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 B86BDC433DB for ; Tue, 9 Feb 2021 04:17:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7512164E70 for ; Tue, 9 Feb 2021 04:17:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229721AbhBIEQy (ORCPT ); Mon, 8 Feb 2021 23:16:54 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:57910 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229772AbhBIDwk (ORCPT ); Mon, 8 Feb 2021 22:52:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612842673; 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=qv6I3logkEqrFKBHAcTSKZ8CXuHzBhGguNUvVqUgdvc=; b=C1E5ydZ2fhVxUbPjexAiSdfd4W3n1xuHKNiDCim0A8aH73tm3N5+rdsd29TyiYsXtPd/XV pbnWGulchYiDzQ5O1z1gau6fcSfOJV3hRJWvlFgivJDvYoYGsTUmW8ZEKmjQ0QCH2/g89U OS/PptP1+2eL6euebG0PdEwwkQ54z+4= 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-536-A_BNmwadOO6m_QZ8VhgGqA-1; Mon, 08 Feb 2021 22:28:37 -0500 X-MC-Unique: A_BNmwadOO6m_QZ8VhgGqA-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 A19A6100CC88; Tue, 9 Feb 2021 03:28:35 +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 E0E9919C66; Tue, 9 Feb 2021 03:28:32 +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 10/21] KVM: arm64: Support SDEI_EVENT_ROUTING_SET hypercall Date: Tue, 9 Feb 2021 11:27:22 +0800 Message-Id: <20210209032733.99996-11-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_ROUTING_SET hypercall. It's used by the guest to set route mode and affinity for the registered KVM event. It's only valid for the shared events. It's not allowed to do so when the corresponding event has been raised to the guest. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 64 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 5dfa74b093f1..458695c2394f 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -489,6 +489,68 @@ static unsigned long kvm_sdei_hypercall_info(struct kvm_vcpu *vcpu) return ret; } +static unsigned long kvm_sdei_hypercall_route(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); + unsigned long route_mode = smccc_get_arg2(vcpu); + unsigned long route_affinity = smccc_get_arg3(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; + } + + if (!(route_mode == SDEI_EVENT_REGISTER_RM_ANY || + route_mode == SDEI_EVENT_REGISTER_RM_PE)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + /* Check if the KVM event has been registered */ + spin_lock(&ksdei->lock); + kske = kvm_sdei_find_kvm_event(kvm, event_num); + if (!kske) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + /* Validate KVM event state */ + kse = kske->kse; + if (kse->state.type != SDEI_EVENT_TYPE_SHARED) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + if (!kvm_sdei_is_registered(kske, index) || + kvm_sdei_is_enabled(kske, index) || + kske->state.refcount) { + ret = SDEI_DENIED; + goto unlock; + } + + /* Update state */ + kske->state.route_mode = route_mode; + kske->state.route_affinity = route_affinity; + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { u32 func = smccc_get_function(vcpu); @@ -523,6 +585,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = kvm_sdei_hypercall_info(vcpu); break; case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET: + ret = kvm_sdei_hypercall_route(vcpu); + break; case SDEI_1_0_FN_SDEI_PE_MASK: case SDEI_1_0_FN_SDEI_PE_UNMASK: case SDEI_1_0_FN_SDEI_INTERRUPT_BIND: -- 2.23.0