From nobody Mon Feb 9 01:47:38 2026 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 BF515C433F5 for ; Fri, 30 Sep 2022 10:28:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232586AbiI3K17 (ORCPT ); Fri, 30 Sep 2022 06:27:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55170 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232491AbiI3KZY (ORCPT ); Fri, 30 Sep 2022 06:25:24 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D8B236405; Fri, 30 Sep 2022 03:19:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664533200; x=1696069200; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=CEku3Y+5uD95iizZnUIZvdPui7y5N0fIpv5aBviNf2w=; b=Ab01ajwDbNhkdhb1llHFTlOs4fpcibA4IptKRdH+aQq+4dEfIX5rXaUT b6yGUPVeg7FI966LSnY+M+PncA8JmsJENuX6ingEr2h2/i2K2rZ8TWj1S hWvlub94utUL6OWdIAvktT3xJo4Ppv0F4t/VOrcyuJBKxdMC3nj8dPnRd j8E1vpXvNmucqhe5gDrgC1/F+A3NNQa/P/IcU8nrhrTQ9zduJ6wE8fnhF Cf1+SLFg8Zjv89HzZrKN8Xizaz/Tnpjztj4m42Z8dwyuVC83nCZ0nUu4c bUyhORQyPwslCE2jrr4BZKe+CCw3/C0h2t8r3hjtsHP67WTOsGRl0KHkO w==; X-IronPort-AV: E=McAfee;i="6500,9779,10485"; a="328540179" X-IronPort-AV: E=Sophos;i="5.93,358,1654585200"; d="scan'208";a="328540179" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2022 03:19:08 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10485"; a="726807830" X-IronPort-AV: E=Sophos;i="5.93,358,1654585200"; d="scan'208";a="726807830" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2022 03:19:08 -0700 From: isaku.yamahata@intel.com To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Paolo Bonzini , erdemaktas@google.com, Sean Christopherson , Sagi Shahar Subject: [PATCH v9 098/105] KVM: TDX: Handle TDX PV map_gpa hypercall Date: Fri, 30 Sep 2022 03:18:32 -0700 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Isaku Yamahata Wire up TDX PV map_gpa hypercall to the kvm/mmu backend. Signed-off-by: Isaku Yamahata --- arch/x86/kvm/vmx/tdx.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index a7cf08d60744..6318c0c09c0d 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1078,6 +1078,37 @@ static int tdx_report_fatal_error(struct kvm_vcpu *v= cpu) return 0; } =20 +static int tdx_map_gpa(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm =3D vcpu->kvm; + gpa_t gpa =3D tdvmcall_a0_read(vcpu); + gpa_t size =3D tdvmcall_a1_read(vcpu); + gpa_t end =3D gpa + size; + gfn_t s =3D gpa_to_gfn(gpa) & ~kvm_gfn_shared_mask(kvm); + gfn_t e =3D gpa_to_gfn(end) & ~kvm_gfn_shared_mask(kvm); + bool map_private =3D kvm_is_private_gpa(kvm, gpa); + int ret; + + if (!IS_ALIGNED(gpa, 4096) || !IS_ALIGNED(size, 4096) || + end < gpa || + end > kvm_gfn_shared_mask(kvm) << (PAGE_SHIFT + 1) || + kvm_is_private_gpa(kvm, gpa) !=3D kvm_is_private_gpa(kvm, end)) { + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_INVALID_OPERAND); + return 1; + } + + ret =3D kvm_mmu_map_gpa(vcpu, &s, e, map_private); + if (ret =3D=3D -EAGAIN) { + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_RETRY); + tdvmcall_set_return_val(vcpu, gfn_to_gpa(s)); + } else if (ret) + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_INVALID_OPERAND); + else + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_SUCCESS); + + return 1; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { if (tdvmcall_exit_type(vcpu)) @@ -1098,6 +1129,8 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu) return tdx_emulate_wrmsr(vcpu); case TDG_VP_VMCALL_REPORT_FATAL_ERROR: return tdx_report_fatal_error(vcpu); + case TDG_VP_VMCALL_MAP_GPA: + return tdx_map_gpa(vcpu); default: break; } --=20 2.25.1