MCE-INJECT(8) Linux's Administrator's Manual MCE-INJECT(8)NAMEmce-inject - Inject machine checks into x86 kernel for testing
SYNOPSISmce-inject mce-file1 ...
mce-inject < mce-file
DESCRIPTIONmce-inject allows to inject machine checks in a running x86 Linux ker‐
nel. machine checks are internal CPU errors. This tool is intended to
test the machine check handling code. The injection only happens on
the software level and does not simulate full machine check handling on
the platform level. The machine checks to be injected are described in
a input language similar to the format the kernel outputs on a panic
message (with a few extension). In general you should be able to pipe
in a panic message to inject that mce. See the IA32 SDM Vol3a chapter
14 for the details on fields. They correspond to the machine check MSRs
of the standard IA32 Machine check architecture described there.
INPUT LANGUAGE
These generally represent the similarly CPU MSRs, with some metadata on
where to inject the exception. Please see the IA software developers
Manual for more details.
The machine check always starts with MCE or CPU number|broadcast [bank-
number] Machine check is injected on CPU xx or broadcasted to all CPUs
BANK bank-number Machine check bank to inject on.
STATUS {number|fatal|corrected|uncor‐
rected|pcc|uc|val|en|over|ar|ucna|srao|srar|s}
The symbols generally represent hardware register bits, as documented
in the Intel software developer's manual. When multiple are listed
they are ored together.
MCGSTATUS {number|mcip|ripv|eipv}
The symbols generally represent hardware register bits, as documented
in the Intel software developer's manual. When multiple are listed
they are ored together.
ADDR number
RIP number RIP number:<number>{string} RIP number:number
MISC number
CPU number : machine check exception : number BANK number : number
parsed for compatibility with kernel output. Use explicit statements
TSC number TSC state injected in machine check
NOBROADCAST Don't broadcast exceptions to all CPUs. Default is to
broadcast UC
IRQBROADCAST Broadcast IRQ to all CPUs that not getting error injec‐
tion.
NMIBROADCAST Broadcast NMI to all CPUs that not getting error injec‐
tion.
IN_IRQ MCE should be injected in interrupt context
IN_PROC MCE injected in process context.
HOLD Don't inject MCE immediately but hold it for later injection. This
is useful for testing injection on multiple CPUs in parallel
SOCKETID number Socketid. Ignored by kernel on injection.
MCGCAP number Machine check capabilities register value. Currently
ignored by kernel on injection.
POLL Inject in machine check poller code.
EXCP Inject as machine check exception.
APICID number APIC ID of CPU. Ignored by kernel on injection.
A list of symbols ors the symbols together.
Multiple fields can be on a line. number can be hex/octal/decimal in
the usual C format. Multiple machine checks can be in a single file,
each new one starts with "CPU" or "MCE". For all missing fields rea‐
sonable default values are filled in (hopefully) Comments start with #
until the end of the line The keywords are case-insensitive.
REQUIREMENTSmce-inject to run as root. /dev/mcelog has to exist. The kernels needs
to have machine check injection ( CONFIG_X86_MCE_INJECT ) enabled and
if modular the mce-inject module loaded. This option is available in
Linux 2.6.31 or later.
NOTES
The mce-test package has a lot of input file examples.
SEE ALSO
Intel 64 and IA32 Architectures Software Developer's manual, Volume 3,
System programming guide Parts 1 and 2. Machine checks are described in
Chapter 14 in Part1 and in Append ix E in Part2.
Datasheet of your CPU.
Intel OTC May 2009 MCE-INJECT(8)
