On Tue, Nov 18, 2014 at 05:37:26PM +0100, Stephane Eranian wrote:
> Does it need to bit a bitmask, as opposed to just a bug number (which could
> be implemented as a bitmask)?
>
> >> enable_workaround:
> >>- provide the bit number (of the workaround) to enable the workaround
> >
> > Right, wri
On Tue, Nov 18, 2014 at 4:43 PM, Borislav Petkov wrote:
> On Tue, Nov 18, 2014 at 04:29:59PM +0100, Stephane Eranian wrote:
>> I am trying to get a better understanding of this scheme.
>>
>> status:
>> - a summary of what is enabled/disabled?
>> - With description (as suggested by Boris)?
>>
On Tue, Nov 18, 2014 at 04:29:59PM +0100, Stephane Eranian wrote:
> I am trying to get a better understanding of this scheme.
>
> status:
> - a summary of what is enabled/disabled?
> - With description (as suggested by Boris)?
> - File is readonly
> - is that printing a variable length bit
Hi,
On Tue, Nov 18, 2014 at 1:31 AM, Thomas Gleixner wrote:
>
> On Tue, 18 Nov 2014, Borislav Petkov wrote:
> > On Tue, Nov 18, 2014 at 12:38:14AM +0100, Thomas Gleixner wrote:
> > > Well a bitmask is a pretty indescriptive item as well. Putting my user
> > > hat on: Where is the documentation fo
On Tue, Nov 18, 2014 at 05:01:28PM +0200, Maria Dimakopoulou wrote:
> OK. We can call it perf_pmu_ht_bug_workaround to make this more
> explicit.
I think you should consider adding a more generic scheme from the
get-go, as Thomas suggested instead of a specific file. We need this
hammered out prop
On Tue, Nov 18, 2014 at 1:02 AM, Borislav Petkov wrote:
> On Mon, Nov 17, 2014 at 08:07:05PM +0100, Stephane Eranian wrote:
>> From: Maria Dimakopoulou
>>
>> This patch adds a sysfs entry:
>>
>> /sys/devices/cpu/ht_bug_workaround
>>
>> to activate/deactivate the PMU HT bug workaround.
>>
>>
On Tue, 18 Nov 2014, Borislav Petkov wrote:
> On Tue, Nov 18, 2014 at 12:38:14AM +0100, Thomas Gleixner wrote:
> > Well a bitmask is a pretty indescriptive item as well. Putting my user
> > hat on: Where is the documentation for the bits?
>
> $ cat /sys/devices/system/cpu/bugs
> 0xXX - current
On Tue, Nov 18, 2014 at 12:38:14AM +0100, Thomas Gleixner wrote:
> Well a bitmask is a pretty indescriptive item as well. Putting my user
> hat on: Where is the documentation for the bits?
$ cat /sys/devices/system/cpu/bugs
0xXX - currently enabled workarounds are the set bits.
bit 0: workarou
On Tue, 18 Nov 2014, Borislav Petkov wrote:
> On Mon, Nov 17, 2014 at 08:07:05PM +0100, Stephane Eranian wrote:
> > From: Maria Dimakopoulou
> >
> > This patch adds a sysfs entry:
> >
> > /sys/devices/cpu/ht_bug_workaround
> >
> > to activate/deactivate the PMU HT bug workaround.
> >
> > T
On Mon, Nov 17, 2014 at 08:07:05PM +0100, Stephane Eranian wrote:
> From: Maria Dimakopoulou
>
> This patch adds a sysfs entry:
>
> /sys/devices/cpu/ht_bug_workaround
>
> to activate/deactivate the PMU HT bug workaround.
>
> To activate (activated by default):
> # echo 1 > /sys/devices/
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