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,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 7CB04C636C8 for ; Tue, 20 Jul 2021 04:35:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 630DA6113C for ; Tue, 20 Jul 2021 04:35:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343501AbhGTDyp (ORCPT ); Mon, 19 Jul 2021 23:54:45 -0400 Received: from mga12.intel.com ([192.55.52.136]:61802 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242188AbhGTDxj (ORCPT ); Mon, 19 Jul 2021 23:53:39 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10050"; a="190760793" X-IronPort-AV: E=Sophos;i="5.84,254,1620716400"; d="scan'208";a="190760793" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jul 2021 21:33:51 -0700 X-IronPort-AV: E=Sophos;i="5.84,254,1620716400"; d="scan'208";a="661016013" Received: from ywei11-mobl1.amr.corp.intel.com (HELO skuppusw-desk1.amr.corp.intel.com) ([10.251.138.31]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jul 2021 21:33:42 -0700 From: Kuppuswamy Sathyanarayanan To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Peter Zijlstra , Andy Lutomirski Cc: Peter H Anvin , Dave Hansen , Tony Luck , Dan Williams , Andi Kleen , Kirill Shutemov , Sean Christopherson , Kuppuswamy Sathyanarayanan , x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/4] x86/tdx: Add #VE tracepoint Date: Mon, 19 Jul 2021 21:33:35 -0700 Message-Id: <20210720043338.2123695-2-sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210720043338.2123695-1-sathyanarayanan.kuppuswamy@linux.intel.com> References: <20210720043338.2123695-1-sathyanarayanan.kuppuswamy@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sean Christopherson Add tracepoint for tracing TDX guest #VE exceptions. It will dump RIP, exit reason, exit qual, GPA, instruction length and instruction info for each #VE exception occurred. Also, make trace points RCU idle safe to avoid warnings when RCU debugging is enabled. Reviewed-by: Andi Kleen Reviewed-by: Tony Luck Signed-off-by: Sean Christopherson Signed-off-by: Kuppuswamy Sathyanarayanan --- arch/x86/include/asm/trace/tdx.h | 51 ++++++++++++++++++++++++++++++++ arch/x86/kernel/tdx.c | 6 ++++ 2 files changed, 57 insertions(+) create mode 100644 arch/x86/include/asm/trace/tdx.h diff --git a/arch/x86/include/asm/trace/tdx.h b/arch/x86/include/asm/trace/tdx.h new file mode 100644 index 000000000000..e045e276009e --- /dev/null +++ b/arch/x86/include/asm/trace/tdx.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#if !defined(_TRACE_TDX_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_TDX_H + +#include + +#include + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM tdx + +#ifdef CONFIG_INTEL_TDX_GUEST + +TRACE_EVENT(tdg_virtualization_exception, + TP_PROTO(u64 rip, u32 exit_reason, u64 exit_qual, + u64 gpa, u32 instr_len, u32 instr_info), + TP_ARGS(rip, exit_reason, exit_qual, gpa, instr_len, + instr_info), + TP_STRUCT__entry( + __field(u64, rip) + __field(u64, exit_qual) + __field(u64, gpa) + __field(u32, exit_reason) + __field(u32, instr_len) + __field(u32, instr_info) + ), + TP_fast_assign( + __entry->rip = rip; + __entry->exit_qual = exit_qual; + __entry->gpa = gpa; + __entry->exit_reason = exit_reason; + __entry->instr_len = instr_len; + __entry->instr_info = instr_info; + ), + TP_printk("reason %s rip 0x%016llx len %u info 0x%08x qual 0x%016llx gpa 0x%016llx", + __print_symbolic(__entry->exit_reason, VMX_EXIT_REASONS), + __entry->rip, __entry->instr_len, __entry->instr_info, + __entry->exit_qual, __entry->gpa + ) + ); + +#endif // CONFIG_INTEL_TDX_GUEST + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH asm/trace/ +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE tdx +#endif /* _TRACE_TDX_H */ + +/* This part must be outside protection */ +#include diff --git a/arch/x86/kernel/tdx.c b/arch/x86/kernel/tdx.c index 5ccdfeb01a8d..6d55a1bc7000 100644 --- a/arch/x86/kernel/tdx.c +++ b/arch/x86/kernel/tdx.c @@ -16,6 +16,9 @@ #include /* force_sig_fault() */ #include +#define CREATE_TRACE_POINTS +#include + /* TDX Module call Leaf IDs */ #define TDINFO 1 #define TDGETVEINFO 3 @@ -407,6 +410,9 @@ int tdg_handle_virtualization_exception(struct pt_regs *regs, unsigned long val; int ret = 0; + trace_tdg_virtualization_exception_rcuidle(regs->ip, ve->exit_reason, + ve->exit_qual, ve->gpa, ve->instr_len, ve->instr_info); + switch (ve->exit_reason) { case EXIT_REASON_HLT: tdg_halt(); -- 2.25.1