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| author | =?UTF-8?q?Christian=20K=C3=B6nig?= <[email protected]> | 2018-01-11 13:23:29 +0000 |
|---|---|---|
| committer | Bjorn Helgaas <[email protected]> | 2018-01-11 17:22:39 +0000 |
| commit | f32ab7547161b9fa7ebfbc4f18ea1eb3fd49fe25 (patch) | |
| tree | f806a04056ffadf4bdc92e4d70e1ff1488c713b0 /tools/perf/scripts/python/netdev-times.py | |
| parent | Linux 4.15-rc4 (diff) | |
| download | kernel-f32ab7547161b9fa7ebfbc4f18ea1eb3fd49fe25.tar.gz kernel-f32ab7547161b9fa7ebfbc4f18ea1eb3fd49fe25.zip | |
x86/PCI: Add "pci=big_root_window" option for AMD 64-bit windows
Only try to enable a 64-bit window on AMD CPUs when "pci=big_root_window"
is specified.
This taints the kernel because the new 64-bit window uses address space we
don't know anything about, and it may contain unreported devices or memory
that would conflict with the window.
The pci_amd_enable_64bit_bar() quirk that enables the window is specific to
AMD CPUs. The generic solution would be to have the firmware enable the
window and describe it in the host bridge's _CRS method, or at least
describe it in the _PRS method so the OS would have the option of enabling
it.
Signed-off-by: Christian König <[email protected]>
[bhelgaas: changelog, extend doc, mention taint in dmesg]
Signed-off-by: Bjorn Helgaas <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
0 files changed, 0 insertions, 0 deletions