diff options
| author | =?UTF-8?q?Christian=20K=C3=B6nig?= <ckoenig.leichtzumerken@gmail.com> | 2018-01-11 14:23:30 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <helgaas@kernel.org> | 2018-01-11 12:01:58 -0600 |
| commit | 03a551734cfc2b93f83950a595974e3c9cbd82fd (patch) | |
| tree | 51e78945b9696c8ec7219ed412ee75607e4a11c8 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | f32ab7547161b9fa7ebfbc4f18ea1eb3fd49fe25 (diff) | |
x86/PCI: Move and shrink AMD 64-bit window to avoid conflict
Avoid problems with BIOS implementations which don't report all used
resources to the OS by only allocating a 256GB window directly below the
hardware limit (from the BKDG, sec 2.4.6).
Fixes a silent reboot loop reported by Aaro Koskinen <aaro.koskinen@iki.fi>
on an AMD-based MSI MS-7699/760GA-P43(FX) system. This was apparently
caused by RAM or other unreported hardware that conflicted with the new
window.
Link: https://support.amd.com/TechDocs/49125_15h_Models_30h-3Fh_BKDG.pdf
Link: https://lkml.kernel.org/r/20180105220412.fzpwqe4zljdawr36@darkstar.musicnaut.iki.fi
Fixes: fa564ad96366 ("x86/PCI: Enable a 64bit BAR on AMD Family 15h (Models 00-1f, 30-3f, 60-7f)")
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Christian König <christian.koenig@amd.com>
[bhelgaas: changelog, comment, Fixes:]
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
0 files changed, 0 insertions, 0 deletions