From nobody Tue Feb 10 07:23:12 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 167390680386556.62290302399788; Mon, 16 Jan 2023 14:06:43 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pHXUy-0006qB-W9; Mon, 16 Jan 2023 16:58:37 -0500 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 1pHXUo-0006hY-ER for qemu-devel@nongnu.org; Mon, 16 Jan 2023 16:58:26 -0500 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pHXUm-0003Yt-ML for qemu-devel@nongnu.org; Mon, 16 Jan 2023 16:58:26 -0500 Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pHXUl-0097VU-2B; Mon, 16 Jan 2023 21:58:25 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1pHXUX-004iPz-16; Mon, 16 Jan 2023 21:58:09 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=sxDPxfBvNjazo74b1zBCuxurLMOuIPi5HafhaiK8DrI=; b=jOXTKnBkDUzB2PlJNAdj6FYjM/ SPG18K29bDzlLtXN0/eDHsBSRfnWkcb8VgjPgPKaEnaXmW6+3cpGzP0iHADVfAfjgYBswj5+4dRjQ nieO+csy0EkQIGgPqNvLwhzQHO49fYI82lPwXF6mwSGLPFk87GHeIS7ACEFXnaeuSWhsCmW6DyeHA RFQFNdhec+e96sIEe+JexKBuQ8TrqusjnhrlVdtywrERlndBT4ZAVmd8n/ssHQB35ZPVrZSneV5oL 9uDPma2Lv0n8FzczFD6h8cuM1eba/0ehbani0DCHRyCw7YAygDWuDAQ0dtv8B613YP1Hb4Ilt31Ba +sCE5Qag==; From: David Woodhouse To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Paul Durrant , Joao Martins , Ankur Arora , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Thomas Huth , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Juan Quintela , "Dr . David Alan Gilbert" , Claudio Fontana , Julien Grall , "Michael S. Tsirkin" , Marcel Apfelbaum , armbru@redhat.com Subject: [PATCH v7 35/51] hw/xen: Implement EVTCHNOP_bind_interdomain Date: Mon, 16 Jan 2023 21:57:49 +0000 Message-Id: <20230116215805.1123514-36-dwmw2@infradead.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116215805.1123514-1-dwmw2@infradead.org> References: <20230116215805.1123514-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html 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: none client-ip=2001:8b0:10b:1236::1; envelope-from=BATV+fb0b8ce1ba8490165fd5+7085+infradead.org+dwmw2@casper.srs.infradead.org; helo=casper.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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1673906804394100001 Content-Type: text/plain; charset="utf-8" From: David Woodhouse Signed-off-by: David Woodhouse --- hw/i386/kvm/xen_evtchn.c | 78 +++++++++++++++++++++++++++++++++++++++ hw/i386/kvm/xen_evtchn.h | 2 + target/i386/kvm/xen-emu.c | 16 ++++++++ 3 files changed, 96 insertions(+) diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c index 15c467ad7f..511d52a31d 100644 --- a/hw/i386/kvm/xen_evtchn.c +++ b/hw/i386/kvm/xen_evtchn.c @@ -713,6 +713,23 @@ static int close_port(XenEvtchnState *s, evtchn_port_t= port) } break; =20 + case EVTCHNSTAT_interdomain: + if (p->type_val & PORT_INFO_TYPEVAL_REMOTE_QEMU) { + /* Not yet implemented. This can't happen! */ + } else { + /* Loopback interdomain */ + XenEvtchnPort *rp =3D &s->port_table[p->type_val]; + if (!valid_port(p->type_val) || rp->type_val !=3D port || + rp->type !=3D EVTCHNSTAT_interdomain) { + error_report("Inconsistent state for interdomain unbind"); + } else { + /* Set the other end back to unbound */ + rp->type =3D EVTCHNSTAT_unbound; + rp->type_val =3D 0; + } + } + break; + default: break; } @@ -828,6 +845,67 @@ int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi) return ret; } =20 +int xen_evtchn_bind_interdomain_op(struct evtchn_bind_interdomain *interdo= main) +{ + XenEvtchnState *s =3D xen_evtchn_singleton; + uint16_t type_val; + int ret; + + if (!s) { + return -ENOTSUP; + } + + if (interdomain->remote_dom =3D=3D DOMID_QEMU) { + type_val =3D PORT_INFO_TYPEVAL_REMOTE_QEMU; + } else if (interdomain->remote_dom =3D=3D DOMID_SELF || + interdomain->remote_dom =3D=3D xen_domid) { + type_val =3D 0; + } else { + return -ESRCH; + } + + if (!valid_port(interdomain->remote_port)) { + return -EINVAL; + } + + qemu_mutex_lock(&s->port_lock); + + /* The newly allocated port starts out as unbound */ + ret =3D allocate_port(s, 0, EVTCHNSTAT_unbound, type_val, + &interdomain->local_port); + if (ret) { + goto out; + } + + if (interdomain->remote_dom =3D=3D DOMID_QEMU) { + /* We haven't hooked up QEMU's PV drivers to this yet */ + ret =3D -ENOSYS; + } else { + /* Loopback */ + XenEvtchnPort *rp =3D &s->port_table[interdomain->remote_port]; + XenEvtchnPort *lp =3D &s->port_table[interdomain->local_port]; + + if (rp->type =3D=3D EVTCHNSTAT_unbound && rp->type_val =3D=3D 0) { + /* It's a match! */ + rp->type =3D EVTCHNSTAT_interdomain; + rp->type_val =3D interdomain->local_port; + + lp->type =3D EVTCHNSTAT_interdomain; + lp->type_val =3D interdomain->remote_port; + } else { + ret =3D -EINVAL; + } + } + + if (ret) { + free_port(s, interdomain->local_port); + } + out: + qemu_mutex_unlock(&s->port_lock); + + return ret; + +} int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc) { XenEvtchnState *s =3D xen_evtchn_singleton; diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h index fc080138e3..1ebc7580eb 100644 --- a/hw/i386/kvm/xen_evtchn.h +++ b/hw/i386/kvm/xen_evtchn.h @@ -22,6 +22,7 @@ struct evtchn_bind_virq; struct evtchn_bind_ipi; struct evtchn_send; struct evtchn_alloc_unbound; +struct evtchn_bind_interdomain; int xen_evtchn_status_op(struct evtchn_status *status); int xen_evtchn_close_op(struct evtchn_close *close); int xen_evtchn_unmask_op(struct evtchn_unmask *unmask); @@ -29,5 +30,6 @@ int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq= ); int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi); int xen_evtchn_send_op(struct evtchn_send *send); int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc); +int xen_evtchn_bind_interdomain_op(struct evtchn_bind_interdomain *interdo= main); =20 #endif /* QEMU_XEN_EVTCHN_H */ diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index 9dd8abdd9a..5f2309d282 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -925,6 +925,22 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exi= t *exit, X86CPU *cpu, } break; } + case EVTCHNOP_bind_interdomain: { + struct evtchn_bind_interdomain interdomain; + + qemu_build_assert(sizeof(interdomain) =3D=3D 12); + if (kvm_copy_from_gva(cs, arg, &interdomain, sizeof(interdomain)))= { + err =3D -EFAULT; + break; + } + + err =3D xen_evtchn_bind_interdomain_op(&interdomain); + if (!err && + kvm_copy_to_gva(cs, arg, &interdomain, sizeof(interdomain))) { + err =3D -EFAULT; + } + break; + } default: return false; } --=20 2.39.0