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 9D190C64ED6 for ; Mon, 27 Feb 2023 08:31:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230242AbjB0IbT (ORCPT ); Mon, 27 Feb 2023 03:31:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231856AbjB0IaA (ORCPT ); Mon, 27 Feb 2023 03:30:00 -0500 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE7B01CAF8; Mon, 27 Feb 2023 00:26:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1677486394; x=1709022394; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0RQI1RE12dXIaLvzePk/bGkx3f7Xb/jOfdXmZgioVYo=; b=ZVl2AMkbnL0BrZOiMRTr9FTyxtsHR3RkGZDdH6m0sS19rR3C9W1PROII ZBYtj8raQXLtKpv+/RMjPuUp/RznKl5tGp82ScmzSbhfsvL11ys0c3r62 OUIOLF0qp0C5IEWsIrjHcPvkGJxlAqeMnn2cR8ixDBpwsRzWUtug+Ke5W NL3Xgdq+84ZsNLCeYRdujQ9tj7yQRfQM1cPiE6nCnrQNb7QLld++dlzOk 80z/CJxxjQKDuTrRETlZ25/guC2NKgCVIPfkwyxODoVrzygBB6I0nQWuL 6JzZeP9xCGdGMe5oQrHK5kDfQHzyrDM6SjFB+OeLZqic+x0cIshbDKfVc w==; X-IronPort-AV: E=McAfee;i="6500,9779,10633"; a="317609072" X-IronPort-AV: E=Sophos;i="5.97,331,1669104000"; d="scan'208";a="317609072" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2023 00:24:19 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10633"; a="783242415" X-IronPort-AV: E=Sophos;i="5.97,331,1669104000"; d="scan'208";a="783242415" 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; 27 Feb 2023 00:24:19 -0800 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 Subject: [PATCH v12 092/106] KVM: TDX: Handle TDG.VP.VMCALL hypercall Date: Mon, 27 Feb 2023 00:23:31 -0800 Message-Id: <2b22361d1decea80492eff3ec87d87ca16a0e9c5.1677484918.git.isaku.yamahata@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 08a4e63e4aea..35c6875d3bef 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1225,6 +1225,20 @@ static int tdx_emulate_wrmsr(struct kvm_vcpu *vcpu) return 1; } +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 tdx_map_gpa(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -1294,6 +1308,8 @@ 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); case TDG_VP_VMCALL_REPORT_FATAL_ERROR: /* * Exit to userspace device model for tear down. -- 2.25.1