From nobody Sun Sep 7 12:28:25 2025 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 DF385CDB482 for ; Mon, 16 Oct 2023 16:32:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234121AbjJPQcp (ORCPT ); Mon, 16 Oct 2023 12:32:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233969AbjJPQb5 (ORCPT ); Mon, 16 Oct 2023 12:31:57 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2F0AD4C2B; Mon, 16 Oct 2023 09:21:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697473269; x=1729009269; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MyMZbxBs64n/RgUrYgycCLns9IrLs3zX0v4Q/4yMLvc=; b=HMYdNcvbsEucyjr5grnha4ZapufIFim4vZ/V3dmv5Q2rlsuwbmqwwG8h kr5T58LtFuXhhH2p6Lad1mJwK1ylEiq81XtICyschmzaYZ6RGI4r6NC2W sK1TWSNVXcw6n/W0BtbTKgT0PJd+NzF/4Sl/7m1F3FuWly3SVCoMwB5Id KWKCk3yaMScBGHo0fMlRoPetNv/BJy21vw2NYzVXqKWax5PAGjTiL7WVK RYIUM/NEQtoptaLj0vqbIWYsth7hgQjG7BEnrrPXtnBu146JllOK1Pffe AyMSA46jVpsoTqa3dP72b4hObq2Pk7OiR7zRqPn4HCYLcxN9kr3fc9aYC g==; X-IronPort-AV: E=McAfee;i="6600,9927,10865"; a="364922073" X-IronPort-AV: E=Sophos;i="6.03,229,1694761200"; d="scan'208";a="364922073" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2023 09:16:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10865"; a="846448326" X-IronPort-AV: E=Sophos;i="6.03,229,1694761200"; d="scan'208";a="846448326" Received: from ls.sc.intel.com (HELO localhost) ([172.25.112.31]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2023 09:16:06 -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 v16 096/116] KVM: TDX: Handle TDX PV rdmsr/wrmsr hypercall Date: Mon, 16 Oct 2023 09:14:48 -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 rdmsr/wrmsr hypercall to the KVM backend function. Signed-off-by: Isaku Yamahata Reviewed-by: Paolo Bonzini --- arch/x86/kvm/vmx/tdx.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 7e24683e430b..41f7ad98cab5 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1307,6 +1307,41 @@ static int tdx_emulate_mmio(struct kvm_vcpu *vcpu) return 1; } =20 +static int tdx_emulate_rdmsr(struct kvm_vcpu *vcpu) +{ + u32 index =3D tdvmcall_a0_read(vcpu); + u64 data; + + if (!kvm_msr_allowed(vcpu, index, KVM_MSR_FILTER_READ) || + 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 =3D tdvmcall_a0_read(vcpu); + u64 data =3D tdvmcall_a1_read(vcpu); + + if (!kvm_msr_allowed(vcpu, index, KVM_MSR_FILTER_WRITE) || + 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)) @@ -1321,6 +1356,10 @@ 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; } --=20 2.25.1