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 X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56CB0C4338F for ; Sun, 15 Aug 2021 00:16:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3A40D60F51 for ; Sun, 15 Aug 2021 00:16:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233644AbhHOARE (ORCPT ); Sat, 14 Aug 2021 20:17:04 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:55341 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235865AbhHOAQO (ORCPT ); Sat, 14 Aug 2021 20:16:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628986545; 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=szanf3Wo9Olk1C71Azm5uBHzj3wl+3fvsPglYztUeHY=; b=KnIXNV2ZEM45avYJNpDQEq5wHaCgu2ENiAkiAE6lSIYYX5EjWzKOggneoKTLhHN6W8fUIp ukFGBlqTAADAZA875aXmCJTgb8rhySktMzY2ros8OnycDhh76lmJ9CXFFO5iZe4L4+n8RD cRVliF7ecq8BsR2ioX4PfLiTV/PA2QM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-338-rLszs-xqO7ytkvRLUVdQmA-1; Sat, 14 Aug 2021 20:15:43 -0400 X-MC-Unique: rLszs-xqO7ytkvRLUVdQmA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 940C11853025; Sun, 15 Aug 2021 00:15:42 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-103.bne.redhat.com [10.64.54.103]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 15C0710016FF; Sun, 15 Aug 2021 00:15:38 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, james.morse@arm.com, mark.rutland@arm.com, Jonathan.Cameron@huawei.com, will@kernel.org, maz@kernel.org, pbonzini@redhat.com Subject: [PATCH v4 18/21] KVM: arm64: Support SDEI event injection Date: Sun, 15 Aug 2021 08:13:49 +0800 Message-Id: <20210815001352.81927-19-gshan@redhat.com> In-Reply-To: <20210815001352.81927-1-gshan@redhat.com> References: <20210815001352.81927-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports SDEI event injection by implementing kvm_sdei_inject(). It's called by kernel directly or VMM through ioctl command to inject SDEI event to the specific vCPU. Signed-off-by: Gavin Shan --- arch/arm64/include/asm/kvm_sdei.h | 2 + arch/arm64/include/uapi/asm/kvm_sdei.h | 1 + arch/arm64/kvm/sdei.c | 108 +++++++++++++++++++++++++ 3 files changed, 111 insertions(+) diff --git a/arch/arm64/include/asm/kvm_sdei.h b/arch/arm64/include/asm/kvm_sdei.h index a997989bab77..51087fe971ba 100644 --- a/arch/arm64/include/asm/kvm_sdei.h +++ b/arch/arm64/include/asm/kvm_sdei.h @@ -124,6 +124,8 @@ void kvm_sdei_create_vcpu(struct kvm_vcpu *vcpu); int kvm_sdei_hypercall(struct kvm_vcpu *vcpu); int kvm_sdei_register_notifier(struct kvm *kvm, unsigned long num, kvm_sdei_notifier notifier); +int kvm_sdei_inject(struct kvm_vcpu *vcpu, + unsigned long num, bool immediate); void kvm_sdei_deliver(struct kvm_vcpu *vcpu); long kvm_sdei_vm_ioctl(struct kvm *kvm, unsigned long arg); long kvm_sdei_vcpu_ioctl(struct kvm_vcpu *vcpu, unsigned long arg); diff --git a/arch/arm64/include/uapi/asm/kvm_sdei.h b/arch/arm64/include/uapi/asm/kvm_sdei.h index b916c3435646..f7a6b2b22b50 100644 --- a/arch/arm64/include/uapi/asm/kvm_sdei.h +++ b/arch/arm64/include/uapi/asm/kvm_sdei.h @@ -67,6 +67,7 @@ struct kvm_sdei_vcpu_state { #define KVM_SDEI_CMD_SET_VEVENT 7 #define KVM_SDEI_CMD_GET_VCPU_STATE 8 #define KVM_SDEI_CMD_SET_VCPU_STATE 9 +#define KVM_SDEI_CMD_INJECT_EVENT 10 struct kvm_sdei_cmd { __u32 cmd; diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 79315b77f24b..7c2789cd1421 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -802,6 +802,111 @@ int kvm_sdei_register_notifier(struct kvm *kvm, return ret; } +int kvm_sdei_inject(struct kvm_vcpu *vcpu, + unsigned long num, + bool immediate) +{ + struct kvm *kvm = vcpu->kvm; + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_event *kse = NULL; + struct kvm_sdei_kvm_event *kske = NULL; + struct kvm_sdei_vcpu_event *ksve = NULL; + int index, ret = 0; + + /* Sanity check */ + if (!(ksdei && vsdei)) { + ret = -EPERM; + goto out; + } + + if (!kvm_sdei_is_valid_event_num(num)) { + ret = -EINVAL; + goto out; + } + + /* Check the kvm event */ + spin_lock(&ksdei->lock); + kske = kvm_sdei_find_kvm_event(kvm, num); + if (!kske) { + ret = -ENOENT; + goto unlock_kvm; + } + + kse = kske->kse; + index = (kse->state.type == SDEI_EVENT_TYPE_PRIVATE) ? + vcpu->vcpu_idx : 0; + if (!(kvm_sdei_is_registered(kske, index) && + kvm_sdei_is_enabled(kske, index))) { + ret = -EPERM; + goto unlock_kvm; + } + + /* Check the vcpu state */ + spin_lock(&vsdei->lock); + if (vsdei->state.masked) { + ret = -EPERM; + goto unlock_vcpu; + } + + /* Check if the event can be delivered immediately */ + if (immediate) { + if (kse->state.priority == SDEI_EVENT_PRIORITY_CRITICAL && + !list_empty(&vsdei->critical_events)) { + ret = -ENOSPC; + goto unlock_vcpu; + } + + if (kse->state.priority == SDEI_EVENT_PRIORITY_NORMAL && + (!list_empty(&vsdei->critical_events) || + !list_empty(&vsdei->normal_events))) { + ret = -ENOSPC; + goto unlock_vcpu; + } + } + + /* Check if the vcpu event exists */ + ksve = kvm_sdei_find_vcpu_event(vcpu, num); + if (ksve) { + kske->state.refcount++; + ksve->state.refcount++; + kvm_make_request(KVM_REQ_SDEI, vcpu); + goto unlock_vcpu; + } + + /* Allocate vcpu event */ + ksve = kzalloc(sizeof(*ksve), GFP_KERNEL); + if (!ksve) { + ret = -ENOMEM; + goto unlock_vcpu; + } + + /* + * We should take lock to update KVM event state because its + * reference count might be zero. In that case, the KVM event + * could be destroyed. + */ + kske->state.refcount++; + ksve->state.num = num; + ksve->state.refcount = 1; + ksve->kske = kske; + ksve->vcpu = vcpu; + + if (kse->state.priority == SDEI_EVENT_PRIORITY_CRITICAL) + list_add_tail(&ksve->link, &vsdei->critical_events); + else + list_add_tail(&ksve->link, &vsdei->normal_events); + + kvm_make_request(KVM_REQ_SDEI, vcpu); + +unlock_vcpu: + spin_unlock(&vsdei->lock); +unlock_kvm: + spin_unlock(&ksdei->lock); +out: + return ret; +} + void kvm_sdei_deliver(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -1317,6 +1422,9 @@ long kvm_sdei_vcpu_ioctl(struct kvm_vcpu *vcpu, unsigned long arg) case KVM_SDEI_CMD_SET_VCPU_STATE: ret = kvm_sdei_set_vcpu_state(vcpu, &cmd->ksv_state); break; + case KVM_SDEI_CMD_INJECT_EVENT: + ret = kvm_sdei_inject(vcpu, cmd->num, false); + break; default: ret = -EINVAL; } -- 2.23.0