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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1717771184; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ekL5HzvnxBYBoYa78c8HNqOALcdyf3GJNi8rKTmSLDs=; b=MKSJkHcwUhHntpOre17/KxGTLlMqf+66HN0Im0PWJayN/6G3pKOat1IGHxmD8BOPZTsyEe mbZ5FYPuJDlN5x44KejEWRG0KO8krmjx6pXoG42AkHJ+6FG7LBqlDUJMYa6/8E/J1vefGe HQJsTSE6mbaHFaEGl1EnFxHo+i2g0zU= X-MC-Unique: yCXr66ovN9KRrXCF4P8TGw-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, mst@redhat.com, jean-philippe@linaro.org, imammedo@redhat.com, peter.maydell@linaro.org, clg@redhat.com, yanghliu@redhat.com, zhenzhong.duan@intel.com Cc: alex.williamson@redhat.com, jasowang@redhat.com, pbonzini@redhat.com, berrange@redhat.com Subject: [RFC v2 4/7] virtio-iommu: Compute host reserved regions Date: Fri, 7 Jun 2024 16:37:24 +0200 Message-ID: <20240607143905.765133-5-eric.auger@redhat.com> In-Reply-To: <20240607143905.765133-1-eric.auger@redhat.com> References: <20240607143905.765133-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" Compute the host reserved regions in virtio_iommu_set_iommu_device(). The usable IOVA regions are retrieved from the HOSTIOMMUDevice. The virtio_iommu_set_host_iova_ranges() helper turns usable regions into complementary reserved regions while testing the inclusion into existing ones. virtio_iommu_set_host_iova_ranges() reuse the implementation of virtio_iommu_set_iova_ranges() which will be removed in subsequent patches. rebuild_resv_regions() is just moved. Signed-off-by: Eric Auger --- hw/virtio/virtio-iommu.c | 151 ++++++++++++++++++++++++++++++--------- 1 file changed, 117 insertions(+), 34 deletions(-) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 0680a357f0..33e9682b83 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -494,12 +494,114 @@ get_host_iommu_device(VirtIOIOMMU *viommu, PCIBus *b= us, int devfn) { return g_hash_table_lookup(viommu->host_iommu_devices, &key); } =20 +/** + * rebuild_resv_regions: rebuild resv regions with both the + * info of host resv ranges and property set resv ranges + */ +static int rebuild_resv_regions(IOMMUDevice *sdev) +{ + GList *l; + int i =3D 0; + + /* free the existing list and rebuild it from scratch */ + g_list_free_full(sdev->resv_regions, g_free); + sdev->resv_regions =3D NULL; + + /* First add host reserved regions if any, all tagged as RESERVED */ + for (l =3D sdev->host_resv_ranges; l; l =3D l->next) { + ReservedRegion *reg =3D g_new0(ReservedRegion, 1); + Range *r =3D (Range *)l->data; + + reg->type =3D VIRTIO_IOMMU_RESV_MEM_T_RESERVED; + range_set_bounds(®->range, range_lob(r), range_upb(r)); + sdev->resv_regions =3D resv_region_list_insert(sdev->resv_regions,= reg); + trace_virtio_iommu_host_resv_regions(sdev->iommu_mr.parent_obj.nam= e, i, + range_lob(®->range), + range_upb(®->range)); + i++; + } + /* + * then add higher priority reserved regions set by the machine + * through properties + */ + add_prop_resv_regions(sdev); + return 0; +} + +static int virtio_iommu_set_host_iova_ranges(VirtIOIOMMU *s, PCIBus *bus, + int devfn, GList *iova_ranges, + Error **errp) +{ + IOMMUPciBus *sbus =3D g_hash_table_lookup(s->as_by_busptr, bus); + IOMMUDevice *sdev; + GList *current_ranges; + GList *l, *tmp, *new_ranges =3D NULL; + int ret =3D -EINVAL; + + if (!sbus) { + error_report("%s no sbus", __func__); + } + + sdev =3D sbus->pbdev[devfn]; + + current_ranges =3D sdev->host_resv_ranges; + + if (sdev->probe_done) { + error_setg(errp, + "%s: Notified about new host reserved regions after pro= be", + __func__); + goto out; + } + + /* check that each new resv region is included in an existing one */ + if (sdev->host_resv_ranges) { + range_inverse_array(iova_ranges, + &new_ranges, + 0, UINT64_MAX); + + for (tmp =3D new_ranges; tmp; tmp =3D tmp->next) { + Range *newr =3D (Range *)tmp->data; + bool included =3D false; + + for (l =3D current_ranges; l; l =3D l->next) { + Range * r =3D (Range *)l->data; + + if (range_contains_range(r, newr)) { + included =3D true; + break; + } + } + if (!included) { + goto error; + } + } + /* all new reserved ranges are included in existing ones */ + ret =3D 0; + goto out; + } + + range_inverse_array(iova_ranges, + &sdev->host_resv_ranges, + 0, UINT64_MAX); + rebuild_resv_regions(sdev); + + return 0; +error: + error_setg(errp, "%s Conflicting host reserved ranges set!", + __func__); +out: + g_list_free_full(new_ranges, g_free); + return ret; +} + static bool virtio_iommu_set_iommu_device(PCIBus *bus, void *opaque, int d= evfn, HostIOMMUDevice *hiod, Error **e= rrp) { VirtIOIOMMU *viommu =3D opaque; VirtioHostIOMMUDevice *vhiod; + HostIOMMUDeviceClass *hiodc =3D HOST_IOMMU_DEVICE_GET_CLASS(hiod); struct hiod_key *new_key; + GList *host_iova_ranges =3D NULL; =20 assert(hiod); =20 @@ -509,6 +611,20 @@ static bool virtio_iommu_set_iommu_device(PCIBus *bus,= void *opaque, int devfn, return false; } =20 + if (hiodc->get_iova_ranges) { + int ret; + host_iova_ranges =3D hiodc->get_iova_ranges(hiod, errp); + if (!host_iova_ranges) { + return true; /* some old kernels may not support that capabili= ty */ + } + ret =3D virtio_iommu_set_host_iova_ranges(viommu, bus, devfn, + host_iova_ranges, errp); + if (ret) { + g_list_free_full(host_iova_ranges, g_free); + return false; + } + } + vhiod =3D g_malloc0(sizeof(VirtioHostIOMMUDevice)); vhiod->bus =3D bus; vhiod->devfn =3D (uint8_t)devfn; @@ -521,6 +637,7 @@ static bool virtio_iommu_set_iommu_device(PCIBus *bus, = void *opaque, int devfn, =20 object_ref(hiod); g_hash_table_insert(viommu->host_iommu_devices, new_key, vhiod); + g_list_free_full(host_iova_ranges, g_free); =20 return true; } @@ -1243,40 +1360,6 @@ static int virtio_iommu_set_page_size_mask(IOMMUMemo= ryRegion *mr, return 0; } =20 -/** - * rebuild_resv_regions: rebuild resv regions with both the - * info of host resv ranges and property set resv ranges - */ -static int rebuild_resv_regions(IOMMUDevice *sdev) -{ - GList *l; - int i =3D 0; - - /* free the existing list and rebuild it from scratch */ - g_list_free_full(sdev->resv_regions, g_free); - sdev->resv_regions =3D NULL; - - /* First add host reserved regions if any, all tagged as RESERVED */ - for (l =3D sdev->host_resv_ranges; l; l =3D l->next) { - ReservedRegion *reg =3D g_new0(ReservedRegion, 1); - Range *r =3D (Range *)l->data; - - reg->type =3D VIRTIO_IOMMU_RESV_MEM_T_RESERVED; - range_set_bounds(®->range, range_lob(r), range_upb(r)); - sdev->resv_regions =3D resv_region_list_insert(sdev->resv_regions,= reg); - trace_virtio_iommu_host_resv_regions(sdev->iommu_mr.parent_obj.nam= e, i, - range_lob(®->range), - range_upb(®->range)); - i++; - } - /* - * then add higher priority reserved regions set by the machine - * through properties - */ - add_prop_resv_regions(sdev); - return 0; -} - /** * virtio_iommu_set_iova_ranges: Conveys the usable IOVA ranges * --=20 2.41.0