On Mon, Jun 07, 2021 at 02:56:24PM +0200, Rafael J. Wysocki wrote: > On Fri, Jun 4, 2021 at 7:09 PM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote: > > If either "pcie_ports_disabled" or Linux doesn't support everything in > > ACPI_PCIE_REQ_SUPPORT, we will never evaluate _OSC at all, so > > the platform won't know that Linux has OSC_PCI_SEGMENT_GROUPS_SUPPORT, > > OSC_PCI_HPX_TYPE_3_SUPPORT, OSC_PCI_EXT_CONFIG_SUPPORT, etc. > > Right. Thanks Bjorn and Rafael. So I think the important thing to do is to issue at least one _OSC call even when Linux is not trying to take control of anything. I look into a clean way to do this and get the kernel messages right. One thing to change is probably only calculating 'control' if !pcie_ports_disabled in negotiate_os_control(). Regards, Joerg
