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=-16.4 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=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 7D7C5C433B4 for ; Fri, 7 May 2021 06:32:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5FB5F61154 for ; Fri, 7 May 2021 06:32:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234731AbhEGGdh (ORCPT ); Fri, 7 May 2021 02:33:37 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:26852 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234665AbhEGGdQ (ORCPT ); Fri, 7 May 2021 02:33:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620369137; 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=EIDwCkL9mTzseLSOiYSJi53v9LCFA/ZgcOnwxmcbcnA=; b=LPyNDrH8fVAKkes5i+rrYdAXtuB13WL5ccVisYOo1abYfEcGNqIMnFqRnHsQ5Ar2PJrTV0 y9MBrKPp2ZYrICVtMWcBcolzoZWJybVECKSVsEycvXYenXXddjbF4fv7BEoT8E1bAxegj2 SSuUEOIefdF5Em9S+ZUzdx+TI48ptVM= 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-559-IGdj0MP5OrSa06Vd3W50IA-1; Fri, 07 May 2021 02:32:15 -0400 X-MC-Unique: IGdj0MP5OrSa06Vd3W50IA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7DAD4195D560; Fri, 7 May 2021 06:32:13 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-42.bne.redhat.com [10.64.54.42]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1ACC25D9DE; Fri, 7 May 2021 06:32:09 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, maz@kernel.org, will@kernel.org, pbonzini@redhat.com, james.morse@arm.com, mark.rutland@arm.com, Jonathan.Cameron@huawei.com, shan.gavin@gmail.com Subject: [PATCH v3 11/21] KVM: arm64: Support SDEI_PE_{MASK, UNMASK} hypercall Date: Fri, 7 May 2021 16:31:14 +0800 Message-Id: <20210507083124.43347-12-gshan@redhat.com> In-Reply-To: <20210507083124.43347-1-gshan@redhat.com> References: <20210507083124.43347-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports SDEI_PE_{MASK, UNMASK} hypercall. They are used by the guest to stop the specific vCPU from receiving SDEI events. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 458695c2394f..3fb33258b494 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -551,6 +551,37 @@ static unsigned long kvm_sdei_hypercall_route(struct kvm_vcpu *vcpu) return ret; } +static unsigned long kvm_sdei_hypercall_mask(struct kvm_vcpu *vcpu, + bool mask) +{ + struct kvm *kvm = vcpu->kvm; + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + unsigned long ret = SDEI_SUCCESS; + + /* Sanity check */ + if (!(ksdei && vsdei)) { + ret = SDEI_NOT_SUPPORTED; + goto out; + } + + spin_lock(&vsdei->lock); + + /* Check the state */ + if (mask == vsdei->state.masked) { + ret = SDEI_DENIED; + goto unlock; + } + + /* Update the state */ + vsdei->state.masked = mask ? 1 : 0; + +unlock: + spin_unlock(&vsdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { u32 func = smccc_get_function(vcpu); @@ -588,7 +619,11 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = kvm_sdei_hypercall_route(vcpu); break; case SDEI_1_0_FN_SDEI_PE_MASK: + ret = kvm_sdei_hypercall_mask(vcpu, true); + break; case SDEI_1_0_FN_SDEI_PE_UNMASK: + ret = kvm_sdei_hypercall_mask(vcpu, false); + break; case SDEI_1_0_FN_SDEI_INTERRUPT_BIND: case SDEI_1_0_FN_SDEI_INTERRUPT_RELEASE: case SDEI_1_0_FN_SDEI_PRIVATE_RESET: -- 2.23.0