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From: James Morse <james.morse@arm.com>
To: "tan.shaopeng@fujitsu.com" <tan.shaopeng@fujitsu.com>,
	"'x86@kernel.org'" <x86@kernel.org>,
	"'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
Cc: 'Fenghua Yu' <fenghua.yu@intel.com>,
	'Reinette Chatre' <reinette.chatre@intel.com>,
	'Thomas Gleixner' <tglx@linutronix.de>,
	'Ingo Molnar' <mingo@redhat.com>,
	'Borislav Petkov' <bp@alien8.de>, 'H Peter Anvin' <hpa@zytor.com>,
	'Babu Moger' <Babu.Moger@amd.com>,
	"'shameerali.kolothum.thodi@huawei.com'" 
	<shameerali.kolothum.thodi@huawei.com>,
	'Jamie Iles' <jamie@nuviainc.com>,
	'D Scott Phillips OS' <scott@os.amperecomputing.com>,
	"'lcherian@marvell.com'" <lcherian@marvell.com>,
	"'bobo.shaobowang@huawei.com'" <bobo.shaobowang@huawei.com>
Subject: Re: [PATCH v1 09/20] x86/resctrl: Abstract and use supports_mba_mbps()
Date: Fri, 1 Oct 2021 17:01:32 +0100	[thread overview]
Message-ID: <21e71153-a134-b553-785d-2264fa3f0327@arm.com> (raw)
In-Reply-To: <TYAPR01MB63305E4A3128B7CDF84F86538BA49@TYAPR01MB6330.jpnprd01.prod.outlook.com>

Hi  Shaopeng Tan,

On 24/09/2021 07:23, tan.shaopeng@fujitsu.com wrote:
>> To determine whether the mba_mbps option to resctrl should be supported,
>> resctrl tests the boot cpus' x86_vendor.
>>
>> This isn't portable, and needs abstracting behind a helper so this check can be
>> part of the filesystem code that moves to /fs/.
>>
>> Re-use the tests set_mba_sc() does to determine if the mba_sc is supported
>> on this system. An 'alloc_capable' test is added so that this property isn't
>> implied by 'linear'.

>> diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> index e321ea5de562..4388685548a0 100644
>> --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> @@ -2317,7 +2326,7 @@ static int rdt_parse_param(struct fs_context *fc,
>> struct fs_parameter *param)
>>  		ctx->enable_cdpl2 = true;
>>  		return 0;
>>  	case Opt_mba_mbps:
>> -		if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
>> +		if (supports_mba_mbps())
>>  			return -EINVAL;
> I think if(!supports_mba_mbps()) is correct, isn't it? 

Ooops!

(looks like I messed this up when fixing the name)


Thanks,

James

  reply	other threads:[~2021-10-01 16:01 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 22:35 [PATCH v1 00/20] x86/resctrl: Make resctrl_arch_rmid_read() return values in bytes James Morse
2021-07-29 22:35 ` [PATCH v1 01/20] x86/resctrl: Kill off alloc_enabled James Morse
2021-08-11 12:12   ` Jamie Iles
2021-09-01 21:18   ` Reinette Chatre
2021-07-29 22:35 ` [PATCH v1 02/20] x86/resctrl: Merge mon_capable and mon_enabled James Morse
2021-08-11 12:15   ` Jamie Iles
2021-08-11 15:16     ` James Morse
2021-07-29 22:35 ` [PATCH v1 03/20] x86/resctrl: Add domain online callback for resctrl work James Morse
2021-09-01 21:19   ` Reinette Chatre
2021-09-17 16:57     ` James Morse
2021-07-29 22:35 ` [PATCH v1 04/20] x86/resctrl: Add domain offline " James Morse
2021-08-11 16:10   ` Jamie Iles
2021-09-01 21:21   ` Reinette Chatre
2021-07-29 22:35 ` [PATCH v1 05/20] x86/resctrl: Create mba_sc configuration in the rdt_domain James Morse
2021-08-11 16:32   ` Jamie Iles
2021-08-31 16:24     ` James Morse
2021-09-01 21:22   ` Reinette Chatre
2021-09-17 16:57     ` James Morse
2021-07-29 22:35 ` [PATCH v1 06/20] x86/resctrl: Switch over to the resctrl mbps_val list James Morse
2021-09-01 21:25   ` Reinette Chatre
2021-09-17 16:57     ` James Morse
2021-09-17 18:20       ` Reinette Chatre
2021-10-01 16:02         ` James Morse
2021-07-29 22:35 ` [PATCH v1 07/20] x86/resctrl: Remove architecture copy of mbps_val James Morse
2021-09-01 21:26   ` Reinette Chatre
2021-09-17 16:57     ` James Morse
2021-07-29 22:35 ` [PATCH v1 08/20] x86/resctrl: Remove set_mba_sc()s control array re-initialisation James Morse
2021-07-29 22:35 ` [PATCH v1 09/20] x86/resctrl: Abstract and use supports_mba_mbps() James Morse
2021-09-01 21:27   ` Reinette Chatre
2021-09-17 16:57     ` James Morse
2021-09-24  6:23   ` tan.shaopeng
2021-10-01 16:01     ` James Morse [this message]
2021-07-29 22:36 ` [PATCH v1 10/20] x86/resctrl: Allow update_mba_bw() to update controls directly James Morse
2021-09-01 21:28   ` Reinette Chatre
2021-07-29 22:36 ` [PATCH v1 11/20] x86/resctrl: Calculate bandwidth from the total bytes counter James Morse
2021-09-01 21:31   ` Reinette Chatre
2021-09-17 16:58     ` James Morse
2021-07-29 22:36 ` [PATCH v1 12/20] x86/recstrl: Add per-rmid arch private storage for overflow and chunks James Morse
2021-08-11 17:14   ` Jamie Iles
2021-08-31 16:25     ` James Morse
2021-07-29 22:36 ` [PATCH v1 13/20] x86/recstrl: Allow per-rmid arch private storage to be reset James Morse
2021-09-24  6:34   ` tan.shaopeng
2021-10-01 16:01     ` James Morse
2021-07-29 22:36 ` [PATCH v1 14/20] x86/resctrl: Abstract __rmid_read() James Morse
2021-07-29 22:36 ` [PATCH v1 15/20] x86/resctrl: Pass the required parameters into resctrl_arch_rmid_read() James Morse
2021-07-29 22:36 ` [PATCH v1 16/20] x86/resctrl: Move mbm_overflow_count() " James Morse
2021-07-29 22:36 ` [PATCH v1 17/20] x86/resctrl: Move get_corrected_mbm_count() " James Morse
2021-07-29 22:36 ` [PATCH v1 18/20] x86/resctrl: Rename and change the units of resctrl_cqm_threshold James Morse
2021-07-29 22:36 ` [PATCH v1 19/20] x86/resctrl: Add resctrl_rmid_realloc_limit to abstract x86's boot_cpu_data James Morse
2021-07-29 22:36 ` [PATCH v1 20/20] x86/resctrl: Make resctrl_arch_rmid_read() return values in bytes James Morse

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