From patchwork Fri Apr 12 06:57:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi-De Wu X-Patchwork-Id: 13626993 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 49C5EC4345F for ; Fri, 12 Apr 2024 07:01:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=yPp602tXml2+NHuyd6ppBj3wf59vdipRPyxu2RqKtgg=; b=ajLusULtW5iy4e ijZkFqiTlaIJA9vNoubR+RQm6dD8MwqsbFeW/+TJ50cwv22QUPMXIlH3d/6IOuf9mMZ3R1N+i5C7z qDCS/cMotkdQrkBSUo6YDxTjEQaCmNXhm3RnrMydKANcZRE2Djr6XWK+cbeBsrvtVo9TO3RuXtZHS PNl6ME2Tf4xLGc9JrpgaSsnycSqZNFG1h42MyyZMc/iL4AHnTDJPT6S/VN3cHDQBwlwtG4iGSuIKY xZEbsAGpHaJKaX3nEP8uoYIxAoTfPSHrJcWnAaMSB50JADFSAXA9MLCTcKViuAw5UDqiPA7BrOFeP rN7kAjo3QwZdBL0rw4+w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvAu8-0000000Fho3-28zn; Fri, 12 Apr 2024 07:00:56 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvArl-0000000FgE8-0N9P; Fri, 12 Apr 2024 06:58:38 +0000 X-UUID: 0e76e8faf89a11ee96d5dfc950b7243d-20240411 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=RvqAJLclmygd/KaYK6kKF+HTkiMHUHtz8dfFia/SmYY=; b=DxsfAispzeSFbnvRoOTWWVZZquOuNjN+2ZdIj1Fj+PJiY7WBxhsXifpTe3ucS3JV/ZUk3ESOY+ZbzYArEYP0XYa70SUZNqyNpxWZvrnSyltpX1Eg8FfGlpWJAsP3dstMRKzWBPem80wwj+LZyjK3l0j50GQhXy2fURpO2XGyFXQ=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.37,REQID:eb933933-cd55-4d4f-b551-787a37d43f6a,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:6f543d0,CLOUDID:844c9782-4f93-4875-95e7-8c66ea833d57,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1, SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 0e76e8faf89a11ee96d5dfc950b7243d-20240411 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 552907334; Thu, 11 Apr 2024 23:58:24 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 12 Apr 2024 14:57:48 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 12 Apr 2024 14:57:48 +0800 From: Yi-De Wu To: Yingshiuan Pan , Ze-Yu Wang , Yi-De Wu , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Catalin Marinas , Will Deacon , Richard Cochran , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , David Bradil , Trilok Soni , My Chuang , Shawn Hsiao , PeiLun Suei , Liju Chen , Willix Yeh , Kevenny Hsieh Subject: [PATCH v10 20/21] virt: geniezone: Add tracing support for hyp call and vcpu exit_reason Date: Fri, 12 Apr 2024 14:57:17 +0800 Message-ID: <20240412065718.29105-21-yi-de.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240412065718.29105-1-yi-de.wu@mediatek.com> References: <20240412065718.29105-1-yi-de.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240411_235830_092480_13825CC3 X-CRM114-Status: GOOD ( 18.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add tracepoints for hypervisor calls and VCPU exit reasons in GenieZone driver. It aids performance debugging by providing more information about hypervisor operations and VCPU behavior. Command Usage: echo geniezone:* >> /sys/kernel/tracing/set_event echo 1 > /sys/kernel/tracing/tracing_on echo 0 > /sys/kernel/tracing/tracing_on cat /sys/kernel/tracing/trace For example: crosvm_vcpu0-4874 [007] ..... 94.757349: mtk_hypcall_enter: id=0xfb001005 crosvm_vcpu0-4874 [007] ..... 94.760902: mtk_hypcall_leave: id=0xfb001005 invalid=0 crosvm_vcpu0-4874 [007] ..... 94.760902: mtk_vcpu_exit: vcpu exit_reason=IRQ(0x92920003) This example tracks a hypervisor function call by an ID (`0xbb001005`) from initiation to termination, which is supported (invalid=0). A vCPU exit is triggered by an Interrupt Request (IRQ) (exit reason: 0x92920003). /* VM exit reason */ enum { GZVM_EXIT_UNKNOWN = 0x92920000, GZVM_EXIT_MMIO = 0x92920001, GZVM_EXIT_HYPERCALL = 0x92920002, GZVM_EXIT_IRQ = 0x92920003, GZVM_EXIT_EXCEPTION = 0x92920004, GZVM_EXIT_DEBUG = 0x92920005, GZVM_EXIT_FAIL_ENTRY = 0x92920006, GZVM_EXIT_INTERNAL_ERROR = 0x92920007, GZVM_EXIT_SYSTEM_EVENT = 0x92920008, GZVM_EXIT_SHUTDOWN = 0x92920009, GZVM_EXIT_GZ = 0x9292000a, }; Signed-off-by: Liju-clr Chen Signed-off-by: Yi-De Wu --- arch/arm64/geniezone/vm.c | 4 ++ drivers/virt/geniezone/gzvm_vcpu.c | 5 +- include/trace/events/geniezone.h | 84 ++++++++++++++++++++++++++++++ 3 files changed, 91 insertions(+), 2 deletions(-) create mode 100644 include/trace/events/geniezone.h diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c index a477546c5a1a..c00142f2e942 100644 --- a/arch/arm64/geniezone/vm.c +++ b/arch/arm64/geniezone/vm.c @@ -7,6 +7,8 @@ #include #include +#define CREATE_TRACE_POINTS +#include #include #include #include "gzvm_arch_common.h" @@ -44,11 +46,13 @@ int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, .a6 = a6, .a7 = a7, }; + trace_mtk_hypcall_enter(a0); arm_smccc_1_2_hvc(&args, &res_1_2); res->a0 = res_1_2.a0; res->a1 = res_1_2.a1; res->a2 = res_1_2.a2; res->a3 = res_1_2.a3; + trace_mtk_hypcall_leave(a0, (res->a0 != ERR_NOT_SUPPORTED) ? 0 : 1); return gzvm_err_to_errno(res->a0); } diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gzvm_vcpu.c index e135d9388090..28bd690e4b7c 100644 --- a/drivers/virt/geniezone/gzvm_vcpu.c +++ b/drivers/virt/geniezone/gzvm_vcpu.c @@ -10,6 +10,8 @@ #include #include #include + +#include #include /* maximum size needed for holding an integer */ @@ -103,6 +105,7 @@ static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void __user *argp) while (!need_userspace && !signal_pending(current)) { gzvm_arch_vcpu_run(vcpu, &exit_reason); + trace_mtk_vcpu_exit(exit_reason); switch (exit_reason) { case GZVM_EXIT_MMIO: @@ -141,11 +144,9 @@ static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void __user *argp) default: pr_err("vcpu unknown exit\n"); need_userspace = true; - goto out; } } -out: if (copy_to_user(argp, vcpu->run, sizeof(struct gzvm_vcpu_run))) return -EFAULT; if (signal_pending(current)) { diff --git a/include/trace/events/geniezone.h b/include/trace/events/geniezone.h new file mode 100644 index 000000000000..4fffd826ba67 --- /dev/null +++ b/include/trace/events/geniezone.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM geniezone + +#define _TRACE_GENIEZONE_H + +#include +#include + +#define GZVM_EXIT_REASONS \ +EM(UNKNOWN)\ +EM(MMIO)\ +EM(HYPERCALL)\ +EM(IRQ)\ +EM(EXCEPTION)\ +EM(DEBUG)\ +EM(FAIL_ENTRY)\ +EM(INTERNAL_ERROR)\ +EM(SYSTEM_EVENT)\ +EM(SHUTDOWN)\ +EMe(GZ) + +#undef EM +#undef EMe +#define EM(a) TRACE_DEFINE_ENUM(GZVM_EXIT_##a); +#define EMe(a) TRACE_DEFINE_ENUM(GZVM_EXIT_##a); + +GZVM_EXIT_REASONS + +#undef EM +#undef EMe + +#define EM(a) { GZVM_EXIT_##a, #a }, +#define EMe(a) { GZVM_EXIT_##a, #a } + +TRACE_EVENT(mtk_hypcall_enter, + TP_PROTO(unsigned long id), + + TP_ARGS(id), + + TP_STRUCT__entry(__field(unsigned long, id)), + + TP_fast_assign(__entry->id = id;), + + TP_printk("id=0x%lx", __entry->id) +); + +TRACE_EVENT(mtk_hypcall_leave, + TP_PROTO(unsigned long id, unsigned long invalid), + + TP_ARGS(id, invalid), + + TP_STRUCT__entry(__field(unsigned long, id) + __field(unsigned long, invalid) + ), + + TP_fast_assign(__entry->id = id; + __entry->invalid = invalid; + ), + + TP_printk("id=0x%lx invalid=%lu", __entry->id, __entry->invalid) +); + +TRACE_EVENT(mtk_vcpu_exit, + TP_PROTO(unsigned long exit_reason), + + TP_ARGS(exit_reason), + + TP_STRUCT__entry(__field(unsigned long, exit_reason)), + + TP_fast_assign(__entry->exit_reason = exit_reason;), + + TP_printk("vcpu exit_reason=%s(0x%lx)", + __print_symbolic(__entry->exit_reason, GZVM_EXIT_REASONS), + __entry->exit_reason) + +); + +/* This part must be outside protection */ +#include