linux-kernel - [PATCH 21/32] x86/intel_rdt.h: Header for inter

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Date:	Tue, 12 Jul 2016 18:02:54 -0700
From:	"Fenghua Yu" <fenghua.yu@...el.com>
To:	"Thomas Gleixner" <tglx@...utronix.de>,
	"Ingo Molnar" <mingo@...e.hu>,
	"H. Peter Anvin" <h.peter.anvin@...el.com>,
	"Tony Luck" <tony.luck@...el.com>, "Tejun Heo" <tj@...nel.org>,
	"Borislav Petkov" <bp@...e.de>,
	"Stephane Eranian" <eranian@...gle.com>,
	"Peter Zijlstra" <peterz@...radead.org>,
	"Marcelo Tosatti" <mtosatti@...hat.com>,
	"David Carrillo-Cisneros" <davidcc@...gle.com>,
	"Ravi V Shankar" <ravi.v.shankar@...el.com>,
	"Vikas Shivappa" <vikas.shivappa@...ux.intel.com>,
	"Sai Prakhya" <sai.praneeth.prakhya@...el.com>
Cc:	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"x86" <x86@...nel.org>, "Fenghua Yu" <fenghua.yu@...el.com>
Subject: [PATCH 21/32] x86/intel_rdt.h: Header for inter_rdt.c

From: Fenghua Yu <fenghua.yu@...el.com>

The header mainly provides functions to call from the user interface
file intel_rdt_rdtgroup.c.

Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
---
 arch/x86/include/asm/intel_rdt.h | 87 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 81 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h
index f2cb91d..4c5e0ac 100644
--- a/arch/x86/include/asm/intel_rdt.h
+++ b/arch/x86/include/asm/intel_rdt.h
@@ -3,27 +3,99 @@
 
 #ifdef CONFIG_INTEL_RDT
 
+#include <linux/seq_file.h>
 #include <linux/jump_label.h>
 
-#define MAX_CBM_LENGTH			32
 #define IA32_L3_CBM_BASE		0xc90
-#define CBM_FROM_INDEX(x)		(IA32_L3_CBM_BASE + x)
-#define MSR_IA32_PQOS_CFG		0xc81
+#define L3_CBM_FROM_INDEX(x)		(IA32_L3_CBM_BASE + x)
+
+#define MSR_IA32_L3_QOS_CFG		0xc81
+
+enum resource_type {
+	RESOURCE_L3  = 0,
+	RESOURCE_NUM = 1,
+};
+
+#define MAX_CACHE_LEAVES        4
+#define MAX_CACHE_DOMAINS       64
+
+DECLARE_PER_CPU_READ_MOSTLY(int, cpu_l3_domain);
+DECLARE_PER_CPU_READ_MOSTLY(struct rdtgroup *, cpu_rdtgroup);
 
 extern struct static_key rdt_enable_key;
 void __intel_rdt_sched_in(void *dummy);
+extern bool use_rdtgroup_tasks;
+
+extern bool cdp_enabled;
+
+struct rdt_opts {
+	bool cdp_enabled;
+	bool verbose;
+	bool simulate_cat_l3;
+};
+
+struct cache_domain {
+	cpumask_t shared_cpu_map[MAX_CACHE_DOMAINS];
+	unsigned int max_cache_domains_num;
+	unsigned int level;
+	unsigned int shared_cache_id[MAX_CACHE_DOMAINS];
+};
+
+extern struct rdt_opts rdt_opts;
 
 struct clos_cbm_table {
-	unsigned long l3_cbm;
+	unsigned long cbm;
 	unsigned int clos_refcnt;
 };
 
 struct clos_config {
-	unsigned long *closmap;
+	unsigned long **closmap;
 	u32 max_closid;
-	u32 closids_used;
 };
 
+struct shared_domain {
+	struct cpumask cpumask;
+	int l3_domain;
+};
+
+#define for_each_cache_domain(domain, start_domain, max_domain)	\
+	for (domain = start_domain; domain < max_domain; domain++)
+
+extern struct clos_config cconfig;
+extern struct shared_domain *shared_domain;
+extern int shared_domain_num;
+
+extern struct rdtgroup *root_rdtgrp;
+extern void rdtgroup_fork(struct task_struct *child);
+extern void rdtgroup_post_fork(struct task_struct *child);
+
+extern struct clos_cbm_table **l3_cctable;
+
+extern unsigned int min_bitmask_len;
+extern void msr_cpu_update(void *arg);
+extern inline void closid_get(u32 closid, int domain);
+extern void closid_put(u32 closid, int domain);
+extern void closid_free(u32 closid, int domain, int level);
+extern int closid_alloc(u32 *closid, int domain);
+extern bool cat_l3_enabled;
+extern unsigned int get_domain_num(int level);
+extern struct shared_domain *shared_domain;
+extern int shared_domain_num;
+extern inline int get_dcbm_table_index(int x);
+extern inline int get_icbm_table_index(int x);
+
+extern int get_cache_leaf(int level, int cpu);
+
+extern void cbm_update_l3_msr(void *pindex);
+extern int level_to_leaf(int level);
+
+extern void init_msrs(bool cdpenabled);
+extern bool cat_enabled(int level);
+extern u64 max_cbm(int level);
+extern u32 max_cbm_len(int level);
+
+extern void rdtgroup_exit(struct task_struct *tsk);
+
 /*
  * intel_rdt_sched_in() - Writes the task's CLOSid to IA32_PQR_MSR
  *
@@ -54,6 +126,9 @@ static inline void intel_rdt_sched_in(void)
 #else
 
 static inline void intel_rdt_sched_in(void) {}
+static inline void rdtgroup_fork(struct task_struct *child) {}
+static inline void rdtgroup_post_fork(struct task_struct *child) {}
+static inline void rdtgroup_exit(struct task_struct *tsk) {}
 
 #endif
 #endif
-- 
2.5.0