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author | Yazen Ghannam <yazen.ghannam@amd.com> | 2017-03-30 11:17:14 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-27 07:10:38 (GMT) |
commit | 6966a6579e1bc7b3486bed395e7d6875912a9a9b (patch) | |
tree | be71ac6c72eecf5a7803cb7616d0b2e182e9f04e /mm | |
parent | 1bd55ab13039a0d1c004eeb7a487810138bc42c8 (diff) | |
download | linux-6966a6579e1bc7b3486bed395e7d6875912a9a9b.tar.xz |
x86/mce/AMD: Give a name to MCA bank 3 when accessed with legacy MSRs
commit 29f72ce3e4d18066ec75c79c857bee0618a3504b upstream.
MCA bank 3 is reserved on systems pre-Fam17h, so it didn't have a name.
However, MCA bank 3 is defined on Fam17h systems and can be accessed
using legacy MSRs. Without a name we get a stack trace on Fam17h systems
when trying to register sysfs files for bank 3 on kernels that don't
recognize Scalable MCA.
Call MCA bank 3 "decode_unit" since this is what it represents on
Fam17h. This will allow kernels without SMCA support to see this bank on
Fam17h+ and prevent the stack trace. This will not affect older systems
since this bank is reserved on them, i.e. it'll be ignored.
Tested on AMD Fam15h and Fam17h systems.
WARNING: CPU: 26 PID: 1 at lib/kobject.c:210 kobject_add_internal
kobject: (ffff88085bb256c0): attempted to be registered with empty name!
...
Call Trace:
kobject_add_internal
kobject_add
kobject_create_and_add
threshold_create_device
threshold_init_device
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1490102285-3659-1-git-send-email-Yazen.Ghannam@amd.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions