> On 23-Nov-2020, at 4:49 PM, Michael Ellerman wrote:
>
> Hi Athira,
>
> Athira Rajeev writes:
>> On systems without any platform specific PMU driver support registered or
>> Generic Compat PMU support registered,
>
> The compat PMU is registered just like other PMUs, so I don't see how we
Hi Athira,
Athira Rajeev writes:
> On systems without any platform specific PMU driver support registered or
> Generic Compat PMU support registered,
The compat PMU is registered just like other PMUs, so I don't see how we
can crash like this if the compat PMU is active?
ie. if we're using the
> When perf record session started with "-I" option, capture registers
> via intr-regs, on each sample ‘is_sier_available()'i is called to check
> for the SIER ( Sample Instruction Event Register) availability in the
> platform. This function in core-book3s access 'ppmu->flags'. If platform
> speci
On systems without any platform specific PMU driver support registered or
Generic Compat PMU support registered, running 'perf record' with
—intr-regs will crash ( perf record -I ).
The relevant portion from crash logs and Call Trace:
Unable to handle kernel paging request for data at address 0
