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From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
To: Borislav Petkov <bp@alien8.de>
Cc: <linux-kernel@vger.kernel.org>,
	<iommu@lists.linux-foundation.org>, <joro@8bytes.org>,
	<peterz@infradead.org>, <mingo@redhat.com>
Subject: Re: [PATCH v7 7/7] perf/amd/iommu: Enable support for multiple IOMMUs
Date: Sat, 14 Jan 2017 09:58:29 +0700	[thread overview]
Message-ID: <46834d61-d8b2-201f-99dd-5727994281a5@amd.com> (raw)
In-Reply-To: <20170113114925.x6f4r5qcidksnfes@pd.tnic>



On 1/13/17 18:49, Borislav Petkov wrote:
> On Fri, Jan 13, 2017 at 05:24:01PM +0700, Suravee Suthikulpanit wrote:
>> IIUC, Perf tools looks at the /sys/devices/xxxxx to identify
>> availalble PMUs. Are you planning to have perf tools look at
>> /sys/devices/system/iommu/xxx instead?
>
> No, I'm planning to understand what do you mean exactly. Because the
> PMUs are, as I'm being pointed to, here:
>
> #define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
>
> Do you mean that, per chance?
>

Ah, okay. I can see the following directory path:

# ls -l  /sys/devices/
drwxr-xr-x  5 root root 0 Jan 13 20:36 amd_iommu_0

# ls -l /sys/bus/event_source/devices/
lrwxrwxrwx 1 root root 0 Jan 13 20:33 amd_iommu_0 -> ../../../devices/amd_iommu_0

I'll update the commit log to mention /bus/event_source/devices/amd_iommu_X instead.

Thanks,
S

WARNING: multiple messages have this Message-ID (diff)
From: Suravee Suthikulpanit <Suravee.Suthikulpanit-5C7GfCeVMHo@public.gmane.org>
To: Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
Cc: peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v7 7/7] perf/amd/iommu: Enable support for multiple IOMMUs
Date: Sat, 14 Jan 2017 09:58:29 +0700	[thread overview]
Message-ID: <46834d61-d8b2-201f-99dd-5727994281a5@amd.com> (raw)
In-Reply-To: <20170113114925.x6f4r5qcidksnfes-fF5Pk5pvG8Y@public.gmane.org>



On 1/13/17 18:49, Borislav Petkov wrote:
> On Fri, Jan 13, 2017 at 05:24:01PM +0700, Suravee Suthikulpanit wrote:
>> IIUC, Perf tools looks at the /sys/devices/xxxxx to identify
>> availalble PMUs. Are you planning to have perf tools look at
>> /sys/devices/system/iommu/xxx instead?
>
> No, I'm planning to understand what do you mean exactly. Because the
> PMUs are, as I'm being pointed to, here:
>
> #define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
>
> Do you mean that, per chance?
>

Ah, okay. I can see the following directory path:

# ls -l  /sys/devices/
drwxr-xr-x  5 root root 0 Jan 13 20:36 amd_iommu_0

# ls -l /sys/bus/event_source/devices/
lrwxrwxrwx 1 root root 0 Jan 13 20:33 amd_iommu_0 -> ../../../devices/amd_iommu_0

I'll update the commit log to mention /bus/event_source/devices/amd_iommu_X instead.

Thanks,
S

  reply	other threads:[~2017-01-14  2:58 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-10  3:33 [PATCH v7 0/7] perf/amd/iommu: Enable multi-IOMMU support Suravee Suthikulpanit
2017-01-10  3:33 ` Suravee Suthikulpanit
2017-01-10  3:33 ` [PATCH v7 1/7] perf/amd/iommu: Misc fix up perf_iommu_read Suravee Suthikulpanit
2017-01-10  3:33   ` Suravee Suthikulpanit
2017-01-11 10:32   ` Borislav Petkov
2017-01-11 10:32     ` Borislav Petkov
2017-01-11 11:57   ` Peter Zijlstra
2017-01-11 11:57     ` Peter Zijlstra
2017-01-15  2:36     ` Suravee Suthikulpanit
2017-01-15  2:36       ` Suravee Suthikulpanit
2017-01-19 10:14       ` Peter Zijlstra
2017-01-19 10:14         ` Peter Zijlstra
2017-01-10  3:33 ` [PATCH v7 2/7] perf/amd/iommu: Modify functions to query max banks and counters Suravee Suthikulpanit
2017-01-10  3:33   ` Suravee Suthikulpanit
2017-01-10 14:43   ` Joerg Roedel
2017-01-10 14:43     ` Joerg Roedel
2017-01-11  3:03     ` Suravee Suthikulpanit
2017-01-11  3:03       ` Suravee Suthikulpanit
2017-01-11  8:13       ` Boris Petkov
2017-01-11  8:13         ` Boris Petkov
2017-01-11  9:14         ` Suravee Suthikulpanit
2017-01-11  9:14           ` Suravee Suthikulpanit
2017-01-10  3:33 ` [PATCH v7 3/7] perf/amd/iommu: Modify IOMMU API to allow specifying IOMMU index Suravee Suthikulpanit
2017-01-10  3:33   ` Suravee Suthikulpanit
2017-01-11 17:23   ` Borislav Petkov
2017-01-10  3:33 ` [PATCH v7 4/7] perf/amd/iommu: Declare pr_fmt and remove unnecessary pr_debug Suravee Suthikulpanit
2017-01-10  3:33   ` Suravee Suthikulpanit
2017-01-12 10:19   ` Borislav Petkov
2017-01-14 10:13     ` Suravee Suthikulpanit
2017-01-14 10:13       ` Suravee Suthikulpanit
2017-01-10  3:33 ` [PATCH v7 5/7] perf/amd/iommu: Clean up perf_iommu_enable_event Suravee Suthikulpanit
2017-01-10  3:33   ` Suravee Suthikulpanit
2017-01-12 14:14   ` Borislav Petkov
2017-01-12 14:14     ` Borislav Petkov
2017-01-10  3:33 ` [PATCH v7 6/7] iommu/amd: Introduce amd_iommu_get_num_iommus() Suravee Suthikulpanit
2017-01-10  3:33   ` Suravee Suthikulpanit
2017-01-12 14:21   ` Borislav Petkov
2017-01-10  3:33 ` [PATCH v7 7/7] perf/amd/iommu: Enable support for multiple IOMMUs Suravee Suthikulpanit
2017-01-10  3:33   ` Suravee Suthikulpanit
2017-01-12 17:52   ` Borislav Petkov
2017-01-12 17:52     ` Borislav Petkov
2017-01-13 10:24     ` Suravee Suthikulpanit
2017-01-13 10:24       ` Suravee Suthikulpanit
2017-01-13 11:49       ` Borislav Petkov
2017-01-14  2:58         ` Suravee Suthikulpanit [this message]
2017-01-14  2:58           ` Suravee Suthikulpanit
2017-01-14 10:29           ` Borislav Petkov
2017-01-14 10:29             ` Borislav Petkov

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