uint64_t max) "section 0x%"PRIx64" - 0x%"PRIx64" -> update [0x%"PRIx64" - 0x%"PRIx64"]" -vfio_device_dirty_tracking_start(int nr_ranges, uint64_t min32, uint64_t max32, uint64_t min64, uint64_t max64) "nr_ranges %d 32:[0x%"PRIx64" - 0x%"PRIx64"], 64:[0x%"PRIx64" - 0x%"PRIx64"]" +vfio_device_dirty_tracking_start(int nr_ranges, uint64_t min32, uint64_t max32, uint64_t min64, uint64_t max64, uint64_t minpci, uint64_t maxpci) "nr_ranges %d 32:[0x%"PRIx64" - 0x%"PRIx64"], 64:[0x%"PRIx64" - 0x%"PRIx64"], pci:[0x%"PRIx64" - 0x%"PRIx64"]" vfio_disconnect_container(int fd) "close container->fd=%d" vfio_put_group(int fd) "close group->fd=%d" vfio_get_device(const char * name, unsigned int flags, unsigned int num_regions, unsigned int num_irqs) "Device %s flags: %u, regions: %u, irqs: %u"