Messages in this thread Patch in this message | | | Date | Fri, 29 May 2020 18:12:54 -0500 | From | Bjorn Helgaas <> | Subject | Re: [PATCH v4 3/5] ACPI/PCI: Ignore _OSC negotiation result if pcie_ports_native is set. |
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On Tue, May 26, 2020 at 04:18:27PM -0700, sathyanarayanan.kuppuswamy@linux.intel.com wrote: > From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> > > pcie_ports_native is set only if user requests native handling > of PCIe capabilities via pcie_port_setup command line option. > User input takes precedence over _OSC based control negotiation > result. So consider the _OSC negotiated result only if > pcie_ports_native is unset. > > Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> > --- > drivers/acpi/pci_root.c | 26 ++++++++++++++------------ > 1 file changed, 14 insertions(+), 12 deletions(-) > > diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c > index 9e235c1a75ff..e0039ad3480a 100644 > --- a/drivers/acpi/pci_root.c > +++ b/drivers/acpi/pci_root.c > @@ -914,18 +914,20 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, > goto out_release_info; > > host_bridge = to_pci_host_bridge(bus->bridge); > - if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)) > - host_bridge->native_pcie_hotplug = 0; > - if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL)) > - host_bridge->native_shpc_hotplug = 0; > - if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL)) > - host_bridge->native_aer = 0; > - if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL)) > - host_bridge->native_pme = 0; > - if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL)) > - host_bridge->native_ltr = 0; > - if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL)) > - host_bridge->native_dpc = 0; > + if (!pcie_ports_native) { > + if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)) > + host_bridge->native_pcie_hotplug = 0; > + if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL)) > + host_bridge->native_shpc_hotplug = 0; > + if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL)) > + host_bridge->native_aer = 0; > + if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL)) > + host_bridge->native_pme = 0; > + if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL)) > + host_bridge->native_ltr = 0; > + if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL)) > + host_bridge->native_dpc = 0; > + }
I like this, but what I had in mind was to *remove* the tests of pcie_ports_native elsewhere at the same time.
For example,
@@ -255,7 +255,7 @@ static bool pme_is_native(struct pcie_device *dev) const struct pci_host_bridge *host;
host = pci_find_host_bridge(dev->port->bus); - return pcie_ports_native || host->native_pme; + return host->native_pme; }
and
@@ -221,7 +221,7 @@ int pcie_aer_is_native(struct pci_dev *dev) if (!dev->aer_cap) return 0;
- return pcie_ports_native || host->native_aer; + return host->native_aer; }
So I deferred these two _OSC-related things for now. We can work on this more in the next cycle.
> /* > * Evaluate the "PCI Boot Configuration" _DSM Function. If it > -- > 2.17.1
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