From 1eea6fc028a63034799f7eb8954f6a4b17aaa646 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Fri, 26 Feb 2016 09:15:11 -0600
Subject: [PATCH] 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 <bhelgaas@google.com>
Tested-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/pci/fixup.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index e58565556703..0ae7e9fa348d 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -540,3 +540,10 @@ 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);
--
2.30.9