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 2C352C4338F for ; Sun, 15 Aug 2021 00:14:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A27F60F21 for ; Sun, 15 Aug 2021 00:14:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234879AbhHOAPU (ORCPT ); Sat, 14 Aug 2021 20:15:20 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:40116 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234603AbhHOAPM (ORCPT ); Sat, 14 Aug 2021 20:15:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628986483; 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=fkw3mJqS3pBDC+aanz8yHsGj1AbHq5g++Wkg6vpucq8=; b=bOvfdpAws91hk7kkn/N0F6iO+Thc9ulY8A0FM7HcwA/BEv3v8g0xqtGdXwlUpufSG5xznW yGExSthZBKgzheF0AudtYfgQis64vyXa2PeSUpdE0/VjwPufRN6noMMk7WOCVQOYstq6iC BY3QJNlat5W2e9W1phXZKOGotfwQe0g= 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-446-X54qic6NOzuKUcFWJQGk6Q-1; Sat, 14 Aug 2021 20:14:41 -0400 X-MC-Unique: X54qic6NOzuKUcFWJQGk6Q-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 6D3691082921; Sun, 15 Aug 2021 00:14:40 +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 7D65610016FF; Sun, 15 Aug 2021 00:14:35 +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 05/21] KVM: arm64: Support SDEI_EVENT_{ENABLE, DISABLE} hypercall Date: Sun, 15 Aug 2021 08:13:36 +0800 Message-Id: <20210815001352.81927-6-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_{ENABLE, DISABLE} hypercall. After SDEI event is registered by guest, it won't be delivered to the guest until it's enabled. On the other hand, the SDEI event won't be raised to the guest or specific vCPU if it's has been disabled on the guest or specific vCPU. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 68 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index d3ea3eee154b..b022ce0a202b 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -206,6 +206,70 @@ static unsigned long kvm_sdei_hypercall_register(struct kvm_vcpu *vcpu) return ret; } +static unsigned long kvm_sdei_hypercall_enable(struct kvm_vcpu *vcpu, + bool enable) +{ + 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 */ + spin_lock(&ksdei->lock); + kske = kvm_sdei_find_kvm_event(kvm, event_num); + if (!kske) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + /* Check if there is pending events */ + if (kske->state.refcount) { + ret = SDEI_PENDING; + goto unlock; + } + + /* Check if it has been registered */ + kse = kske->kse; + index = (kse->state.type == SDEI_EVENT_TYPE_PRIVATE) ? + vcpu->vcpu_idx : 0; + if (!kvm_sdei_is_registered(kske, index)) { + ret = SDEI_DENIED; + goto unlock; + } + + /* Verify its enablement state */ + if (enable == kvm_sdei_is_enabled(kske, index)) { + ret = SDEI_DENIED; + goto unlock; + } + + /* Update enablement state */ + if (enable) + kvm_sdei_set_enabled(kske, index); + else + kvm_sdei_clear_enabled(kske, index); + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { u32 func = smccc_get_function(vcpu); @@ -220,7 +284,11 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = kvm_sdei_hypercall_register(vcpu); break; case SDEI_1_0_FN_SDEI_EVENT_ENABLE: + ret = kvm_sdei_hypercall_enable(vcpu, true); + break; case SDEI_1_0_FN_SDEI_EVENT_DISABLE: + ret = kvm_sdei_hypercall_enable(vcpu, false); + break; case SDEI_1_0_FN_SDEI_EVENT_CONTEXT: case SDEI_1_0_FN_SDEI_EVENT_COMPLETE: case SDEI_1_0_FN_SDEI_EVENT_COMPLETE_AND_RESUME: -- 2.23.0