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b=C9v318gSoOtXcidES+LfCKlfKm84+3o0UhddmQxYvaI21cah2Qz3O/1VcZyou0mONjXz4Fa/O2ehREwLw5KFlI8wiKv3xfPyg/iR+Vp8fyKw3aXPyIDV1XANO/VCtQGzQM/hnwW4ZdONbEO8OOb6q25PZuPNRnBzQQF5yI0zlJw= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from IA0PPF9A76BB3A6.namprd12.prod.outlook.com (2603:10b6:20f:fc04::bdc) by MW6PR12MB9020.namprd12.prod.outlook.com (2603:10b6:303:240::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9052.15; Fri, 22 Aug 2025 22:07:37 +0000 Received: from IA0PPF9A76BB3A6.namprd12.prod.outlook.com ([fe80::bed0:97a3:545d:af16]) by IA0PPF9A76BB3A6.namprd12.prod.outlook.com ([fe80::bed0:97a3:545d:af16%7]) with mapi id 15.20.9031.024; Fri, 22 Aug 2025 22:07:37 +0000 Message-ID: <36712dbc-6a4c-4637-b896-9fbd210d37bb@amd.com> Date: Fri, 22 Aug 2025 17:07:28 -0500 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 02/10] x86/resctrl: Add SDCIAE feature in the command line options To: Reinette Chatre , corbet@lwn.net, tony.luck@intel.com, Dave.Martin@arm.com, james.morse@arm.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com Cc: x86@kernel.org, hpa@zytor.com, akpm@linux-foundation.org, paulmck@kernel.org, rostedt@goodmis.org, Neeraj.Upadhyay@amd.com, david@redhat.com, arnd@arndb.de, fvdl@google.com, seanjc@google.com, thomas.lendacky@amd.com, pawan.kumar.gupta@linux.intel.com, yosry.ahmed@linux.dev, sohil.mehta@intel.com, xin@zytor.com, kai.huang@intel.com, xiaoyao.li@intel.com, peterz@infradead.org, me@mixaill.net, mario.limonciello@amd.com, xin3.li@intel.com, ebiggers@google.com, ak@linux.intel.com, chang.seok.bae@intel.com, andrew.cooper3@citrix.com, perry.yuan@amd.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, manali.shukla@amd.com, gautham.shenoy@amd.com References: <195d8806-9a00-49d8-8891-f59bca97582e@intel.com> Content-Language: en-US From: "Moger, Babu" In-Reply-To: <195d8806-9a00-49d8-8891-f59bca97582e@intel.com> Content-Type: text/plain; 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It took a while to get to it. On 8/7/2025 8:44 PM, Reinette Chatre wrote: > Hi Babu, > > On 8/5/25 4:30 PM, Babu Moger wrote: >> Add the command line options to enable or disable the new resctrl feature > options -> option? sure. > >> L3 Smart Data Cache Injection Allocation Enforcement (SDCIAE). >> >> Signed-off-by: Babu Moger >> --- >> --- >> .../admin-guide/kernel-parameters.txt | 2 +- >> Documentation/filesystems/resctrl.rst | 21 ++++++++++--------- >> arch/x86/kernel/cpu/resctrl/core.c | 2 ++ >> 3 files changed, 14 insertions(+), 11 deletions(-) >> >> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt >> index 0d2ea9a60145..0170c0af03cc 100644 >> --- a/Documentation/admin-guide/kernel-parameters.txt >> +++ b/Documentation/admin-guide/kernel-parameters.txt >> @@ -6089,7 +6089,7 @@ >> rdt= [HW,X86,RDT] >> Turn on/off individual RDT features. List is: >> cmt, mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, l2cdp, >> - mba, smba, bmec. >> + mba, smba, bmec, sdciae. >> E.g. to turn on cmt and turn off mba use: >> rdt=cmt,!mba >> >> diff --git a/Documentation/filesystems/resctrl.rst b/Documentation/filesystems/resctrl.rst >> index c7949dd44f2f..f08699030312 100644 >> --- a/Documentation/filesystems/resctrl.rst >> +++ b/Documentation/filesystems/resctrl.rst >> @@ -17,16 +17,17 @@ AMD refers to this feature as AMD Platform Quality of Service(AMD QoS). >> This feature is enabled by the CONFIG_X86_CPU_RESCTRL and the x86 /proc/cpuinfo >> flag bits: >> >> -=============================================== ================================ >> -RDT (Resource Director Technology) Allocation "rdt_a" >> -CAT (Cache Allocation Technology) "cat_l3", "cat_l2" >> -CDP (Code and Data Prioritization) "cdp_l3", "cdp_l2" >> -CQM (Cache QoS Monitoring) "cqm_llc", "cqm_occup_llc" >> -MBM (Memory Bandwidth Monitoring) "cqm_mbm_total", "cqm_mbm_local" >> -MBA (Memory Bandwidth Allocation) "mba" >> -SMBA (Slow Memory Bandwidth Allocation) "" >> -BMEC (Bandwidth Monitoring Event Configuration) "" >> -=============================================== ================================ >> +=============================================================== ================================ >> +RDT (Resource Director Technology) Allocation "rdt_a" >> +CAT (Cache Allocation Technology) "cat_l3", "cat_l2" >> +CDP (Code and Data Prioritization) "cdp_l3", "cdp_l2" >> +CQM (Cache QoS Monitoring) "cqm_llc", "cqm_occup_llc" >> +MBM (Memory Bandwidth Monitoring) "cqm_mbm_total", "cqm_mbm_local" >> +MBA (Memory Bandwidth Allocation) "mba" >> +SMBA (Slow Memory Bandwidth Allocation) "" > With all these adjustments this looks like an ideal time to fix the missing TABs in the SMBA spacing? Sure. Noticed both SMBA and BMEC had tabs missing. Taken care now. thanks Babu > >> +BMEC (Bandwidth Monitoring Event Configuration) "" >> +SDCIAE (Smart Data Cache Injection Allocation Enforcement) "" >> +=============================================================== ================================ > Reinette >