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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27DADC433F5 for ; Sun, 3 Apr 2022 15:40:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359216AbiDCPmK (ORCPT ); Sun, 3 Apr 2022 11:42:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359225AbiDCPmD (ORCPT ); Sun, 3 Apr 2022 11:42:03 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B18322496C for ; Sun, 3 Apr 2022 08:40:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649000404; 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=9lEo1vYagHbuDvOHHz7jGfQGWnUXmF26JqdCfdJr4Xk=; b=WyEptZain2/z3XgWHGcj4amjgghiLW5411oVgmp+KotzJnEmbbtl9dJvT580db2TnJTgNl yjIpL6N6FAMWtV5UfpyTeTHgNX4GWXwZTSD4z5b0FMr/vuvmiJV44Ofw/ZsRk8FuvN7R8n 03mfap+9tv5pVcxSc2dF4cDaaoyIwvQ= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-280-iVS-vYIFO2CGM-WfXn9xhw-1; Sun, 03 Apr 2022 11:40:00 -0400 X-MC-Unique: iVS-vYIFO2CGM-WfXn9xhw-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AC5CB2999B23; Sun, 3 Apr 2022 15:39:59 +0000 (UTC) Received: from gshan.redhat.com (ovpn-12-82.pek2.redhat.com [10.72.12.82]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B66F9403172; Sun, 3 Apr 2022 15:39:53 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, eauger@redhat.com, oupton@google.com, Jonathan.Cameron@huawei.com, vkuznets@redhat.com, will@kernel.org, shannon.zhaosl@gmail.com, james.morse@arm.com, mark.rutland@arm.com, maz@kernel.org, pbonzini@redhat.com, shan.gavin@gmail.com Subject: [PATCH v6 04/18] KVM: arm64: Support SDEI_EVENT_REGISTER hypercall Date: Sun, 3 Apr 2022 23:38:57 +0800 Message-Id: <20220403153911.12332-5-gshan@redhat.com> In-Reply-To: <20220403153911.12332-1-gshan@redhat.com> References: <20220403153911.12332-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports SDEI_EVENT_REGISTER hypercall, which is used by guest to register event. The event won't be raised until it's registered and enabled. For those KVM owned events, they can't be registered if they aren't exposed. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 78 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 3507e33ec00e..89c1b231cb60 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -25,6 +25,81 @@ static struct kvm_sdei_exposed_event exposed_events[] = { for (idx = 0, event = &exposed_events[0]; \ idx < ARRAY_SIZE(exposed_events); \ idx++, event++) +#define kvm_sdei_for_each_event(vsdei, event, idx) \ + for (idx = 0, event = &vsdei->events[0]; \ + idx < ARRAY_SIZE(exposed_events); \ + idx++, event++) + +static struct kvm_sdei_event *find_event(struct kvm_vcpu *vcpu, + unsigned int num) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_event *event; + int i; + + kvm_sdei_for_each_event(vsdei, event, i) { + if (event->exposed_event->num == num) + return event; + } + + return NULL; +} + +static unsigned long hypercall_register(struct kvm_vcpu *vcpu) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_event *event; + unsigned int num = smccc_get_arg(vcpu, 1); + unsigned long ep_address = smccc_get_arg(vcpu, 2); + unsigned long ep_arg = smccc_get_arg(vcpu, 3); + unsigned long route_mode = smccc_get_arg(vcpu, 4); + unsigned long route_affinity = smccc_get_arg(vcpu, 5); + unsigned long ret = SDEI_SUCCESS; + + if (!kvm_sdei_is_supported(num)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + if (route_mode != SDEI_EVENT_REGISTER_RM_ANY && + route_mode != SDEI_EVENT_REGISTER_RM_PE) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + spin_lock(&vsdei->lock); + + /* + * The event should have been existing. Otherwise, the event + * isn't exposed yet. + */ + event = find_event(vcpu, num); + if (!event) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + /* + * Check if the event has been registered or pending for + * unregistration. + */ + if (kvm_sdei_is_registered(event) || + kvm_sdei_is_unregister_pending(event)) { + ret = SDEI_DENIED; + goto unlock; + } + + event->route_mode = route_mode; + event->route_affinity = route_affinity; + event->ep_address = ep_address; + event->ep_arg = ep_arg; + kvm_sdei_set_registered(event); + +unlock: + spin_unlock(&vsdei->lock); +out: + return ret; +} int kvm_sdei_call(struct kvm_vcpu *vcpu) { @@ -47,6 +122,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) } switch (func) { + case SDEI_1_0_FN_SDEI_EVENT_REGISTER: + ret = hypercall_register(vcpu); + break; default: ret = SDEI_NOT_SUPPORTED; } -- 2.23.0