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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1719264392; 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=OBq61iAeWHT+8oXnJgWDEC4tGrxsioEtPTb5O+a6nVI=; b=PGubGb4gc44tguoMkmztcw+mH89XO2dlMZ6lk82p4gDBvJL24cNR7Yx3L1O4YqNUSAFXDu Lrb9V8+uox+7M7KbJ1VnOmTGt9P58Dqk9f4bez8RIEAP74PKIVVCEkV2Mv1Io7Y0ErmWOZ 26hwiaO5sHxtWYC2EYzVuhkUDVRqESo= X-MC-Unique: GPd5RrMUOMW2qoOVH4BJzg-1 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Zhenzhong Duan , Eric Auger Subject: [PULL 35/42] vfio/container: Discover IOMMU type before creating the container Date: Mon, 24 Jun 2024 23:24:49 +0200 Message-ID: <20240624212456.350919-36-clg@redhat.com> In-Reply-To: <20240624212456.350919-1-clg@redhat.com> References: <20240624212456.350919-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 10 X-Spam_score: 1.0 X-Spam_bar: + X-Spam_report: (1.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.207, 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, RCVD_IN_SBL_CSS=3.335, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1719264444173100001 Since the QEMU struct type representing the VFIO container is deduced from the IOMMU type exposed by the host, this type should be well defined *before* creating the container struct. This will be necessary to instantiate a QOM object of the correct type in future changes. Rework vfio_set_iommu() to extract the part doing the container initialization and move it under vfio_create_container(). Reviewed-by: Zhenzhong Duan Reviewed-by: Eric Auger Tested-by: Eric Auger Signed-off-by: C=C3=A9dric Le Goater --- hw/vfio/container.c | 47 ++++++++++++++++++++++----------------------- 1 file changed, 23 insertions(+), 24 deletions(-) diff --git a/hw/vfio/container.c b/hw/vfio/container.c index a8691942791006f44f7a3c34b32c67ca51766182..31bdc46a96d1626b237227a2500= 7957e1d472757 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -389,54 +389,56 @@ static const char *vfio_get_iommu_class_name(int iomm= u_type) }; } =20 -static bool vfio_set_iommu(VFIOContainer *container, int group_fd, - Error **errp) +static bool vfio_set_iommu(int container_fd, int group_fd, + int *iommu_type, Error **errp) { - int iommu_type; - const VFIOIOMMUClass *vioc; - const char *vioc_name; - - iommu_type =3D vfio_get_iommu_type(container->fd, errp); - if (iommu_type < 0) { - return false; - } - - if (ioctl(group_fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) { + if (ioctl(group_fd, VFIO_GROUP_SET_CONTAINER, &container_fd)) { error_setg_errno(errp, errno, "Failed to set group container"); return false; } =20 - while (ioctl(container->fd, VFIO_SET_IOMMU, iommu_type)) { - if (iommu_type =3D=3D VFIO_SPAPR_TCE_v2_IOMMU) { + while (ioctl(container_fd, VFIO_SET_IOMMU, *iommu_type)) { + if (*iommu_type =3D=3D VFIO_SPAPR_TCE_v2_IOMMU) { /* * On sPAPR, despite the IOMMU subdriver always advertises v1 = and * v2, the running platform may not support v2 and there is no * way to guess it until an IOMMU group gets added to the cont= ainer. * So in case it fails with v2, try v1 as a fallback. */ - iommu_type =3D VFIO_SPAPR_TCE_IOMMU; + *iommu_type =3D VFIO_SPAPR_TCE_IOMMU; continue; } error_setg_errno(errp, errno, "Failed to set iommu for container"); return false; } =20 - container->iommu_type =3D iommu_type; - - vioc_name =3D vfio_get_iommu_class_name(iommu_type); - vioc =3D VFIO_IOMMU_CLASS(object_class_by_name(vioc_name)); - - vfio_container_init(&container->bcontainer, vioc); return true; } =20 static VFIOContainer *vfio_create_container(int fd, VFIOGroup *group, Error **errp) { + int iommu_type; + const VFIOIOMMUClass *vioc; + const char *vioc_name; VFIOContainer *container; =20 + iommu_type =3D vfio_get_iommu_type(fd, errp); + if (iommu_type < 0) { + return NULL; + } + + if (!vfio_set_iommu(fd, group->fd, &iommu_type, errp)) { + return NULL; + } + + vioc_name =3D vfio_get_iommu_class_name(iommu_type); + vioc =3D VFIO_IOMMU_CLASS(object_class_by_name(vioc_name)); + container =3D g_malloc0(sizeof(*container)); container->fd =3D fd; + container->iommu_type =3D iommu_type; + vfio_container_init(&container->bcontainer, vioc); return container; } =20 @@ -618,9 +620,6 @@ static bool vfio_connect_container(VFIOGroup *group, Ad= dressSpace *as, if (!container) { goto close_fd_exit; } - if (!vfio_set_iommu(container, group->fd, errp)) { - goto free_container_exit; - } bcontainer =3D &container->bcontainer; =20 if (!vfio_cpr_register_container(bcontainer, errp)) { --=20 2.45.2