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 F2633C19F2A for ; Sun, 7 Aug 2022 22:09:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239628AbiHGWJi (ORCPT ); Sun, 7 Aug 2022 18:09:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241927AbiHGWHh (ORCPT ); Sun, 7 Aug 2022 18:07:37 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0AE91BCAA; Sun, 7 Aug 2022 15:03:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1659909806; x=1691445806; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=KjjdkEbtaTHZidy0zddkmh0o0n7UOg1kw17gRohVf1w=; b=R3jhY7S/hGBhNuEW/EhHC1mHxi+RsEmOWbUdJPulUsEO7daPAP099DwG ucc1jyodCHJ/Ik+UOdDwLAlyVev2nVzyC4+L3lZEN5XV9aVALFx7qA2+6 YpwT7meUTeucTjJqHbwUjzvE/ztjmx+Qwy9U2nfEgysov3S8HNCBHFLSj lfN+euFiYZRa5cdkFVdcWl+8i/ohLHmvEQAvUcGZSXBWd+WOLb7GRlqMJ E5Gq2o77d7lhxQCTPwBs53ZTJkN8GuzjW0Pg26yvQM7wEplR6jdrbar2K 2k8WMRlUevdm2EbLsAM4THk1KQ9FE2NxaqQ91IlOnAxfaLy6yJkgX4loY A==; X-IronPort-AV: E=McAfee;i="6400,9594,10432"; a="270240412" X-IronPort-AV: E=Sophos;i="5.93,220,1654585200"; d="scan'208";a="270240412" 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="663682758" 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 095/103] KVM: TDX: Handle TDX PV rdmsr/wrmsr hypercall Date: Sun, 7 Aug 2022 15:02:20 -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 | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 341c29385544..fdd0609bd01b 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1157,6 +1157,41 @@ 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_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 = tdvmcall_a0_read(vcpu); + u64 data = tdvmcall_a1_read(vcpu); + + if (!kvm_msr_allowed(vcpu, index, KVM_MSR_FILTER_READ) || + 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)) @@ -1171,6 +1206,10 @@ 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