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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i10-20020a1709064fca00b007adbc807ca8si12182924ejw.137.2022.11.01.07.57.30; Tue, 01 Nov 2022 07:57:54 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=FJmRnDZA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231178AbiKAO4m (ORCPT + 99 others); Tue, 1 Nov 2022 10:56:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230440AbiKAO4O (ORCPT ); Tue, 1 Nov 2022 10:56:14 -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 ESMTPS id D3BE86381 for ; Tue, 1 Nov 2022 07:55:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1667314510; 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=OYQ5cU/60jNuZcycVdq58PLDiIjTc3kSZzYvnPsyXKw=; b=FJmRnDZA98Yxn7gyfLOMRWWWf2hwKvHCMsdNrI0yvKoW5OD+hCTmd9PPh5f1cUpLQ3Jaq3 q2BdhLGfybP570ftnN0fgQBwcxbYSz+mWwW9jOBTs19mTvw+pszBKkBNqMSQpfrC+XW506 UOWCU4Hyakmho4XSRtYBy7MzSfZyha8= 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-639-o5mE9aNPPuC7Tv_K2EB36w-1; Tue, 01 Nov 2022 10:55:07 -0400 X-MC-Unique: o5mE9aNPPuC7Tv_K2EB36w-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B1A8E1C16EA3; Tue, 1 Nov 2022 14:55:04 +0000 (UTC) Received: from ovpn-194-149.brq.redhat.com (ovpn-194-149.brq.redhat.com [10.40.194.149]) by smtp.corp.redhat.com (Postfix) with ESMTP id 56F1EC15BA5; Tue, 1 Nov 2022 14:55:02 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini , Sean Christopherson Cc: Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v13 13/48] KVM: x86: Prepare kvm_hv_flush_tlb() to handle L2's GPAs Date: Tue, 1 Nov 2022 15:53:51 +0100 Message-Id: <20221101145426.251680-14-vkuznets@redhat.com> In-Reply-To: <20221101145426.251680-1-vkuznets@redhat.com> References: <20221101145426.251680-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 X-Spam-Status: No, score=-3.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748306152642136423?= X-GMAIL-MSGID: =?utf-8?q?1748306152642136423?= To handle L2 TLB flush requests, KVM needs to translate the specified L2 GPA to L1 GPA to read hypercall arguments from there. No functional change as KVM doesn't handle VMCALL/VMMCALL from L2 yet. Reviewed-by: Maxim Levitsky Reviewed-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/hyperv.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index fca9c51891f5..cb145987f5b8 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -23,6 +23,7 @@ #include "ioapic.h" #include "cpuid.h" #include "hyperv.h" +#include "mmu.h" #include "xen.h" #include @@ -1908,6 +1909,19 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc) */ BUILD_BUG_ON(KVM_HV_MAX_SPARSE_VCPU_SET_BITS > 64); + /* + * 'Slow' hypercall's first parameter is the address in guest's memory + * where hypercall parameters are placed. This is either a GPA or a + * nested GPA when KVM is handling the call from L2 ('direct' TLB + * flush). Translate the address here so the memory can be uniformly + * read with kvm_read_guest(). + */ + if (!hc->fast && is_guest_mode(vcpu)) { + hc->ingpa = translate_nested_gpa(vcpu, hc->ingpa, 0, NULL); + if (unlikely(hc->ingpa == INVALID_GPA)) + return HV_STATUS_INVALID_HYPERCALL_INPUT; + } + if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST || hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE) { if (hc->fast) {