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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 95767C4338F for ; Sun, 15 Aug 2021 00:15:53 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 44A84604DC for ; Sun, 15 Aug 2021 00:15:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 44A84604DC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id EBC124B0C6; Sat, 14 Aug 2021 20:15:52 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@redhat.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ym0m07CorGMI; Sat, 14 Aug 2021 20:15:49 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 16F024B0A1; Sat, 14 Aug 2021 20:15:49 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 351074B0BD for ; Sat, 14 Aug 2021 20:15:48 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XJM7GDKZgOFY for ; Sat, 14 Aug 2021 20:15:47 -0400 (EDT) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4DA774AC78 for ; Sat, 14 Aug 2021 20:15:47 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628986547; 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=IIjQhY1IlZ4+ReDJ9ZXVyX310WFzvKONotrGUTTvkbUvfTWMuume1R/34Qw4QmALpnhKQ6 cGnFBuu2HvstgeXMVB+SFTO7mFuwt6yiVZPZlEeleWdpS/wFC4ETczTnLI53/FFM+uP3u/ hkDy7noBmgbSyCtQ6YcgbeeX7Vlg2CE= 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 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 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Cc: maz@kernel.org, linux-kernel@vger.kernel.org, Jonathan.Cameron@huawei.com, pbonzini@redhat.com, will@kernel.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm