From 10a2aa03c773f79fca270a304908b92bed70ee1d Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 26 Feb 2016 09:15:11 -0600 Subject: x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs commit b894157145e4ac7598d7062bc93320898a5e059e upstream. The Home Agent and PCU PCI devices in Broadwell-EP have a non-BAR register where a BAR should be. We don't know what the side effects of sizing the "BAR" would be, and we don't know what address space the "BAR" might appear to describe. Mark these devices as having non-compliant BARs so the PCI core doesn't touch them. Signed-off-by: Bjorn Helgaas Tested-by: Andi Kleen Signed-off-by: Ben Hutchings --- arch/x86/pci/fixup.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index 9a2b7101ae8a..f16af96c60a2 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -553,3 +553,10 @@ static void twinhead_reserve_killing_zone(struct pci_dev *dev) } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone); + +static void pci_bdwep_bar(struct pci_dev *dev) +{ + dev->non_compliant_bars = 1; +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_bdwep_bar); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_bdwep_bar); -- cgit v1.2.3