From nobody Mon Feb 9 13:59:03 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 570FBEB64DD for ; Tue, 25 Jul 2023 22:25:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232934AbjGYWZg (ORCPT ); Tue, 25 Jul 2023 18:25:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233072AbjGYWXY (ORCPT ); Tue, 25 Jul 2023 18:23:24 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F2F93C01; Tue, 25 Jul 2023 15:18:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690323525; x=1721859525; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=18s/5jF2F7qugI8wqlhLGvFV9SRmY3sKou5s8wvtIz8=; b=hVfo5+3KnyiRDALOsfshWuh/tGRYWwxCOPEpTVCM6rmuTsIgI8Vj/ud0 xe9SVWb5IjX254YjhQEUN+yOrE+4+/bnfjfU+lO9ooZbud6YinHUkDDfa EV2uUqT667V+IHFuw/FDf8zXo1nwfkPJQUlfzIdVlzq5jqoJAKbI/akv+ cezn4EDu9TGbprWMOFlolnnosQUkDNWB9AwsbUC+IYvaoR/z3klQLQOQ7 yCddefdR4s6+G3mgbWtouuLWOrg3mRj98uG6XpYtVT0MMlU2cwjlHKP7R 5es4TM7cQgBGFytLnHnGY10QG7KRn84c1r54fSlpE8lpOCLuXPsnRymTY Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="367882736" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="367882736" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 15:16:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="840001932" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="840001932" Received: from ls.sc.intel.com (HELO localhost) ([172.25.112.31]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 15:16:06 -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 , David Matlack , Kai Huang , Zhi Wang , chen.bo@intel.com, hang.yuan@intel.com, tina.zhang@intel.com Subject: [PATCH v15 100/115] KVM: TDX: Handle TDG.VP.VMCALL hypercall Date: Tue, 25 Jul 2023 15:14:51 -0700 Message-Id: <590ced75e0bf1b003b755adfeac8622653d7e321.1690322424.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 Implement TDG.VP.VMCALL hypercall. If the input value is zero, return success code and zero in output registers. TDG.VP.VMCALL hypercall is a subleaf of TDG.VP.VMCALL to enumerate which TDG.VP.VMCALL sub leaves are supported. This hypercall is for future enhancement of the Guest-Host-Communication Interface (GHCI) specification. The GHCI version of 344426-001US defines it to require input R12 to be zero and to return zero in output registers, R11, R12, R13, and R14 so that guest TD enumerates no enhancement. Signed-off-by: Isaku Yamahata --- arch/x86/kvm/vmx/tdx.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 77052f49481a..639fab4fc2cb 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1236,6 +1236,20 @@ static int tdx_emulate_wrmsr(struct kvm_vcpu *vcpu) return 1; } =20 +static int tdx_get_td_vm_call_info(struct kvm_vcpu *vcpu) +{ + if (tdvmcall_a0_read(vcpu)) + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_INVALID_OPERAND); + else { + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_SUCCESS); + kvm_r11_write(vcpu, 0); + tdvmcall_a0_write(vcpu, 0); + tdvmcall_a1_write(vcpu, 0); + tdvmcall_a2_write(vcpu, 0); + } + return 1; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { if (tdvmcall_exit_type(vcpu)) @@ -1254,6 +1268,8 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu) return tdx_emulate_rdmsr(vcpu); case EXIT_REASON_MSR_WRITE: return tdx_emulate_wrmsr(vcpu); + case TDG_VP_VMCALL_GET_TD_VM_CALL_INFO: + return tdx_get_td_vm_call_info(vcpu); default: break; } --=20 2.25.1