From nobody Sat Apr 11 21:11:13 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 09654C25B08 for ; Sun, 7 Aug 2022 22:13:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236745AbiHGWNp (ORCPT ); Sun, 7 Aug 2022 18:13:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237114AbiHGWJH (ORCPT ); Sun, 7 Aug 2022 18:09:07 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA49ABE38; Sun, 7 Aug 2022 15:03:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1659909809; x=1691445809; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cJI1s3Vuc5aCICtzXw49h+6EHisgt0Ocvb3uwxgxGBQ=; b=cWNI76cdKMG0rCz3a9a3pR+wdmBmMNYaeq/ulGPaSgKVo3K2GPX1xaGD 2YXfIqbTygk6tC74/YBz0p9YCE20RIAhiFTTHuQVKXlu2rstg5EWwYI4o ngOul0ffpYWMjUvF5CMQVJYmGPqo/VSDi9ZDFgXF5aBHW9KVZqG6lxGih zlumr4ZeDkIOce6Y7DJqbH6CksoscSqwID5px/E4qbXLTClGVrXUaPgMx YvL9Rgtx0kG/qqX08p4tLI4WfIHDtUifwE32sRtwk0Z8fMmwSxaY2ddwB 4+2Bp39lSeKhsdh5JLdJeQw3mcLsZUmtQmtR2FoCTAvGCw+8nEOW21KJU g==; X-IronPort-AV: E=McAfee;i="6400,9594,10432"; a="270240416" X-IronPort-AV: E=Sophos;i="5.93,220,1654585200"; d="scan'208";a="270240416" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Aug 2022 15:02:44 -0700 X-IronPort-AV: E=Sophos;i="5.93,220,1654585200"; d="scan'208";a="663682764" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Aug 2022 15:02:44 -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 v8 097/103] KVM: TDX: Handle TDX PV map_gpa hypercall Date: Sun, 7 Aug 2022 15:02:22 -0700 Message-Id: <45db7173c1f02d8be7129f9bea0624e7127ab55a.1659854791.git.isaku.yamahata@intel.com> 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 6131be42c721..47b3e5e591f4 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1210,6 +1210,37 @@ 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)) @@ -1230,6 +1261,8 @@ 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