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 A0A53C433EF for ; Fri, 27 May 2022 08:06:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229799AbiE0IG1 (ORCPT ); Fri, 27 May 2022 04:06:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349538AbiE0IFz (ORCPT ); Fri, 27 May 2022 04:05:55 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 38C5E104CB3 for ; Fri, 27 May 2022 01:05:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1653638748; 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=9CfhejkXuPa7WByuloODhCqAxTblZ1S6BbTJI/JlxSk=; b=H4TxWfSTloVWg5uz34FyZyE4oq/Xei6kkoW0QEGnOW5bSLUrkbAIZsv8GWjcmQjjWQa1Ac GG9LoUogh2grYaYKFPJzr4K7tAkJf/yzMNDsQGE3nhxs0mKk6hkdvEY0deIlVO2TdvppyX VbcQcSzfaGug5LVCUjXkHqIB1i7XcDo= 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-287-9XtA_8I5PWyJEkWbwAHphQ-1; Fri, 27 May 2022 04:05:41 -0400 X-MC-Unique: 9XtA_8I5PWyJEkWbwAHphQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2B34B1C161B3; Fri, 27 May 2022 08:05:41 +0000 (UTC) Received: from gshan.redhat.com (ovpn-12-91.pek2.redhat.com [10.72.12.91]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A7D442026D64; Fri, 27 May 2022 08:05:30 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: maz@kernel.org, linux-kernel@vger.kernel.org, eauger@redhat.com, oupton@google.com, Jonathan.Cameron@huawei.com, pbonzini@redhat.com, vkuznets@redhat.com, will@kernel.org, james.morse@arm.com, mark.rutland@arm.com, shannon.zhaosl@gmail.com, shijie@amperemail.onmicrosoft.com, shan.gavin@gmail.com Subject: [PATCH v7 14/22] KVM: arm64: Support EVENT_SIGNAL hypercall Date: Fri, 27 May 2022 16:02:45 +0800 Message-Id: <20220527080253.1562538-15-gshan@redhat.com> In-Reply-To: <20220527080253.1562538-1-gshan@redhat.com> References: <20220527080253.1562538-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports EVENT_SIGNAL hypercall. It's used to inject the software signaled event, whose number is zero. The KVM_REQ_SDEI request is raised if the PE is unmasked and the event has been enabled. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 28 ++++++++++++++++++++++++++++ include/uapi/linux/arm_sdei.h | 3 +++ 2 files changed, 31 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 0bea1b2f9452..a55797fce06a 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -232,6 +232,31 @@ static unsigned long pe_mask(struct kvm_vcpu *vcpu, bool mask) return SDEI_SUCCESS; } +static unsigned long event_signal(struct kvm_vcpu *vcpu) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + unsigned int num = smccc_get_arg(vcpu, 1); + + if (num >= KVM_NR_SDEI_EVENTS) + return SDEI_INVALID_PARAMETERS; + + /* + * The event must be software signaled event, whose + * number is zero. + */ + if (num != SDEI_SW_SIGNALED_EVENT || + !test_bit(num, &vsdei->registered)) + return SDEI_INVALID_PARAMETERS; + + if (!test_and_set_bit(num, &vsdei->pending)) { + if (!(vcpu->arch.flags & KVM_ARM64_SDEI_MASKED) && + test_bit(num, &vsdei->enabled)) + kvm_make_request(KVM_REQ_SDEI, vcpu); + } + + return SDEI_SUCCESS; +} + static unsigned long event_reset(struct kvm_vcpu *vcpu, bool private) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -303,6 +328,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) case SDEI_1_0_FN_SDEI_PE_UNMASK: ret = pe_mask(vcpu, false); break; + case SDEI_1_1_FN_SDEI_EVENT_SIGNAL: + ret = event_signal(vcpu); + break; case SDEI_1_0_FN_SDEI_PRIVATE_RESET: ret = event_reset(vcpu, true); break; diff --git a/include/uapi/linux/arm_sdei.h b/include/uapi/linux/arm_sdei.h index af0630ba5437..72b07114bbfa 100644 --- a/include/uapi/linux/arm_sdei.h +++ b/include/uapi/linux/arm_sdei.h @@ -22,9 +22,12 @@ #define SDEI_1_0_FN_SDEI_PE_UNMASK SDEI_1_0_FN(0x0C) #define SDEI_1_0_FN_SDEI_INTERRUPT_BIND SDEI_1_0_FN(0x0D) #define SDEI_1_0_FN_SDEI_INTERRUPT_RELEASE SDEI_1_0_FN(0x0E) +#define SDEI_1_1_FN_SDEI_EVENT_SIGNAL SDEI_1_0_FN(0x0F) #define SDEI_1_0_FN_SDEI_PRIVATE_RESET SDEI_1_0_FN(0x11) #define SDEI_1_0_FN_SDEI_SHARED_RESET SDEI_1_0_FN(0x12) +#define SDEI_SW_SIGNALED_EVENT 0 + #define SDEI_VERSION_MAJOR_SHIFT 48 #define SDEI_VERSION_MAJOR_MASK 0x7fff #define SDEI_VERSION_MINOR_SHIFT 32 -- 2.23.0