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x86/MCE: Cleanup and complete struct mce fields definitions 

The struct is part of the uapi, document that fact and all fields properly
and fix formatting.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20180306142143.19990-3-bp@alien8.de
This commit is contained in:
Borislav Petkov 2018-03-06 15:21:42 +01:00 committed by Thomas Gleixner
parent 422caa5f7a
commit 24193c5de4
1 changed files with 28 additions and 24 deletions
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52
arch/x86/include/uapi/asm/mce.h
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@ -5,32 +5,36 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/ioctl.h> #include <linux/ioctl.h>
/* Fields are zero when not available */ /*
* Fields are zero when not available. Also, this struct is shared with
* userspace mcelog and thus must keep existing fields at current offsets.
* Only add new fields to the end of the structure
*/
struct mce { struct mce {
__u64 status; __u64 status; /* Bank's MCi_STATUS MSR */
__u64 misc; __u64 misc; /* Bank's MCi_MISC MSR */
__u64 addr; __u64 addr; /* Bank's MCi_ADDR MSR */
__u64 mcgstatus; __u64 mcgstatus; /* Machine Check Global Status MSR */
__u64 ip; __u64 ip; /* Instruction Pointer when the error happened */
__u64 tsc; /* cpu time stamp counter */ __u64 tsc; /* CPU time stamp counter */
__u64 time; /* wall time_t when error was detected */ __u64 time; /* Wall time_t when error was detected */
__u8 cpuvendor; /* cpu vendor as encoded in system.h */ __u8 cpuvendor; /* Kernel's X86_VENDOR enum */
__u8 inject_flags; /* software inject flags */ __u8 inject_flags; /* Software inject flags */
__u8 severity; __u8 severity; /* Error severity */
__u8 pad; __u8 pad;
__u32 cpuid; /* CPUID 1 EAX */ __u32 cpuid; /* CPUID 1 EAX */
__u8 cs; /* code segment */ __u8 cs; /* Code segment */
__u8 bank; /* machine check bank */ __u8 bank; /* Machine check bank reporting the error */
__u8 cpu; /* cpu number; obsolete; use extcpu now */ __u8 cpu; /* CPU number; obsoleted by extcpu */
__u8 finished; /* entry is valid */ __u8 finished; /* Entry is valid */
__u32 extcpu; /* linux cpu number that detected the error */ __u32 extcpu; /* Linux CPU number that detected the error */
__u32 socketid; /* CPU socket ID */ __u32 socketid; /* CPU socket ID */
__u32 apicid; /* CPU initial apic ID */ __u32 apicid; /* CPU initial APIC ID */
__u64 mcgcap; /* MCGCAP MSR: machine check capabilities of CPU */ __u64 mcgcap; /* MCGCAP MSR: machine check capabilities of CPU */
__u64 synd; /* MCA_SYND MSR: only valid on SMCA systems */ __u64 synd; /* MCA_SYND MSR: only valid on SMCA systems */
__u64 ipid; /* MCA_IPID MSR: only valid on SMCA systems */ __u64 ipid; /* MCA_IPID MSR: only valid on SMCA systems */
__u64 ppin; /* Protected Processor Inventory Number */ __u64 ppin; /* Protected Processor Inventory Number */
__u32 microcode;/* Microcode revision */ __u32 microcode; /* Microcode revision */
}; };
#define MCE_GET_RECORD_LEN _IOR('M', 1, int) #define MCE_GET_RECORD_LEN _IOR('M', 1, int)