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| author | Fenghua Yu <fenghua.yu@intel.com> | 2016-10-29 01:04:43 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-10-31 04:10:14 +0300 |
| commit | 4e978d06dedb8207b298a5a8a49fce4b2ab80d12 (patch) | |
| tree | aa41e31fda672544cfa7898f97cc7b8fa17bfaba /arch/x86/include/asm/intel_rdt.h | |
| parent | 5ff193fbde20df5d80fec367cea3e7856c057320 (diff) | |
| download | linux-4e978d06dedb8207b298a5a8a49fce4b2ab80d12.tar.xz | |
x86/intel_rdt: Add "info" files to resctrl file system
For the convenience of applications we make the decoded values of some
of the CPUID values available in read-only (0444) files.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Cc: "Shaohua Li" <shli@fb.com>
Cc: "Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "Peter Zijlstra" <peterz@infradead.org>
Cc: "Stephane Eranian" <eranian@google.com>
Cc: "Dave Hansen" <dave.hansen@intel.com>
Cc: "David Carrillo-Cisneros" <davidcc@google.com>
Cc: "Nilay Vaish" <nilayvaish@gmail.com>
Cc: "Vikas Shivappa" <vikas.shivappa@linux.intel.com>
Cc: "Ingo Molnar" <mingo@elte.hu>
Cc: "Borislav Petkov" <bp@suse.de>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>
Link: http://lkml.kernel.org/r/1477692289-37412-5-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm/intel_rdt.h')
| -rw-r--r-- | arch/x86/include/asm/intel_rdt.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h index 09d00e6f7ad6..5b7b3f6f1f96 100644 --- a/arch/x86/include/asm/intel_rdt.h +++ b/arch/x86/include/asm/intel_rdt.h @@ -27,6 +27,30 @@ extern struct list_head rdt_all_groups; int __init rdtgroup_init(void); /** + * struct rftype - describe each file in the resctrl file system + * @name: file name + * @mode: access mode + * @kf_ops: operations + * @seq_show: show content of the file + * @write: write to the file + */ +struct rftype { + char *name; + umode_t mode; + struct kernfs_ops *kf_ops; + + int (*seq_show)(struct kernfs_open_file *of, + struct seq_file *sf, void *v); + /* + * write() is the generic write callback which maps directly to + * kernfs write operation and overrides all other operations. + * Maximum write size is determined by ->max_write_len. + */ + ssize_t (*write)(struct kernfs_open_file *of, + char *buf, size_t nbytes, loff_t off); +}; + +/** * struct rdt_resource - attributes of an RDT resource * @enabled: Is this feature enabled on this machine * @capable: Is this feature available on this machine |