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 X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UPPERCASE_50_75,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54E65C07E98 for ; Fri, 2 Jul 2021 22:07:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F7F3613EE for ; Fri, 2 Jul 2021 22:07:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234335AbhGBWJr (ORCPT ); Fri, 2 Jul 2021 18:09:47 -0400 Received: from mga02.intel.com ([134.134.136.20]:51168 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232997AbhGBWHy (ORCPT ); Fri, 2 Jul 2021 18:07:54 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10033"; a="195951888" X-IronPort-AV: E=Sophos;i="5.83,320,1616482800"; d="scan'208";a="195951888" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jul 2021 15:05:20 -0700 X-IronPort-AV: E=Sophos;i="5.83,320,1616482800"; d="scan'208";a="642814693" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jul 2021 15:05:20 -0700 From: isaku.yamahata@intel.com To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Paolo Bonzini , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , erdemaktas@google.com, Connor Kuehl , Sean Christopherson , x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com Subject: [RFC PATCH v2 08/69] KVM: TDX: add trace point before/after TDX SEAMCALLs Date: Fri, 2 Jul 2021 15:04:14 -0700 Message-Id: <28a0ae6b767260fcb410c6ddff7de84f4e13062c.1625186503.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: kvm@vger.kernel.org From: Isaku Yamahata Signed-off-by: Isaku Yamahata --- arch/x86/kvm/trace.h | 80 ++++++++++++++++++++++++++++++ arch/x86/kvm/vmx/seamcall.h | 22 ++++++++- arch/x86/kvm/vmx/tdx_arch.h | 47 ++++++++++++++++++ arch/x86/kvm/vmx/tdx_errno.h | 96 ++++++++++++++++++++++++++++++++++++ arch/x86/kvm/x86.c | 2 + 5 files changed, 246 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index 4f839148948b..c3398d0de9a7 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -8,6 +8,9 @@ #include #include +#include "vmx/tdx_arch.h" +#include "vmx/tdx_errno.h" + #undef TRACE_SYSTEM #define TRACE_SYSTEM kvm @@ -659,6 +662,83 @@ TRACE_EVENT(kvm_nested_vmexit_inject, __entry->exit_int_info, __entry->exit_int_info_err) ); +/* + * Tracepoint for the start of TDX SEAMCALLs. + */ +TRACE_EVENT(kvm_tdx_seamcall_enter, + TP_PROTO(int cpuid, __u64 op, __u64 rcx, __u64 rdx, __u64 r8, + __u64 r9, __u64 r10), + TP_ARGS(cpuid, op, rcx, rdx, r8, r9, r10), + + TP_STRUCT__entry( + __field( int, cpuid ) + __field( __u64, op ) + __field( __u64, rcx ) + __field( __u64, rdx ) + __field( __u64, r8 ) + __field( __u64, r9 ) + __field( __u64, r10 ) + ), + + TP_fast_assign( + __entry->cpuid = cpuid; + __entry->op = op; + __entry->rcx = rcx; + __entry->rdx = rdx; + __entry->r8 = r8; + __entry->r9 = r9; + __entry->r10 = r10; + ), + + TP_printk("cpu: %d op: %s rcx: 0x%llx rdx: 0x%llx r8: 0x%llx r9: 0x%llx r10: 0x%llx", + __entry->cpuid, + __print_symbolic(__entry->op, TDX_SEAMCALL_OP_CODES), + __entry->rcx, __entry->rdx, __entry->r8, + __entry->r9, __entry->r10) +); + +/* + * Tracepoint for the end of TDX SEAMCALLs. + */ +TRACE_EVENT(kvm_tdx_seamcall_exit, + TP_PROTO(int cpuid, __u64 op, __u64 err, __u64 rcx, __u64 rdx, __u64 r8, + __u64 r9, __u64 r10, __u64 r11), + TP_ARGS(cpuid, op, err, rcx, rdx, r8, r9, r10, r11), + + TP_STRUCT__entry( + __field( int, cpuid ) + __field( __u64, op ) + __field( __u64, err ) + __field( __u64, rcx ) + __field( __u64, rdx ) + __field( __u64, r8 ) + __field( __u64, r9 ) + __field( __u64, r10 ) + __field( __u64, r11 ) + ), + + TP_fast_assign( + __entry->cpuid = cpuid; + __entry->op = op; + __entry->err = err; + __entry->rcx = rcx; + __entry->rdx = rdx; + __entry->r8 = r8; + __entry->r9 = r9; + __entry->r10 = r10; + __entry->r11 = r11; + ), + + TP_printk("cpu: %d op: %s err %s 0x%llx rcx: 0x%llx rdx: 0x%llx r8: 0x%llx r9: 0x%llx r10: 0x%llx r11: 0x%llx", + __entry->cpuid, + __print_symbolic(__entry->op, TDX_SEAMCALL_OP_CODES), + __print_symbolic(__entry->err & TDX_SEAMCALL_STATUS_MASK, + TDX_SEAMCALL_STATUS_CODES), + __entry->err, + __entry->rcx, __entry->rdx, __entry->r8, + __entry->r9, __entry->r10, __entry->r11) +); + /* * Tracepoint for nested #vmexit because of interrupt pending */ diff --git a/arch/x86/kvm/vmx/seamcall.h b/arch/x86/kvm/vmx/seamcall.h index a318940f62ed..2c83ab46eeac 100644 --- a/arch/x86/kvm/vmx/seamcall.h +++ b/arch/x86/kvm/vmx/seamcall.h @@ -9,12 +9,32 @@ #else #ifndef seamcall +#include "trace.h" + struct tdx_ex_ret; asmlinkage u64 __seamcall(u64 op, u64 rcx, u64 rdx, u64 r8, u64 r9, u64 r10, struct tdx_ex_ret *ex); +static inline u64 _seamcall(u64 op, u64 rcx, u64 rdx, u64 r8, u64 r9, u64 r10, + struct tdx_ex_ret *ex) +{ + u64 err; + + trace_kvm_tdx_seamcall_enter(smp_processor_id(), op, + rcx, rdx, r8, r9, r10); + err = __seamcall(op, rcx, rdx, r8, r9, r10, ex); + if (ex) + trace_kvm_tdx_seamcall_exit(smp_processor_id(), op, err, ex->rcx, + ex->rdx, ex->r8, ex->r9, ex->r10, + ex->r11); + else + trace_kvm_tdx_seamcall_exit(smp_processor_id(), op, err, + 0, 0, 0, 0, 0, 0); + return err; +} + #define seamcall(op, rcx, rdx, r8, r9, r10, ex) \ - __seamcall(SEAMCALL_##op, (rcx), (rdx), (r8), (r9), (r10), (ex)) + _seamcall(SEAMCALL_##op, (rcx), (rdx), (r8), (r9), (r10), (ex)) #endif static inline void __pr_seamcall_error(u64 op, const char *op_str, diff --git a/arch/x86/kvm/vmx/tdx_arch.h b/arch/x86/kvm/vmx/tdx_arch.h index 57e9ea4a7fad..559a63290c4d 100644 --- a/arch/x86/kvm/vmx/tdx_arch.h +++ b/arch/x86/kvm/vmx/tdx_arch.h @@ -51,6 +51,53 @@ #define SEAMCALL_TDH_SYS_LP_SHUTDOWN 44 #define SEAMCALL_TDH_SYS_CONFIG 45 +#define TDX_BUILD_OP_CODE(name) { SEAMCALL_ ## name, #name } + +#define TDX_SEAMCALL_OP_CODES \ + TDX_BUILD_OP_CODE(TDH_VP_ENTER), \ + TDX_BUILD_OP_CODE(TDH_MNG_ADDCX), \ + TDX_BUILD_OP_CODE(TDH_MEM_PAGE_ADD), \ + TDX_BUILD_OP_CODE(TDH_MEM_SEPT_ADD), \ + TDX_BUILD_OP_CODE(TDH_VP_ADDCX), \ + TDX_BUILD_OP_CODE(TDH_MEM_PAGE_AUG), \ + TDX_BUILD_OP_CODE(TDH_MEM_RANGE_BLOCK), \ + TDX_BUILD_OP_CODE(TDH_MNG_KEY_CONFIG), \ + TDX_BUILD_OP_CODE(TDH_MNG_CREATE), \ + TDX_BUILD_OP_CODE(TDH_VP_CREATE), \ + TDX_BUILD_OP_CODE(TDH_MNG_RD), \ + TDX_BUILD_OP_CODE(TDH_PHYMEM_PAGE_RD), \ + TDX_BUILD_OP_CODE(TDH_MNG_WR), \ + TDX_BUILD_OP_CODE(TDH_PHYMEM_PAGE_WR), \ + TDX_BUILD_OP_CODE(TDH_MEM_PAGE_DEMOTE), \ + TDX_BUILD_OP_CODE(TDH_MR_EXTEND), \ + TDX_BUILD_OP_CODE(TDH_MR_FINALIZE), \ + TDX_BUILD_OP_CODE(TDH_VP_FLUSH), \ + TDX_BUILD_OP_CODE(TDH_MNG_VPFLUSHDONE), \ + TDX_BUILD_OP_CODE(TDH_MNG_KEY_FREEID), \ + TDX_BUILD_OP_CODE(TDH_MNG_INIT), \ + TDX_BUILD_OP_CODE(TDH_VP_INIT), \ + TDX_BUILD_OP_CODE(TDH_MEM_PAGE_PROMOTE), \ + TDX_BUILD_OP_CODE(TDH_PHYMEM_PAGE_RDMD), \ + TDX_BUILD_OP_CODE(TDH_MEM_SEPT_RD), \ + TDX_BUILD_OP_CODE(TDH_VP_RD), \ + TDX_BUILD_OP_CODE(TDH_MNG_KEY_RECLAIMID), \ + TDX_BUILD_OP_CODE(TDH_PHYMEM_PAGE_RECLAIM), \ + TDX_BUILD_OP_CODE(TDH_MEM_PAGE_REMOVE), \ + TDX_BUILD_OP_CODE(TDH_MEM_SEPT_REMOVE), \ + TDX_BUILD_OP_CODE(TDH_SYS_KEY_CONFIG), \ + TDX_BUILD_OP_CODE(TDH_SYS_INFO), \ + TDX_BUILD_OP_CODE(TDH_SYS_INIT), \ + TDX_BUILD_OP_CODE(TDH_SYS_LP_INIT), \ + TDX_BUILD_OP_CODE(TDH_SYS_TDMR_INIT), \ + TDX_BUILD_OP_CODE(TDH_MEM_TRACK), \ + TDX_BUILD_OP_CODE(TDH_MEM_RANGE_UNBLOCK), \ + TDX_BUILD_OP_CODE(TDH_PHYMEM_CACHE_WB), \ + TDX_BUILD_OP_CODE(TDH_PHYMEM_PAGE_WBINVD), \ + TDX_BUILD_OP_CODE(TDH_MEM_SEPT_WR), \ + TDX_BUILD_OP_CODE(TDH_VP_WR), \ + TDX_BUILD_OP_CODE(TDH_SYS_LP_SHUTDOWN), \ + TDX_BUILD_OP_CODE(TDH_SYS_CONFIG) + #define TDG_VP_VMCALL_GET_TD_VM_CALL_INFO 0x10000 #define TDG_VP_VMCALL_MAP_GPA 0x10001 #define TDG_VP_VMCALL_GET_QUOTE 0x10002 diff --git a/arch/x86/kvm/vmx/tdx_errno.h b/arch/x86/kvm/vmx/tdx_errno.h index 675acea412c9..90ee2b5364d6 100644 --- a/arch/x86/kvm/vmx/tdx_errno.h +++ b/arch/x86/kvm/vmx/tdx_errno.h @@ -2,6 +2,8 @@ #ifndef __KVM_X86_TDX_ERRNO_H #define __KVM_X86_TDX_ERRNO_H +#define TDX_SEAMCALL_STATUS_MASK 0xFFFFFFFF00000000 + /* * TDX SEAMCALL Status Codes (returned in RAX) */ @@ -96,6 +98,100 @@ #define TDX_PAGE_ALREADY_ACCEPTED 0x00000B0A00000000 #define TDX_PAGE_SIZE_MISMATCH 0xC0000B0B00000000 +#define TDX_BUILD_STATUS_CODE(name) { name, #name } + +#define TDX_SEAMCALL_STATUS_CODES \ + TDX_BUILD_STATUS_CODE(TDX_SUCCESS), \ + TDX_BUILD_STATUS_CODE(TDX_NON_RECOVERABLE_VCPU), \ + TDX_BUILD_STATUS_CODE(TDX_NON_RECOVERABLE_TD), \ + TDX_BUILD_STATUS_CODE(TDX_INTERRUPTED_RESUMABLE), \ + TDX_BUILD_STATUS_CODE(TDX_INTERRUPTED_RESTARTABLE), \ + TDX_BUILD_STATUS_CODE(TDX_NON_RECOVERABLE_TD_FATAL), \ + TDX_BUILD_STATUS_CODE(TDX_INVALID_RESUMPTION), \ + TDX_BUILD_STATUS_CODE(TDX_NON_RECOVERABLE_TD_NO_APIC), \ + TDX_BUILD_STATUS_CODE(TDX_OPERAND_INVALID), \ + TDX_BUILD_STATUS_CODE(TDX_OPERAND_ADDR_RANGE_ERROR), \ + TDX_BUILD_STATUS_CODE(TDX_OPERAND_BUSY), \ + TDX_BUILD_STATUS_CODE(TDX_PREVIOUS_TLB_EPOCH_BUSY), \ + TDX_BUILD_STATUS_CODE(TDX_SYS_BUSY), \ + TDX_BUILD_STATUS_CODE(TDX_PAGE_METADATA_INCORRECT), \ + TDX_BUILD_STATUS_CODE(TDX_PAGE_ALREADY_FREE), \ + TDX_BUILD_STATUS_CODE(TDX_PAGE_NOT_OWNED_BY_TD), \ + TDX_BUILD_STATUS_CODE(TDX_PAGE_NOT_FREE), \ + TDX_BUILD_STATUS_CODE(TDX_TD_ASSOCIATED_PAGES_EXIST), \ + TDX_BUILD_STATUS_CODE(TDX_SYSINIT_NOT_PENDING), \ + TDX_BUILD_STATUS_CODE(TDX_SYSINIT_NOT_DONE), \ + TDX_BUILD_STATUS_CODE(TDX_SYSINITLP_NOT_DONE), \ + TDX_BUILD_STATUS_CODE(TDX_SYSINITLP_DONE), \ + TDX_BUILD_STATUS_CODE(TDX_SYS_NOT_READY), \ + TDX_BUILD_STATUS_CODE(TDX_SYS_SHUTDOWN), \ + TDX_BUILD_STATUS_CODE(TDX_SYSCONFIG_NOT_DONE), \ + TDX_BUILD_STATUS_CODE(TDX_TD_NOT_INITIALIZED), \ + TDX_BUILD_STATUS_CODE(TDX_TD_INITIALIZED), \ + TDX_BUILD_STATUS_CODE(TDX_TD_NOT_FINALIZED), \ + TDX_BUILD_STATUS_CODE(TDX_TD_FINALIZED), \ + TDX_BUILD_STATUS_CODE(TDX_TD_FATAL), \ + TDX_BUILD_STATUS_CODE(TDX_TD_NON_DEBUG), \ + TDX_BUILD_STATUS_CODE(TDX_TDCX_NUM_INCORRECT), \ + TDX_BUILD_STATUS_CODE(TDX_VCPU_STATE_INCORRECT), \ + TDX_BUILD_STATUS_CODE(TDX_VCPU_ASSOCIATED), \ + TDX_BUILD_STATUS_CODE(TDX_VCPU_NOT_ASSOCIATED), \ + TDX_BUILD_STATUS_CODE(TDX_TDVPX_NUM_INCORRECT), \ + TDX_BUILD_STATUS_CODE(TDX_NO_VALID_VE_INFO), \ + TDX_BUILD_STATUS_CODE(TDX_MAX_VCPUS_EXCEEDED), \ + TDX_BUILD_STATUS_CODE(TDX_TSC_ROLLBACK), \ + TDX_BUILD_STATUS_CODE(TDX_FIELD_NOT_WRITABLE), \ + TDX_BUILD_STATUS_CODE(TDX_FIELD_NOT_READABLE), \ + TDX_BUILD_STATUS_CODE(TDX_TD_VMCS_FIELD_NOT_INITIALIZED), \ + TDX_BUILD_STATUS_CODE(TDX_KEY_GENERATION_FAILED), \ + TDX_BUILD_STATUS_CODE(TDX_TD_KEYS_NOT_CONFIGURED), \ + TDX_BUILD_STATUS_CODE(TDX_KEY_STATE_INCORRECT), \ + TDX_BUILD_STATUS_CODE(TDX_KEY_CONFIGURED), \ + TDX_BUILD_STATUS_CODE(TDX_WBCACHE_NOT_COMPLETE), \ + TDX_BUILD_STATUS_CODE(TDX_HKID_NOT_FREE), \ + TDX_BUILD_STATUS_CODE(TDX_NO_HKID_READY_TO_WBCACHE), \ + TDX_BUILD_STATUS_CODE(TDX_WBCACHE_RESUME_ERROR), \ + TDX_BUILD_STATUS_CODE(TDX_FLUSHVP_NOT_DONE), \ + TDX_BUILD_STATUS_CODE(TDX_NUM_ACTIVATED_HKIDS_NOT_SUPPORTED), \ + TDX_BUILD_STATUS_CODE(TDX_INCORRECT_CPUID_VALUE), \ + TDX_BUILD_STATUS_CODE(TDX_BOOT_NT4_SET), \ + TDX_BUILD_STATUS_CODE(TDX_INCONSISTENT_CPUID_FIELD), \ + TDX_BUILD_STATUS_CODE(TDX_CPUID_LEAF_1F_FORMAT_UNRECOGNIZED), \ + TDX_BUILD_STATUS_CODE(TDX_INVALID_WBINVD_SCOPE), \ + TDX_BUILD_STATUS_CODE(TDX_INVALID_PKG_ID), \ + TDX_BUILD_STATUS_CODE(TDX_CPUID_LEAF_NOT_SUPPORTED), \ + TDX_BUILD_STATUS_CODE(TDX_SMRR_NOT_LOCKED), \ + TDX_BUILD_STATUS_CODE(TDX_INVALID_SMRR_CONFIGURATION), \ + TDX_BUILD_STATUS_CODE(TDX_SMRR_OVERLAPS_CMR), \ + TDX_BUILD_STATUS_CODE(TDX_SMRR_LOCK_NOT_SUPPORTED), \ + TDX_BUILD_STATUS_CODE(TDX_SMRR_NOT_SUPPORTED), \ + TDX_BUILD_STATUS_CODE(TDX_INCONSISTENT_MSR), \ + TDX_BUILD_STATUS_CODE(TDX_INCORRECT_MSR_VALUE), \ + TDX_BUILD_STATUS_CODE(TDX_SEAMREPORT_NOT_AVAILABLE), \ + TDX_BUILD_STATUS_CODE(TDX_PERF_COUNTERS_ARE_PEBS_ENABLED), \ + TDX_BUILD_STATUS_CODE(TDX_INVALID_TDMR), \ + TDX_BUILD_STATUS_CODE(TDX_NON_ORDERED_TDMR), \ + TDX_BUILD_STATUS_CODE(TDX_TDMR_OUTSIDE_CMRS), \ + TDX_BUILD_STATUS_CODE(TDX_TDMR_ALREADY_INITIALIZED), \ + TDX_BUILD_STATUS_CODE(TDX_INVALID_PAMT), \ + TDX_BUILD_STATUS_CODE(TDX_PAMT_OUTSIDE_CMRS), \ + TDX_BUILD_STATUS_CODE(TDX_PAMT_OVERLAP), \ + TDX_BUILD_STATUS_CODE(TDX_INVALID_RESERVED_IN_TDMR), \ + TDX_BUILD_STATUS_CODE(TDX_NON_ORDERED_RESERVED_IN_TDMR), \ + TDX_BUILD_STATUS_CODE(TDX_CMR_LIST_INVALID), \ + TDX_BUILD_STATUS_CODE(TDX_EPT_WALK_FAILED), \ + TDX_BUILD_STATUS_CODE(TDX_EPT_ENTRY_FREE), \ + TDX_BUILD_STATUS_CODE(TDX_EPT_ENTRY_NOT_FREE), \ + TDX_BUILD_STATUS_CODE(TDX_EPT_ENTRY_NOT_PRESENT), \ + TDX_BUILD_STATUS_CODE(TDX_EPT_ENTRY_NOT_LEAF), \ + TDX_BUILD_STATUS_CODE(TDX_EPT_ENTRY_LEAF), \ + TDX_BUILD_STATUS_CODE(TDX_GPA_RANGE_NOT_BLOCKED), \ + TDX_BUILD_STATUS_CODE(TDX_GPA_RANGE_ALREADY_BLOCKED), \ + TDX_BUILD_STATUS_CODE(TDX_TLB_TRACKING_NOT_DONE), \ + TDX_BUILD_STATUS_CODE(TDX_EPT_INVALID_PROMOTE_CONDITIONS), \ + TDX_BUILD_STATUS_CODE(TDX_PAGE_ALREADY_ACCEPTED), \ + TDX_BUILD_STATUS_CODE(TDX_PAGE_SIZE_MISMATCH) + /* * TDG.VP.VMCALL Status Codes (returned in R10) */ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e0f4a46649d7..d11cf87674f3 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11970,6 +11970,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_ga_log); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_update_request); +EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_tdx_seamcall_enter); +EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_tdx_seamcall_exit); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_msr_protocol_enter); -- 2.25.1