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Thu, 2 Feb 2023 15:47:25 -0600 Subject: [RFC v2 PATCH 5/7] x86/resctrl: Introduce -o debug mount option From: Babu Moger To: , CC: , , , , , , , , , , , Date: Thu, 2 Feb 2023 15:47:24 -0600 Message-ID: <167537444491.647488.11815488030989406143.stgit@bmoger-ubuntu> In-Reply-To: <167537433143.647488.9641864719195184123.stgit@bmoger-ubuntu> References: <167537433143.647488.9641864719195184123.stgit@bmoger-ubuntu> User-Agent: StGit/1.1.dev103+g5369f4c MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00001A63:EE_|LV2PR12MB6016:EE_ X-MS-Office365-Filtering-Correlation-Id: 4ac4023d-c985-4fa9-1185-08db0567138f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: Snn7oB1VtKuVQU/2DodpY1ynsi9NWhAEuW/jhLxrPDG14dJwVFOLz1CT2Z5ILdaG49vQkaDFr+1x2q/kyfUheE3GNnsdfQjc7RLuQbzSVaXu0zlsh1A+J68gZsPPkI3DS1QWYJjy+sFiPjFLPTLgeGZ0FWgh/9V8OzrJMdddGd+hLmJT3T8QBf+QSo7xesEI6JvncnmLs190KVmuPqc6cHdOPpNOXgGWOPE/tSL5w7J0MAFNQQLGWS3P82IkESQACCFpmWNvSwQK5iX9+O0Z3nWCVKd0TTEBlaAnqtNdsjoQGQpt7CKObhXdEpkSPef6TdMgDxuNgnKVyhvd8c/MRbIHxNjvgfHQ6tjwJtIw9gdIxBTnnZNKtUclQ4FTNYsxd0AvT5OmBQA9FMeSw+5bUju30pf5Np3ATsDtesflnR2gnPlBlisgcs3JgQsvNm8VqCvTNva5C8wuIVOqTaqIiNIMi4JE463BYUvpKnw1B3/uA/s2WHM4uZWWpEuIw8PrsAnQibbQQKYg/pOupu6tDzBml42+Z/Io+2VKidBRBAbfJa3dS2uCFrP2jIdlg8MV7oG+6pKelClE4w77axGiOjFf+kFc9Ajx4u4d1YbAvO0VRIfpKrCuYTIkvJcEmxJrGSUJPs7WBmxK4uYZf8AaLdTSz5tnV5fREPewDtGx0rt/uehbavnmUvSV6We0bvMtKLyU+Pat4FIG/rRacIltWfxLsBMibN5EKJ3M6F0F2vC5hGp+F5TozWCJShLc+6hn7u5ltIChtUTifRAwOClpgw== X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(7916004)(4636009)(39860400002)(396003)(136003)(346002)(376002)(451199018)(46966006)(40470700004)(36840700001)(70586007)(4326008)(41300700001)(70206006)(8676002)(40480700001)(8936002)(16576012)(110136005)(316002)(5660300002)(54906003)(103116003)(44832011)(356005)(7416002)(186003)(81166007)(2906002)(9686003)(36860700001)(478600001)(40460700003)(16526019)(26005)(426003)(86362001)(82310400005)(47076005)(33716001)(82740400003)(336012)(71626013)(36900700001);DIR:OUT;SFP:1101; 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Debug option adds the files for debug purposes. Signed-off-by: Babu Moger --- Documentation/x86/resctrl.rst | 2 ++ arch/x86/kernel/cpu/resctrl/internal.h | 1 + arch/x86/kernel/cpu/resctrl/rdtgroup.c | 7 +++++++ 3 files changed, 10 insertions(+) diff --git a/Documentation/x86/resctrl.rst b/Documentation/x86/resctrl.rst index 58b76fc75cb7..2c013c5d45fd 100644 --- a/Documentation/x86/resctrl.rst +++ b/Documentation/x86/resctrl.rst @@ -46,6 +46,8 @@ mount options are: "mba_MBps": Enable the MBA Software Controller(mba_sc) to specify MBA bandwidth in MBps +"debug": + Lists the debug files in resctrl interface L2 and L3 CDP are controlled separately. diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h index 6767c85b9699..35a9ee343fe0 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -59,6 +59,7 @@ struct rdt_fs_context { bool enable_cdpl2; bool enable_cdpl3; bool enable_mba_mbps; + bool debug; }; static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc) diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index 18d458a3cba6..9b7813aa6baf 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -2555,6 +2555,7 @@ enum rdt_param { Opt_cdp, Opt_cdpl2, Opt_mba_mbps, + Opt_debug, nr__rdt_params }; @@ -2562,6 +2563,7 @@ static const struct fs_parameter_spec rdt_fs_parameters[] = { fsparam_flag("cdp", Opt_cdp), fsparam_flag("cdpl2", Opt_cdpl2), fsparam_flag("mba_MBps", Opt_mba_mbps), + fsparam_flag("debug", Opt_debug), {} }; @@ -2587,6 +2589,9 @@ static int rdt_parse_param(struct fs_context *fc, struct fs_parameter *param) return -EINVAL; ctx->enable_mba_mbps = true; return 0; + case Opt_debug: + ctx->debug = true; + return 0; } return -EINVAL; @@ -3525,6 +3530,8 @@ static int rdtgroup_show_options(struct seq_file *seq, struct kernfs_root *kf) if (is_mba_sc(&rdt_resources_all[RDT_RESOURCE_MBA].r_resctrl)) seq_puts(seq, ",mba_MBps"); + seq_puts(seq, ",debug"); + return 0; }