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,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 E9ADCC4320A for ; Thu, 5 Aug 2021 23:31:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C50EE610CD for ; Thu, 5 Aug 2021 23:31:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242418AbhHEXbe (ORCPT ); Thu, 5 Aug 2021 19:31:34 -0400 Received: from mga02.intel.com ([134.134.136.20]:6544 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242380AbhHEXbY (ORCPT ); Thu, 5 Aug 2021 19:31:24 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10067"; a="201448375" X-IronPort-AV: E=Sophos;i="5.84,296,1620716400"; d="scan'208";a="201448375" 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 16:31:09 -0700 X-IronPort-AV: E=Sophos;i="5.84,296,1620716400"; d="scan'208";a="481043903" 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 16:31:08 -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 3/5] x86/tdx: Expose TDX Guest #VE count in /proc/interrupts Date: Thu, 5 Aug 2021 16:30:34 -0700 Message-Id: <20210805233036.2949674-4-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 Add support to expose TD Guest Virtualization Exception (#VE) count in /proc/interrupts. It is useful in performance analysis of TD Guest. Reviewed-by: Tony Luck Reviewed-by: Andi Kleen Signed-off-by: Kuppuswamy Sathyanarayanan --- Changes since v2: * None arch/x86/include/asm/hardirq.h | 3 +++ arch/x86/kernel/irq.c | 6 ++++++ arch/x86/kernel/traps.c | 2 ++ 3 files changed, 11 insertions(+) diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h index 275e7fd20310..07d79fa9c5c6 100644 --- a/arch/x86/include/asm/hardirq.h +++ b/arch/x86/include/asm/hardirq.h @@ -44,6 +44,9 @@ typedef struct { unsigned int irq_hv_reenlightenment_count; unsigned int hyperv_stimer0_count; #endif +#if IS_ENABLED(CONFIG_INTEL_TDX_GUEST) + unsigned int tdg_ve_count; +#endif } ____cacheline_aligned irq_cpustat_t; DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat); diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index e28f6a5d14f1..669869bd46ec 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -181,6 +181,12 @@ int arch_show_interrupts(struct seq_file *p, int prec) seq_printf(p, "%10u ", irq_stats(j)->kvm_posted_intr_wakeup_ipis); seq_puts(p, " Posted-interrupt wakeup event\n"); +#endif +#if IS_ENABLED(CONFIG_INTEL_TDX_GUEST) + seq_printf(p, "%*s: ", prec, "TGV"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", irq_stats(j)->tdg_ve_count); + seq_puts(p, " TDX Guest VE event\n"); #endif return 0; } diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index be56f0281cb5..3673186876ec 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -1187,6 +1187,8 @@ DEFINE_IDTENTRY(exc_virtualization_exception) RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU"); + inc_irq_stat(tdg_ve_count); + /* * NMIs/Machine-checks/Interrupts will be in a disabled state * till TDGETVEINFO TDCALL is executed. This prevents #VE -- 2.25.1