Re: [PATCH 2/3] perf/dwc_pcie: Load DesignWare PCIe PMU driver automatically on Ampere SoCs

[Ilkka Koskinen]

Hi Shuai,

On Wed, 9 Oct 2024, Shuai Xue wrote:
> 在 2024/10/9 07:18, Ilkka Koskinen 写道:
> > Load DesignWare PCIe PMU driver automatically if the system has a PCI
> > bridge by Ampere.
> >
> > Signed-off-by: Ilkka Koskinen <ilkka@xxxxxxxxxxxxxxxxxxxxxx>
> > ---
> >   drivers/perf/dwc_pcie_pmu.c | 10 ++++++++++
> >   1 file changed, 10 insertions(+)
> >
> > diff --git a/drivers/perf/dwc_pcie_pmu.c b/drivers/perf/dwc_pcie_pmu.c
> > index 3581d916d851..d752168733cf 100644
> > --- a/drivers/perf/dwc_pcie_pmu.c
> > +++ b/drivers/perf/dwc_pcie_pmu.c
> > @@ -782,6 +782,16 @@ static void __exit dwc_pcie_pmu_exit(void)
> >   module_init(dwc_pcie_pmu_init);
> >   module_exit(dwc_pcie_pmu_exit);
> >   +static const struct pci_device_id dwc_pcie_pmu_table[] = {
> > +	{
> > +		PCI_DEVICE(PCI_VENDOR_ID_AMPERE, PCI_ANY_ID),
>
> Hi, Ilkka,
>
> Does all Ampere PCI bridge use this IP?

I have checked Altra, AltraMax and AmpereOne SoCs and they all do. 
Unfortunately, I don't have access to eMAG at this point. If the IP
will be changed and the feature won't be supported in the future SoCs,
I can certainly change the logic to accept only certain SoCs.

Cheers, Ilkka

> Best Regards,
> Shuai