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| author | Tony Luck <tony.luck@intel.com> | 2017-09-25 16:39:33 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-09-27 12:10:10 +0200 |
| commit | 9b3a7fd0f5fb583a8fdda678e8a87dff1717f7f3 (patch) | |
| tree | 21157e2dc7f1d2e0c8eda0f349b77e7b24ddaa1f /arch/x86/kernel/cpu/intel_rdt.h | |
| parent | e19b205be43d11bff638cad4487008c48d21c103 (diff) | |
| download | linux-9b3a7fd0f5fb583a8fdda678e8a87dff1717f7f3.tar.gz linux-9b3a7fd0f5fb583a8fdda678e8a87dff1717f7f3.tar.bz2 linux-9b3a7fd0f5fb583a8fdda678e8a87dff1717f7f3.zip | |
x86/intel_rdt: Add framework for better RDT UI diagnostics
Commands are given to the resctrl file system by making/removing
directories, or by writing to files. When something goes wrong
the user is generally left wondering why they got:
bash: echo: write error: Invalid argument
Add a new file "last_cmd_status" to the "info" directory that
will give the user some better clues on what went wrong.
Provide functions to clear and update last_cmd_status which
check that we hold the rdtgroup_mutex.
[ tglx: Made last_cmd_status static and folded back the hunk from patch 3
which replaces the open coded access to last_cmd_status with the
accessor function ]
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Vikas Shivappa <vikas.shivappa@intel.com>
Cc: Boris Petkov <bp@suse.de>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lkml.kernel.org/r/edc4e0e9741eee89bba569f0021b1b2662fd9508.1506382469.git.tony.luck@intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt.h')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h index ebaddaeef023..9d3148d88ec8 100644 --- a/arch/x86/kernel/cpu/intel_rdt.h +++ b/arch/x86/kernel/cpu/intel_rdt.h @@ -126,12 +126,15 @@ struct rdtgroup { #define RFTYPE_BASE BIT(1) #define RF_CTRLSHIFT 4 #define RF_MONSHIFT 5 +#define RF_TOPSHIFT 6 #define RFTYPE_CTRL BIT(RF_CTRLSHIFT) #define RFTYPE_MON BIT(RF_MONSHIFT) +#define RFTYPE_TOP BIT(RF_TOPSHIFT) #define RFTYPE_RES_CACHE BIT(8) #define RFTYPE_RES_MB BIT(9) #define RF_CTRL_INFO (RFTYPE_INFO | RFTYPE_CTRL) #define RF_MON_INFO (RFTYPE_INFO | RFTYPE_MON) +#define RF_TOP_INFO (RFTYPE_INFO | RFTYPE_TOP) #define RF_CTRL_BASE (RFTYPE_BASE | RFTYPE_CTRL) /* List of all resource groups */ @@ -408,6 +411,10 @@ union cpuid_0x10_x_edx { unsigned int full; }; +void rdt_last_cmd_clear(void); +void rdt_last_cmd_puts(const char *s); +void rdt_last_cmd_printf(const char *fmt, ...); + void rdt_ctrl_update(void *arg); struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn); void rdtgroup_kn_unlock(struct kernfs_node *kn); |