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| author | Andreas Herrmann <andreas.herrmann3@amd.com> | 2010-03-19 07:09:22 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-01 19:01:54 -0400 |
| commit | b89725179b5fc5ea585930420c7df568de0a97be (patch) | |
| tree | 153f64f908780ef295b24c06bc697c19103b0ce9 /arch/x86/include/asm/bitsperlong.h | |
| parent | 9fcb3fd97bccf736945cccdd74005d64be9602e1 (diff) | |
x86, amd: Restrict usage of c1e_idle()
commit 035a02c1e1de31888e8b6adac0ff667971ac04db upstream.
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.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/x86/include/asm/bitsperlong.h')
0 files changed, 0 insertions, 0 deletions