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x86/intel_rdt: Add "info" files to resctrl file system

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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>
This commit is contained in:
Fenghua Yu
2016-10-28 15:04:43 -07:00
committed by Thomas Gleixner
parent 5ff193fbde
commit 4e978d06de
2 changed files with 209 additions and 0 deletions
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24
arch/x86/include/asm/intel_rdt.h
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@@ -26,6 +26,30 @@ 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