From mboxrd@z Thu Jan 1 00:00:00 1970 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 85BE4C43334 for ; Mon, 27 Jun 2022 21:58:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242096AbiF0V6a (ORCPT ); Mon, 27 Jun 2022 17:58:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60412 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241242AbiF0Vzv (ORCPT ); Mon, 27 Jun 2022 17:55:51 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BD68817E24; Mon, 27 Jun 2022 14:55:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1656366908; x=1687902908; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=jSrS5oiO5IBfcWPeUPov/rhPiMcio5Bnjv4uVfJnZGA=; b=VcSf/qjU4gyyQMbNfemE1cBHr9L8fIQCwowxsAbXEzQiAdAoOylDJgiv VduJLCVBEg3FEjoJ2mY+gT9+5yEUCFrUgLJ0DKUG7EKpHdEc7k0UIuGSG LFjKVnuT2ByW7yWQGZsAaWX6L+ln81aEsdVfGsV84XsLHTzOXfzhqJWwd Tn+8AFTfgSYk2kPOsV0DRyHd3GuxrTYojkeXDKXvDABSCC+iBClq7iFUo 2/WWuf2AnRNt01XvHXXugCWiUz9p9U4oVgn1zh4kDWLGQ4lk4eXpr2wGu 6AJlINB9ziBaGVSIc/w9AeoeRXApY9KrWWg8TMjSROcm/aIoEjHmBzSyh g==; X-IronPort-AV: E=McAfee;i="6400,9594,10391"; a="279116146" X-IronPort-AV: E=Sophos;i="5.92,227,1650956400"; d="scan'208";a="279116146" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2022 14:55:02 -0700 X-IronPort-AV: E=Sophos;i="5.92,227,1650956400"; d="scan'208";a="657863750" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2022 14:55:02 -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 Subject: [PATCH v7 094/102] KVM: TDX: Handle TDX PV rdmsr/wrmsr hypercall Date: Mon, 27 Jun 2022 14:54:26 -0700 Message-Id: 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: kvm@vger.kernel.org From: Isaku Yamahata Wire up TDX PV rdmsr/wrmsr hypercall to the KVM backend function. Signed-off-by: Isaku Yamahata Reviewed-by: Paolo Bonzini --- arch/x86/kvm/vmx/tdx.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 162cab67d1ef..dc66c799cae8 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1170,6 +1170,39 @@ static int tdx_emulate_mmio(struct kvm_vcpu *vcpu) return 1; } +static int tdx_emulate_rdmsr(struct kvm_vcpu *vcpu) +{ + u32 index = tdvmcall_a0_read(vcpu); + u64 data; + + if (kvm_get_msr(vcpu, index, &data)) { + trace_kvm_msr_read_ex(index); + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_INVALID_OPERAND); + return 1; + } + trace_kvm_msr_read(index, data); + + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_SUCCESS); + tdvmcall_set_return_val(vcpu, data); + return 1; +} + +static int tdx_emulate_wrmsr(struct kvm_vcpu *vcpu) +{ + u32 index = tdvmcall_a0_read(vcpu); + u64 data = tdvmcall_a1_read(vcpu); + + if (kvm_set_msr(vcpu, index, data)) { + trace_kvm_msr_write_ex(index, data); + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_INVALID_OPERAND); + return 1; + } + + trace_kvm_msr_write(index, data); + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_SUCCESS); + return 1; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { if (tdvmcall_exit_type(vcpu)) @@ -1184,6 +1217,10 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu) return tdx_emulate_io(vcpu); case EXIT_REASON_EPT_VIOLATION: return tdx_emulate_mmio(vcpu); + case EXIT_REASON_MSR_READ: + return tdx_emulate_rdmsr(vcpu); + case EXIT_REASON_MSR_WRITE: + return tdx_emulate_wrmsr(vcpu); default: break; } -- 2.25.1