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| author | Yongji Xie <elohimes@gmail.com> | 2017-04-10 13:58:13 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-04-19 19:51:26 +0200 |
| commit | 382746376993cfa6d6c4e546c67384201c0f3a82 (patch) | |
| tree | f51dc2c2c9130559dd400eeed5c08304c0c371dc /arch/powerpc/kernel/pci-common.c | |
| parent | PCI: Add pcibios_default_alignment() for arch-specific alignment control (diff) | |
| download | linux-382746376993cfa6d6c4e546c67384201c0f3a82.tar.xz linux-382746376993cfa6d6c4e546c67384201c0f3a82.zip | |
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 <elohimes@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/powerpc/kernel/pci-common.c')
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 8 |
1 files changed, 8 insertions, 0 deletions
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) { |