diff mbox series

[v3,4/6] powerpc/powernv/pci: Enable reassigning the bus numbers

Message ID 20180911115620.10507-5-s.miroshnichenko@yadro.com (mailing list archive)
State Superseded
Headers show
Series powerpc/powernv/pci: Discover surprise-hotplugged PCIe devices during rescan | expand

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Commit Message

Sergei Miroshnichenko Sept. 11, 2018, 11:56 a.m. UTC 
PowerNV doesn't depend on PCIe topology info from DT anymore, and now
it is able to enumerate the fabric and assign the bus numbers.

This is enabled by the pci=realloc command line switch.

Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko@yadro.com>
---
 arch/powerpc/kernel/pci_dn.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 8bcf10fb13ad..863d00561c50 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -592,3 +592,15 @@  static void pci_dev_pdn_setup(struct pci_dev *pdev)
 	pdev->dev.archdata.pci_data = pdn;
 }
 DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, pci_dev_pdn_setup);
+
+char * __init pcibios_setup(char *str)
+{
+	if (!strncmp(str, "realloc=", 8)) {
+		if (!strncmp(str + 8, "on", 2))
+			pci_add_flags(PCI_REASSIGN_ALL_BUS);
+	} else if (!strncmp(str, "realloc", 7)) {
+		pci_add_flags(PCI_REASSIGN_ALL_BUS);
+	}
+
+	return str;
+}