From patchwork Wed Dec 21 01:06:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 1718098 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=qusgPlzo; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4NcG2k0c2Vz1ydd for ; Wed, 21 Dec 2022 12:25:02 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p7nZf-0003M8-9s; Tue, 20 Dec 2022 20:07:11 -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 1p7nZF-0002rE-Jg for qemu-devel@nongnu.org; Tue, 20 Dec 2022 20:06:48 -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 1p7nZ9-0004D0-8m for qemu-devel@nongnu.org; Tue, 20 Dec 2022 20:06:44 -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=0h4+VEayZozwdfLV1ZkUy0k95L8X+22AgoqEM8r8NJA=; b=qusgPlzo41sQKXhudKTkavX2hj VlPKW0cGb0pN+dkO99+0bqfDsEZ4P0iAUB7IxysiCL/zXjXpS/XzpJa2xSOzdTNDqZ2mFj7EO+etc kuGwajqanvu6SeCjb2uYlCE9PhQCXmxOJshcoIqHZjOLO0u0QVqwzisFjaiEFLwPFaJbuyuID1PDp tVO0VZhmkAMnydwJFzJ1yyh2w8/EmQfhOpHm4uH3TFDRNJarCHCEdgpASFWbSybvDwZ3XfZ95KUm1 fRJD+pLHN+eKNNFjAvoKLgyjXVhwliO1rl/iktWBWcJZae/GlNO9+bRa91o63D75T43auPpaBiftj fvE6BZvg==; 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 1p7nZ8-002Kcb-Ds; Wed, 21 Dec 2022 01:06:39 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1p7nYx-004CMz-1e; Wed, 21 Dec 2022 01:06:27 +0000 From: David Woodhouse To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Paul Durrant , Joao Martins , Ankur Arora , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Thomas Huth , =?utf-8?q?Alex_Benn=C3=A9e?= , Juan Quintela , "Dr . David Alan Gilbert" , Claudio Fontana Subject: [RFC PATCH v4 33/47] hw/xen: Implement EVTCHNOP_bind_ipi Date: Wed, 21 Dec 2022 01:06:09 +0000 Message-Id: <20221221010623.1000191-34-dwmw2@infradead.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20221221010623.1000191-1-dwmw2@infradead.org> References: <20221221010623.1000191-1-dwmw2@infradead.org> MIME-Version: 1.0 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+b12bb331c036832273ad+7059+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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: David Woodhouse Signed-off-by: David Woodhouse --- hw/i386/kvm/xen_evtchn.c | 69 +++++++++++++++++++++++++++++++++++++++ hw/i386/kvm/xen_evtchn.h | 2 ++ target/i386/kvm/xen-emu.c | 15 +++++++++ 3 files changed, 86 insertions(+) diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c index d94f38c491..f33eb0d3f4 100644 --- a/hw/i386/kvm/xen_evtchn.c +++ b/hw/i386/kvm/xen_evtchn.c @@ -13,6 +13,7 @@ #include "qemu/host-utils.h" #include "qemu/module.h" #include "qemu/main-loop.h" +#include "qemu/log.h" #include "qapi/error.h" #include "qom/object.h" #include "exec/target_page.h" @@ -235,6 +236,43 @@ static void inject_callback(XenEvtchnState *s, uint32_t vcpu) /* ... and isn't implemented yet. */ } +static void deassign_kernel_port(evtchn_port_t port) +{ + struct kvm_xen_hvm_attr ha; + int ret; + + ha.type = KVM_XEN_ATTR_TYPE_EVTCHN; + ha.u.evtchn.send_port = port; + ha.u.evtchn.flags = KVM_XEN_EVTCHN_DEASSIGN; + + ret = kvm_vm_ioctl(kvm_state, KVM_XEN_HVM_SET_ATTR, &ha); + if (ret) { + qemu_log_mask(LOG_GUEST_ERROR, "Failed to unbind kernel port %d: %s\n", + port, strerror(ret)); + } +} + +static int assign_kernel_port(uint16_t type, evtchn_port_t port, + uint32_t vcpu_id) +{ + CPUState *cpu = qemu_get_cpu(vcpu_id); + struct kvm_xen_hvm_attr ha; + + if (!cpu) { + return -ENOENT; + } + + ha.type = KVM_XEN_ATTR_TYPE_EVTCHN; + ha.u.evtchn.send_port = port; + ha.u.evtchn.type = type; + ha.u.evtchn.flags = 0; + ha.u.evtchn.deliver.port.port = port; + ha.u.evtchn.deliver.port.vcpu = kvm_arch_vcpu_id(cpu); + ha.u.evtchn.deliver.port.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL; + + return kvm_vm_ioctl(kvm_state, KVM_XEN_HVM_SET_ATTR, &ha); +} + static bool valid_port(evtchn_port_t port) { if (!port) { @@ -519,6 +557,12 @@ static int close_port(XenEvtchnState *s, evtchn_port_t port) p->type_val, 0); break; + case EVTCHNSTAT_ipi: + if (s->evtchn_in_kernel) { + deassign_kernel_port(port); + } + break; + default: break; } @@ -608,3 +652,28 @@ int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq) return ret; } + +int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi) +{ + XenEvtchnState *s = xen_evtchn_singleton; + int ret; + + if (!s) { + return -ENOTSUP; + } + + if (!valid_vcpu(ipi->vcpu)) { + return -ENOENT; + } + + qemu_mutex_lock(&s->port_lock); + + ret = allocate_port(s, ipi->vcpu, EVTCHNSTAT_ipi, 0, &ipi->port); + if (!ret && s->evtchn_in_kernel) { + assign_kernel_port(EVTCHNSTAT_ipi, ipi->port, ipi->vcpu); + } + + qemu_mutex_unlock(&s->port_lock); + + return ret; +} diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h index 0ea13dda3a..107f420848 100644 --- a/hw/i386/kvm/xen_evtchn.h +++ b/hw/i386/kvm/xen_evtchn.h @@ -19,9 +19,11 @@ struct evtchn_status; struct evtchn_close; struct evtchn_unmask; struct evtchn_bind_virq; +struct evtchn_bind_ipi; 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); int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq); +int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi); #endif /* QEMU_XEN_EVTCHN_H */ diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index fc3c0fa039..0b2f3dff15 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -876,6 +876,21 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit, X86CPU *cpu, } break; } + case EVTCHNOP_bind_ipi: { + struct evtchn_bind_ipi ipi; + + qemu_build_assert(sizeof(ipi) == 8); + if (kvm_copy_from_gva(cs, arg, &ipi, sizeof(ipi))) { + err = -EFAULT; + break; + } + + err = xen_evtchn_bind_ipi_op(&ipi); + if (!err && kvm_copy_to_gva(cs, arg, &ipi, sizeof(ipi))) { + err = -EFAULT; + } + break; + } default: return false; }