On 2021-01-21 00:18, Mathieu Poirier wrote:
On Tue, Jan 19, 2021 at 08:36:22AM +, Al Grant wrote:
Hi Sai,
> From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
> Hi Mathieu,
>
> On 2021-01-19 01:53, Mathieu Poirier wrote:
> > On Fri, Jan 15, 2021 at 11:16:24AM +0530, Sai Prakash Ranjan
On Tue, Jan 19, 2021 at 08:36:22AM +, Al Grant wrote:
> Hi Sai,
>
> > From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
> > Hi Mathieu,
> >
> > On 2021-01-19 01:53, Mathieu Poirier wrote:
> > > On Fri, Jan 15, 2021 at 11:16:24AM +0530, Sai Prakash Ranjan wrote:
> > >> Hello Mathieu, Su
Hi Al,
On 2021-01-19 17:26, Al Grant wrote:
From: Suzuki K Poulose
On 1/19/21 9:51 AM, Sai Prakash Ranjan wrote:
> Hi Al,
>
> On 2021-01-19 14:06, Al Grant wrote:
>> Hi Sai,
>>
>>> From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
>>> Hi Mathieu,
>>>
>>> On 2021-01-19 01:53, Mathieu Poir
Hi Suzuki,
On 2021-01-19 16:03, Suzuki K Poulose wrote:
On 1/19/21 9:51 AM, Sai Prakash Ranjan wrote:
Hi Al,
On 2021-01-19 14:06, Al Grant wrote:
Hi Sai,
From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
Hi Mathieu,
On 2021-01-19 01:53, Mathieu Poirier wrote:
> On Fri, Jan 15, 2021
> From: Suzuki K Poulose
> On 1/19/21 9:51 AM, Sai Prakash Ranjan wrote:
> > Hi Al,
> >
> > On 2021-01-19 14:06, Al Grant wrote:
> >> Hi Sai,
> >>
> >>> From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
> >>> Hi Mathieu,
> >>>
> >>> On 2021-01-19 01:53, Mathieu Poirier wrote:
> >>> > On Fri
On 1/19/21 9:51 AM, Sai Prakash Ranjan wrote:
Hi Al,
On 2021-01-19 14:06, Al Grant wrote:
Hi Sai,
From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
Hi Mathieu,
On 2021-01-19 01:53, Mathieu Poirier wrote:
> On Fri, Jan 15, 2021 at 11:16:24AM +0530, Sai Prakash Ranjan wrote:
>> Hello Ma
Hi Al,
On 2021-01-19 14:06, Al Grant wrote:
Hi Sai,
From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
Hi Mathieu,
On 2021-01-19 01:53, Mathieu Poirier wrote:
> On Fri, Jan 15, 2021 at 11:16:24AM +0530, Sai Prakash Ranjan wrote:
>> Hello Mathieu, Suzuki
>>
>> On 2020-10-15 21:32, Mathie
Hi Mathieu,
On 2021-01-19 01:53, Mathieu Poirier wrote:
On Fri, Jan 15, 2021 at 11:16:24AM +0530, Sai Prakash Ranjan wrote:
Hello Mathieu, Suzuki
On 2020-10-15 21:32, Mathieu Poirier wrote:
> On Thu, Oct 15, 2020 at 06:15:22PM +0530, Sai Prakash Ranjan wrote:
> > On production systems with ETM
Hi Sai,
> From: saiprakash.ranjan=codeaurora@mg.codeaurora.org
> Hi Mathieu,
>
> On 2021-01-19 01:53, Mathieu Poirier wrote:
> > On Fri, Jan 15, 2021 at 11:16:24AM +0530, Sai Prakash Ranjan wrote:
> >> Hello Mathieu, Suzuki
> >>
> >> On 2020-10-15 21:32, Mathieu Poirier wrote:
> >> > On Thu,
On 2021-01-18 20:17, Mattias Nissler wrote:
On Fri, Jan 15, 2021 at 6:46 AM Sai Prakash Ranjan
wrote:
Hello Mathieu, Suzuki
On 2020-10-15 21:32, Mathieu Poirier wrote:
> On Thu, Oct 15, 2020 at 06:15:22PM +0530, Sai Prakash Ranjan wrote:
>> On production systems with ETMs enabled, it is prefe
On Fri, Jan 15, 2021 at 11:16:24AM +0530, Sai Prakash Ranjan wrote:
> Hello Mathieu, Suzuki
>
> On 2020-10-15 21:32, Mathieu Poirier wrote:
> > On Thu, Oct 15, 2020 at 06:15:22PM +0530, Sai Prakash Ranjan wrote:
> > > On production systems with ETMs enabled, it is preferred to
> > > exclude kernel
On Fri, Jan 15, 2021 at 6:46 AM Sai Prakash Ranjan
wrote:
>
> Hello Mathieu, Suzuki
>
> On 2020-10-15 21:32, Mathieu Poirier wrote:
> > On Thu, Oct 15, 2020 at 06:15:22PM +0530, Sai Prakash Ranjan wrote:
> >> On production systems with ETMs enabled, it is preferred to
> >> exclude kernel mode(NS E
Hello Mathieu, Suzuki
On 2020-10-15 21:32, Mathieu Poirier wrote:
On Thu, Oct 15, 2020 at 06:15:22PM +0530, Sai Prakash Ranjan wrote:
On production systems with ETMs enabled, it is preferred to
exclude kernel mode(NS EL1) tracing for security concerns and
support only userspace(NS EL0) tracing.
On 10/16/20 2:14 PM, Leo Yan wrote:
On Fri, Oct 16, 2020 at 12:38:47PM +0100, Suzuki Kuruppassery Poulose wrote:
[...]
What happens to the sysfs mode of tracing? For that we would still
need a config right to exclude kernel mode tracing completely.
IIUC, sysfs mode and perf mode both can app
On Fri, Oct 16, 2020 at 12:38:47PM +0100, Suzuki Kuruppassery Poulose wrote:
[...]
> > > What happens to the sysfs mode of tracing? For that we would still
> > > need a config right to exclude kernel mode tracing completely.
> >
> > IIUC, sysfs mode and perf mode both can apply the same approach
On 10/16/20 10:24 AM, Leo Yan wrote:
Hi Sai,
On Fri, Oct 16, 2020 at 02:10:47PM +0530, Sai Prakash Ranjan wrote:
Hi Leo,
On 2020-10-16 12:54, Leo Yan wrote:
On Thu, Oct 15, 2020 at 11:40:05PM -0700, Denis Nikitin wrote:
Hi Mathieu,
I think one of the use cases could be VMs.
Is there isolati
On 10/16/20 7:40 AM, Denis Nikitin wrote:
Hi Mathieu,
I think one of the use cases could be VMs.
Is there isolation between EL1 guest kernels which we can control from
perf in a system wide mode?
The proposed solution doesn't solve this for VMs anyway. It only
excludes EL1 *OR* EL2, depending
Hi Leo,
On 2020-10-16 14:54, Leo Yan wrote:
Hi Sai,
On Fri, Oct 16, 2020 at 02:10:47PM +0530, Sai Prakash Ranjan wrote:
Hi Leo,
On 2020-10-16 12:54, Leo Yan wrote:
> On Thu, Oct 15, 2020 at 11:40:05PM -0700, Denis Nikitin wrote:
> > Hi Mathieu,
> >
> > I think one of the use cases could be VM
Hi Sai,
On Fri, Oct 16, 2020 at 02:10:47PM +0530, Sai Prakash Ranjan wrote:
> Hi Leo,
>
> On 2020-10-16 12:54, Leo Yan wrote:
> > On Thu, Oct 15, 2020 at 11:40:05PM -0700, Denis Nikitin wrote:
> > > Hi Mathieu,
> > >
> > > I think one of the use cases could be VMs.
> > > Is there isolation betwe
Hi Leo,
On 2020-10-16 12:54, Leo Yan wrote:
On Thu, Oct 15, 2020 at 11:40:05PM -0700, Denis Nikitin wrote:
Hi Mathieu,
I think one of the use cases could be VMs.
Is there isolation between EL1 guest kernels which we can control from
perf
in a system wide mode?
Sorry for suddenly jumping in
Hi Suzuki,
On 2020-10-15 19:57, Suzuki K Poulose wrote:
Hi Sai,
On 10/15/2020 01:45 PM, Sai Prakash Ranjan wrote:
On production systems with ETMs enabled, it is preferred to
exclude kernel mode(NS EL1) tracing for security concerns and
support only userspace(NS EL0) tracing. So provide an opti
On Thu, Oct 15, 2020 at 11:40:05PM -0700, Denis Nikitin wrote:
> Hi Mathieu,
>
> I think one of the use cases could be VMs.
> Is there isolation between EL1 guest kernels which we can control from perf
> in a system wide mode?
Sorry for suddenly jumping in.
For KVM, I think we need to implement
On Thu, Oct 15, 2020 at 06:15:22PM +0530, Sai Prakash Ranjan wrote:
> On production systems with ETMs enabled, it is preferred to
> exclude kernel mode(NS EL1) tracing for security concerns and
> support only userspace(NS EL0) tracing. So provide an option
> via kconfig to exclude kernel mode traci
Hi Sai,
On 10/15/2020 01:45 PM, Sai Prakash Ranjan wrote:
On production systems with ETMs enabled, it is preferred to
exclude kernel mode(NS EL1) tracing for security concerns and
support only userspace(NS EL0) tracing. So provide an option
via kconfig to exclude kernel mode tracing if it is req
On production systems with ETMs enabled, it is preferred to
exclude kernel mode(NS EL1) tracing for security concerns and
support only userspace(NS EL0) tracing. So provide an option
via kconfig to exclude kernel mode tracing if it is required.
This config is disabled by default and would not affec
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