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x86/intel_rdt: Add schemata file

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Last of the per resource group files. Also mode 0644. This one shows
the resources available to the group. Syntax depends on whether the
"cdp" mount option was given. With code/data prioritization disabled
it is simply a list of masks for each cache domain. Initial value
allows access to all of the L3 cache on all domains. E.g. on a 2 socket
Broadwell:
        L3:0=fffff;1=fffff
With CDP enabled, separate masks for data and instructions are provided:
        L3DATA:0=fffff;1=fffff
        L3CODE:0=fffff;1=fffff

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Ravi V Shankar" <ravi.v.shankar@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/1477692289-37412-9-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Tony Luck
2016-10-28 15:04:47 -07:00
committed by Thomas Gleixner
parent e02737d5b8
commit 60ec2440c6
4 changed files with 259 additions and 1 deletions
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6
arch/x86/include/asm/intel_rdt.h
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@@ -73,6 +73,7 @@ struct rftype {
* @num_domains: Number of domains active
* @msr_base: Base MSR address for CBMs
* @tmp_cbms: Scratch space when updating schemata
* @num_tmp_cbms: Number of CBMs in tmp_cbms
* @cache_level: Which cache level defines scope of this domain
* @cbm_idx_multi: Multiplier of CBM index
* @cbm_idx_offset: Offset of CBM index. CBM index is computed by:
@@ -90,6 +91,7 @@ struct rdt_resource {
int num_domains;
int msr_base;
u32 *tmp_cbms;
int num_tmp_cbms;
int cache_level;
int cbm_idx_multi;
int cbm_idx_offset;
@@ -170,4 +172,8 @@ DECLARE_PER_CPU_READ_MOSTLY(int, cpu_closid);
void rdt_cbm_update(void *arg);
struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn);
void rdtgroup_kn_unlock(struct kernfs_node *kn);
ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
char *buf, size_t nbytes, loff_t off);
int rdtgroup_schemata_show(struct kernfs_open_file *of,
struct seq_file *s, void *v);
#endif /* _ASM_X86_INTEL_RDT_H */