From 382746376993cfa6d6c4e546c67384201c0f3a82 Mon Sep 17 00:00:00 2001 From: Yongji Xie Date: Mon, 10 Apr 2017 19:58:13 +0800 Subject: powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned Override pcibios_default_alignment() to set default alignment to PAGE_SIZE for all PCI devices on PowerNV platform. Thus sub-page BARs would not share a page and could be mapped into guest when VFIO passthrough them. Signed-off-by: Yongji Xie Signed-off-by: Bjorn Helgaas --- arch/powerpc/kernel/pci-common.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/powerpc/kernel/pci-common.c') diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index ffda24a38dda..03a7c9f58126 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -233,6 +233,14 @@ void pcibios_reset_secondary_bus(struct pci_dev *dev) pci_reset_secondary_bus(dev); } +resource_size_t pcibios_default_alignment(void) +{ + if (ppc_md.pcibios_default_alignment) + return ppc_md.pcibios_default_alignment(); + + return 0; +} + #ifdef CONFIG_PCI_IOV resource_size_t pcibios_iov_resource_alignment(struct pci_dev *pdev, int resno) { -- cgit