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 E0133C4338F for ; Sun, 15 Aug 2021 00:15:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C53FB604DC for ; Sun, 15 Aug 2021 00:15:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235552AbhHOAP7 (ORCPT ); Sat, 14 Aug 2021 20:15:59 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:20739 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234750AbhHOAP1 (ORCPT ); Sat, 14 Aug 2021 20:15:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628986497; 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=ldlsga8V9dOzPgtPoG7CPrhnt51NwBQ9YbIGxIArL70=; b=OBufecCFrIMRTsXt3qwSroQpPKfgfbpTEAZda/J+vNBJjlYzJnIEOr9RqhdfHWRXFnrCXN EXoNUQMr56Cz8MQrhlCEONXd9ol+O9apE2muXY7cxobKcpyzVPD/npQlj/ecB7CFa2nWAb HjhjWtDqfOnoPCesgt75mzEU5vbJTXg= 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-298--WMkZ6z4NN-xbRJoIkVcZg-1; Sat, 14 Aug 2021 20:14:56 -0400 X-MC-Unique: -WMkZ6z4NN-xbRJoIkVcZg-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 163CD1082921; Sun, 15 Aug 2021 00:14:55 +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 34D1010074E1; Sun, 15 Aug 2021 00:14:49 +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 08/21] KVM: arm64: Support SDEI_EVENT_STATUS hypercall Date: Sun, 15 Aug 2021 08:13:39 +0800 Message-Id: <20210815001352.81927-9-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_STATUS hypercall. It's used by the guest to retrieve a bitmap to indicate the SDEI event states, including registration, enablement and delivery state. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 50 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index a3ba69dc91cb..b95b8c4455e1 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -367,6 +367,54 @@ static unsigned long kvm_sdei_hypercall_unregister(struct kvm_vcpu *vcpu) return ret; } +static unsigned long kvm_sdei_hypercall_status(struct kvm_vcpu *vcpu) +{ + 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; + unsigned long event_num = smccc_get_arg1(vcpu); + int index = 0; + unsigned long ret = SDEI_SUCCESS; + + /* Sanity check */ + if (!(ksdei && vsdei)) { + ret = SDEI_NOT_SUPPORTED; + goto out; + } + + if (!kvm_sdei_is_valid_event_num(event_num)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + /* + * Check if the KVM event exists. None of the flags + * will be set if it doesn't exist. + */ + spin_lock(&ksdei->lock); + kske = kvm_sdei_find_kvm_event(kvm, event_num); + if (!kske) { + ret = 0; + goto unlock; + } + + index = (kse->state.type == SDEI_EVENT_TYPE_PRIVATE) ? + vcpu->vcpu_idx : 0; + if (kvm_sdei_is_registered(kske, index)) + ret |= (1UL << SDEI_EVENT_STATUS_REGISTERED); + if (kvm_sdei_is_enabled(kske, index)) + ret |= (1UL << SDEI_EVENT_STATUS_ENABLED); + if (kske->state.refcount) + ret |= (1UL << SDEI_EVENT_STATUS_RUNNING); + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { u32 func = smccc_get_function(vcpu); @@ -395,6 +443,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = kvm_sdei_hypercall_unregister(vcpu); break; case SDEI_1_0_FN_SDEI_EVENT_STATUS: + ret = kvm_sdei_hypercall_status(vcpu); + break; case SDEI_1_0_FN_SDEI_EVENT_GET_INFO: case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET: case SDEI_1_0_FN_SDEI_PE_MASK: -- 2.23.0