From mboxrd@z Thu Jan 1 00:00:00 1970 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 5BB54C4332F for ; Fri, 16 Dec 2022 00:56:15 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p5ynX-0005MD-AL; Thu, 15 Dec 2022 19:41:59 -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 1p5ynG-0005Fe-PX for qemu-devel@nongnu.org; Thu, 15 Dec 2022 19:41:45 -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 1p5ynB-0006ab-VN for qemu-devel@nongnu.org; Thu, 15 Dec 2022 19:41:42 -0500 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=HxpDGgysz3OvbZOSMLjD0D0bLhGzUibeNUTG8eP7VKk=; b=u/5Szgyk8Apl+QImVwN1ZdRX39 sQDRqrAIdD86fczpETB5RoAkUNGWhvtZKKdAwlA4+9s/8+DP2/10FOWMyOeWrRQY+sTLKoMxgxSc4 quUoMPKet3RR/opG2HDOokxI3ar4Ay8ExTdTJWKXS6F/NZdNTQQ994u6KURTFOcNSIBpnXR+p4YBf gSjFhh+JKhBaqOR4ryusRSVA4Yrgr38qO2HWh5pcs+D0fAz8mcjpphInj53X9eo3B4dq0vHZrcSsi U2lFoKicnL/4C0Om/pWL9us7BDv3at/lKkxXt2aFmGLmbUnEq9SuRQGaxWC57lXD3zSP1sMsoelyM ChrsoGfQ==; 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 1p5yn6-00EvVH-CV; Fri, 16 Dec 2022 00:41:35 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1p5ymw-003cQ8-Ei; Fri, 16 Dec 2022 00:41:22 +0000 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 Subject: [RFC PATCH v3 32/38] hw/xen: Implement EVTCHNOP_bind_interdomain Date: Fri, 16 Dec 2022 00:41:11 +0000 Message-Id: <20221216004117.862106-33-dwmw2@infradead.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20221216004117.862106-1-dwmw2@infradead.org> References: <20221216004117.862106-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: none client-ip=2001:8b0:10b:1236::1; envelope-from=BATV+64e888c4aa1bfc596c85+7054+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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: David Woodhouse Signed-off-by: David Woodhouse --- hw/i386/kvm/xen_evtchn.c | 77 +++++++++++++++++++++++++++++++++++++++ hw/i386/kvm/xen_evtchn.h | 2 + target/i386/kvm/xen-emu.c | 15 ++++++++ 3 files changed, 94 insertions(+) diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c index 4272b63853..b286bbd20e 100644 --- a/hw/i386/kvm/xen_evtchn.c +++ b/hw/i386/kvm/xen_evtchn.c @@ -618,6 +618,23 @@ static int close_port(XenEvtchnState *s, evtchn_port_t port) deassign_kernel_port(port); break; + case EVTCHNSTAT_interdomain: + if (p->type_val & PORT_INFO_TYPEVAL_REMOTE_QEMU) { + /* Not yet implemented. This can't happen! */ + } else { + /* Loopback interdomain */ + XenEvtchnPort *rp = &s->port_table[p->type_val]; + if (!valid_port(p->type_val) || rp->type_val != port || + rp->type != EVTCHNSTAT_interdomain) { + error_report("Inconsistent state for interdomain unbind"); + } else { + /* Set the other end back to unbound */ + rp->type = EVTCHNSTAT_unbound; + rp->type_val = 0; + } + } + break; + default: break; } @@ -732,6 +749,66 @@ int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi) return ret; } +int xen_evtchn_bind_interdomain_op(struct evtchn_bind_interdomain *interdomain) +{ + XenEvtchnState *s = xen_evtchn_singleton; + uint16_t type_val; + int ret; + + if (!s) { + return -ENOTSUP; + } + + if (interdomain->remote_dom == DOMID_QEMU) { + type_val = PORT_INFO_TYPEVAL_REMOTE_QEMU; + } else if (interdomain->remote_dom == DOMID_SELF || + interdomain->remote_dom == xen_domid) { + type_val = 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 = allocate_port(s, 0, EVTCHNSTAT_unbound, type_val, &interdomain->local_port); + if (ret) { + goto out; + } + + if (interdomain->remote_dom == DOMID_QEMU) { + /* We haven't hooked up QEMU's PV drivers to this yet */ + ret = -ENOSYS; + } else { + /* Loopback */ + XenEvtchnPort *rp = &s->port_table[interdomain->remote_port]; + XenEvtchnPort *lp = &s->port_table[interdomain->local_port]; + + if (rp->type == EVTCHNSTAT_unbound && rp->type_val == 0) { + /* It's a match! */ + rp->type = EVTCHNSTAT_interdomain; + rp->type_val = interdomain->local_port; + + lp->type = EVTCHNSTAT_interdomain; + lp->type_val = interdomain->remote_port; + } else { + ret = -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 = xen_evtchn_singleton; diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h index 5dc68a188d..4783a6f127 100644 --- a/hw/i386/kvm/xen_evtchn.h +++ b/hw/i386/kvm/xen_evtchn.h @@ -20,6 +20,7 @@ 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); @@ -27,3 +28,4 @@ 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 *interdomain); diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index 6f393c4149..c4c595cb1a 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -827,6 +827,21 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit, X86CPU *cpu, } break; } + case EVTCHNOP_bind_interdomain: { + struct evtchn_bind_interdomain interdomain; + + qemu_build_assert(sizeof(interdomain) == 12); + if (kvm_copy_from_gva(cs, arg, &interdomain, sizeof(interdomain))) { + err = -EFAULT; + break; + } + + err = xen_evtchn_bind_interdomain_op(&interdomain); + if (!err && kvm_copy_to_gva(cs, arg, &interdomain, sizeof(interdomain))) { + err = -EFAULT; + } + break; + } default: return false; } -- 2.35.3