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authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-13 13:14:54 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-13 13:14:54 -0800
commit8e66791a80abd0e86ac1995395129791eefe50b5 (patch)
tree3a74d712f47818c9e9f8517251532ac35d88060e /Documentation
parented93de8420a342785da7585b06c107ae32f73b2b (diff)
parent03a551734cfc2b93f83950a595974e3c9cbd82fd (diff)
downloadlinux-8e66791a80abd0e86ac1995395129791eefe50b5.tar.bz2
Merge tag 'pci-v4.15-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas: "Fix AMD boot regression due to 64-bit window conflicting with system memory (Christian König)" * tag 'pci-v4.15-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: x86/PCI: Move and shrink AMD 64-bit window to avoid conflict x86/PCI: Add "pci=big_root_window" option for AMD 64-bit windows
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index a626465dd877..faccc582c0f9 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3097,6 +3097,12 @@
pcie_scan_all Scan all possible PCIe devices. Otherwise we
only look for one device below a PCIe downstream
port.
+ big_root_window Try to add a big 64bit memory window to the PCIe
+ root complex on AMD CPUs. Some GFX hardware
+ can resize a BAR to allow access to all VRAM.
+ Adding the window is slightly risky (it may
+ conflict with unreported devices), so this
+ taints the kernel.
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
Management.