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=-16.3 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 AA71EC433E0 for ; Tue, 9 Feb 2021 03:58:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 51A0764E99 for ; Tue, 9 Feb 2021 03:58:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229851AbhBID5Q (ORCPT ); Mon, 8 Feb 2021 22:57:16 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:53636 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229850AbhBIDmj (ORCPT ); Mon, 8 Feb 2021 22:42:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612842031; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=don4VHjHopsCMtt34Rk36cCcgweAx/6W5SIQ1y5aSdA=; b=XDim6fZ4HwlidmbaFreZXbBpDjRzyLuyFeFx1btzZ7MIqyNSZ/3o51he2OxzjLow714lCj MH/y8fSpE/dOstkvD39TYqSJk3pU9Rulq3IBBZtC1xWHMMMmwUg8UNXzBpkJxYn5fFK/EZ l88SHZlmeMcPAJipZzwUoJ2veP4PRz0= 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-430-VYdVfHs6PBqyeyuo_jY8BQ-1; Mon, 08 Feb 2021 22:29:09 -0500 X-MC-Unique: VYdVfHs6PBqyeyuo_jY8BQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D2349107ACC7; Tue, 9 Feb 2021 03:29:07 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-26.bne.redhat.com [10.64.54.26]) by smtp.corp.redhat.com (Postfix) with ESMTP id 715E719C66; Tue, 9 Feb 2021 03:29:02 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, pbonzini@redhat.com, maz@kernel.org, james.morse@arm.com, Jonathan.Cameron@huawei.com, mark.rutland@arm.com, will@kernel.org, shan.gavin@gmail.com Subject: [PATCH v2 18/21] KVM: arm64: Support SDEI event injection Date: Tue, 9 Feb 2021 11:27:30 +0800 Message-Id: <20210209032733.99996-19-gshan@redhat.com> In-Reply-To: <20210209032733.99996-1-gshan@redhat.com> References: <20210209032733.99996-1-gshan@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 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 3485843dd6df..232092de5e21 100644 --- a/arch/arm64/include/uapi/asm/kvm_sdei.h +++ b/arch/arm64/include/uapi/asm/kvm_sdei.h @@ -64,6 +64,7 @@ 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 { uint32_t 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