diff options
| author | Andreas Herrmann <andreas.herrmann3@amd.com> | 2010-03-19 12:09:22 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-03-19 14:43:36 -0700 |
| commit | 035a02c1e1de31888e8b6adac0ff667971ac04db (patch) | |
| tree | aae59332c2e409f0a725123a8f514256a41cf869 /kernel/groups.c | |
| parent | ff30a0543e9a6cd732582063e7cae951cdb7acf2 (diff) | |
x86, amd: Restrict usage of c1e_idle()
Currently c1e_idle returns true for all CPUs greater than or equal to
family 0xf model 0x40. This covers too many CPUs.
Meanwhile a respective erratum for the underlying problem was filed
(#400). This patch adds the logic to check whether erratum #400
applies to a given CPU.
Especially for CPUs where SMI/HW triggered C1e is not supported,
c1e_idle() doesn't need to be used. We can check this by looking at
the respective OSVW bit for erratum #400.
Cc: <stable@kernel.org> # .32.x .33.x
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20100319110922.GA19614@alberich.amd.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'kernel/groups.c')
0 files changed, 0 insertions, 0 deletions