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authorBjorn Helgaas <bhelgaas@google.com>2020-10-21 17:58:34 +0300
committerBjorn Helgaas <bhelgaas@google.com>2020-10-21 17:58:34 +0300
commit28a18aec59551e0f86f0983c0eec7b6470632790 (patch)
tree58a2831fa644f19b8b2c44ea93fe30a2435ea3fb /drivers/pci/pci.c
parenta9f379068cc6e63fc64ac9bab635e633a953857f (diff)
parentb0e85c3c8554944c6ec599656931b54062c38823 (diff)
downloadlinux-28a18aec59551e0f86f0983c0eec7b6470632790.tar.xz
Merge branch 'pci/enumeration'
- Tone down message about missing optional MCFG (Jeremy Linton) - Add schedule point in pci_read_config() (Jiang Biao) - Add Ampere Altra SOC MCFG quirk (Tuan Phan) - Add Kconfig options for MPS/MRRS strategy (Jim Quinlan) * pci/enumeration: PCI: Add Kconfig options for MPS/MRRS strategy PCI/ACPI: Add Ampere Altra SOC MCFG quirk PCI: Add schedule point in pci_read_config() PCI/ACPI: Tone down missing MCFG message
Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r--drivers/pci/pci.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 8b649b01aad3..f3f64016fe32 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -101,7 +101,19 @@ unsigned long pci_hotplug_mmio_pref_size = DEFAULT_HOTPLUG_MMIO_PREF_SIZE;
#define DEFAULT_HOTPLUG_BUS_SIZE 1
unsigned long pci_hotplug_bus_size = DEFAULT_HOTPLUG_BUS_SIZE;
+
+/* PCIe MPS/MRRS strategy; can be overridden by kernel command-line param */
+#ifdef CONFIG_PCIE_BUS_TUNE_OFF
+enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_TUNE_OFF;
+#elif defined CONFIG_PCIE_BUS_SAFE
+enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_SAFE;
+#elif defined CONFIG_PCIE_BUS_PERFORMANCE
+enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_PERFORMANCE;
+#elif defined CONFIG_PCIE_BUS_PEER2PEER
+enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_PEER2PEER;
+#else
enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_DEFAULT;
+#endif
/*
* The default CLS is used if arch didn't set CLS explicitly and not