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=-16.8 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=unavailable 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 E6F21C432BE for ; Thu, 5 Aug 2021 23:31:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE52360F14 for ; Thu, 5 Aug 2021 23:31:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242403AbhHEXb0 (ORCPT ); Thu, 5 Aug 2021 19:31:26 -0400 Received: from mga02.intel.com ([134.134.136.20]:6542 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236895AbhHEXbW (ORCPT ); Thu, 5 Aug 2021 19:31:22 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10067"; a="201448367" X-IronPort-AV: E=Sophos;i="5.84,296,1620716400"; d="scan'208";a="201448367" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Aug 2021 16:31:07 -0700 X-IronPort-AV: E=Sophos;i="5.84,296,1620716400"; d="scan'208";a="481043888" Received: from rmgular-mobl2.amr.corp.intel.com (HELO skuppusw-desk1.amr.corp.intel.com) ([10.251.138.25]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Aug 2021 16:31:07 -0700 From: Kuppuswamy Sathyanarayanan To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Jonathan Corbet , Peter Zijlstra , Andy Lutomirski Cc: "H . Peter Anvin" , Kuppuswamy Sathyanarayanan , Andi Kleen , Tony Luck , Andy Shevchenko , "Kirill A . Shutemov" , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Kuppuswamy Sathyanarayanan Subject: [PATCH v3 1/5] x86/tdx: Add #VE tracepoint Date: Thu, 5 Aug 2021 16:30:32 -0700 Message-Id: <20210805233036.2949674-2-sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210805233036.2949674-1-sathyanarayanan.kuppuswamy@linux.intel.com> References: <20210805233036.2949674-1-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 --- Changes since v2: * Modified tdg_virtualization_exception() to dump cx,ax,dx register contents. arch/x86/include/asm/trace/tdx.h | 59 ++++++++++++++++++++++++++++++++ arch/x86/kernel/tdx.c | 7 ++++ 2 files changed, 66 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..46bae44e12e5 --- /dev/null +++ b/arch/x86/include/asm/trace/tdx.h @@ -0,0 +1,59 @@ +/* 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, + u64 cx, u64 ax, u64 dx), + TP_ARGS(rip, exit_reason, exit_qual, gpa, instr_len, + instr_info, cx, ax, dx), + 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) + __field(u64, cx) + __field(u64, ax) + __field(u64, dx) + ), + 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; + __entry->cx = cx; + __entry->ax = ax; + __entry->dx = dx; + ), + TP_printk("reason %s rip 0x%016llx len %u info 0x%08x qual 0x%016llx gpa 0x%016llx cx %llx ax %llx dx %llx", + __print_symbolic(__entry->exit_reason, VMX_EXIT_REASONS), + __entry->rip, __entry->instr_len, __entry->instr_info, + __entry->exit_qual, __entry->gpa, + __entry->cx, __entry->ax, __entry->dx + ) + ); + +#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 1cf2443edb90..4b41baa56958 100644 --- a/arch/x86/kernel/tdx.c +++ b/arch/x86/kernel/tdx.c @@ -15,6 +15,9 @@ #include /* force_sig_fault() */ #include +#define CREATE_TRACE_POINTS +#include + /* TDX Module call Leaf IDs */ #define TDINFO 1 #define TDGETVEINFO 3 @@ -407,6 +410,10 @@ 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, + regs->cx, regs->ax, regs->dx); + switch (ve->exit_reason) { case EXIT_REASON_HLT: tdg_halt(); -- 2.25.1