From: "Fenghua Yu" <fenghua.yu@intel.com>
To: "Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@elte.hu>,
"H. Peter Anvin" <h.peter.anvin@intel.com>,
"Tony Luck" <tony.luck@intel.com>, "Tejun Heo" <tj@kernel.org>,
"Borislav Petkov" <bp@suse.de>,
"Stephane Eranian" <eranian@google.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
"David Carrillo-Cisneros" <davidcc@google.com>,
"Ravi V Shankar" <ravi.v.shankar@intel.com>,
"Vikas Shivappa" <vikas.shivappa@linux.intel.com>,
"Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>,
"x86" <x86@kernel.org>, "Fenghua Yu" <fenghua.yu@intel.com>
Subject: [PATCH 22/32] x86/intel_rdt_rdtgroup.h: Header for user interface
Date: Tue, 12 Jul 2016 18:02:55 -0700 [thread overview]
Message-ID: <1468371785-53231-23-git-send-email-fenghua.yu@intel.com> (raw)
In-Reply-To: <1468371785-53231-1-git-send-email-fenghua.yu@intel.com>
From: Fenghua Yu <fenghua.yu@intel.com>
This is header file for user interface file intel_rdt_rdtgroup.c.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
arch/x86/include/asm/intel_rdt_rdtgroup.h | 226 ++++++++++++++++++++++++++++++
1 file changed, 226 insertions(+)
create mode 100644 arch/x86/include/asm/intel_rdt_rdtgroup.h
diff --git a/arch/x86/include/asm/intel_rdt_rdtgroup.h b/arch/x86/include/asm/intel_rdt_rdtgroup.h
new file mode 100644
index 0000000..797fed3
--- /dev/null
+++ b/arch/x86/include/asm/intel_rdt_rdtgroup.h
@@ -0,0 +1,226 @@
+#ifndef _RDT_PGROUP_H
+#define _RDT_PGROUP_H
+#define MAX_RDTGROUP_TYPE_NAMELEN 32
+#define MAX_RDTGROUP_ROOT_NAMELEN 64
+#define MAX_RFTYPE_NAME 64
+
+#include <asm/intel_rdt.h>
+
+extern void rdtgroup_exit(struct task_struct *tsk);
+
+struct pss_set {
+ void *self;
+ /*
+ * Lists running through all tasks using this rdtgroup.
+ */
+ struct list_head tasks;
+
+ /* all css_task_iters currently walking this cset */
+ struct list_head task_iters;
+
+ /* Reference count */
+ atomic_t refcount;
+};
+
+/* cftype->flags */
+enum {
+ RFTYPE_WORLD_WRITABLE = (1 << 4),/* (DON'T USE FOR NEW FILES) S_IWUGO */
+
+ /* internal flags, do not use outside rdtgroup core proper */
+ __RFTYPE_ONLY_ON_DFL = (1 << 16),/* only on default hierarchy */
+ __RFTYPE_NOT_ON_DFL = (1 << 17),/* not on default hierarchy */
+};
+
+/* bits in struct rdtgroup flags field */
+enum {
+ /* rdtroup requires release notifications to userspace */
+ RDTGRP_NOTIFY_ON_RELEASE,
+ /*
+ * Clone the parent's configuration when creating a new child
+ * cpuset rdtgroup. For historical reasons, this option can be
+ * specified at mount time and thus is implemented here.
+ */
+ RDTGRP_CPUSET_CLONE_CHILDREN,
+};
+
+#define CACHE_LEVEL3 3
+
+struct cache_resource {
+ u64 *cbm;
+ u64 *cbm2;
+ int *closid;
+ int *refcnt;
+};
+
+struct rdt_resource {
+ bool valid;
+ int closid[MAX_CACHE_DOMAINS];
+ /* Add more resources here. */
+};
+
+struct rdtgroup {
+ unsigned long flags; /* "unsigned long" so bitops work */
+
+ /*
+ * idr allocated in-hierarchy ID.
+ *
+ * ID 0 is not used, the ID of the root rdtgroup is always 1, and a
+ * new rdtgroup will be assigned with a smallest available ID.
+ *
+ * Allocating/Removing ID must be protected by rdtgroup_mutex.
+ */
+ int id;
+
+ /*
+ * The depth this rdtgroup is at. The root is at depth zero and each
+ * step down the hierarchy increments the level. This along with
+ * ancestor_ids[] can determine whether a given rdtgroup is a
+ * descendant of another without traversing the hierarchy.
+ */
+ int level;
+
+ /*
+ * Each non-empty css_set associated with this rdtgroup contributes
+ * one to populated_cnt. All children with non-zero popuplated_cnt
+ * of their own contribute one. The count is zero iff there's no
+ * task in this rdtgroup or its subtree.
+ */
+ int populated_cnt;
+
+ struct kernfs_node *kn; /* rdtgroup kernfs entry */
+
+ struct rdtgroup_root *root;
+
+ struct list_head rdtgroup_list;
+
+ struct pss_set pset;
+ struct cpumask cpu_mask;
+ char schema[1024];
+
+ /* used to wait for offlining of csses */
+ wait_queue_head_t offline_waitq;
+
+ struct rdt_resource resource;
+
+ /* ids of the ancestors at each level including self */
+ int ancestor_ids[];
+};
+
+struct rftype {
+ /*
+ * By convention, the name should begin with the name of the
+ * subsystem, followed by a period. Zero length string indicates
+ * end of cftype array.
+ */
+ char name[MAX_CFTYPE_NAME];
+ unsigned long private;
+
+ /*
+ * The maximum length of string, excluding trailing nul, that can
+ * be passed to write. If < PAGE_SIZE-1, PAGE_SIZE-1 is assumed.
+ */
+ size_t max_write_len;
+
+ /* CFTYPE_* flags */
+ unsigned int flags;
+
+ /*
+ * If non-zero, should contain the offset from the start of css to
+ * a struct rdtgroup_file field. rdtgroup will record the handle of
+ * the created file into it. The recorded handle can be used as
+ * long as the containing css remains accessible.
+ */
+ unsigned int file_offset;
+
+ /*
+ * Fields used for internal bookkeeping. Initialized automatically
+ * during registration.
+ */
+ struct kernfs_ops *kf_ops;
+
+ /*
+ * read_u64() is a shortcut for the common case of returning a
+ * single integer. Use it in place of read()
+ */
+ u64 (*read_u64)(struct rftype *rft);
+ /*
+ * read_s64() is a signed version of read_u64()
+ */
+ s64 (*read_s64)(struct rftype *rft);
+
+ /* generic seq_file read interface */
+ int (*seq_show)(struct seq_file *sf, void *v);
+
+ /* optional ops, implement all or none */
+ void *(*seq_start)(struct seq_file *sf, loff_t *ppos);
+ void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos);
+ void (*seq_stop)(struct seq_file *sf, void *v);
+
+ /*
+ * write_u64() is a shortcut for the common case of accepting
+ * a single integer (as parsed by simple_strtoull) from
+ * userspace. Use in place of write(); return 0 or error.
+ */
+ int (*write_u64)(struct rftype *rft, u64 val);
+ /*
+ * write_s64() is a signed version of write_u64()
+ */
+ int (*write_s64)(struct rftype *rft, s64 val);
+
+ /*
+ * 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. Use
+ * of_css/cft() to access the associated css and cft.
+ */
+ ssize_t (*write)(struct kernfs_open_file *of,
+ char *buf, size_t nbytes, loff_t off);
+};
+
+struct rdtgroup_root {
+ struct kernfs_root *kf_root;
+
+ /* Unique id for this hierarchy. */
+ int hierarchy_id;
+
+ /* The root rdtgroup. Root is destroyed on its release. */
+ struct rdtgroup rdtgrp;
+
+ /* for rdtgrp->ancestor_ids[0] */
+ int rdtgrp_ancestor_id_storage;
+
+ /* Number of rdtgroups in the hierarchy */
+ atomic_t nr_rdtgrps;
+
+ /* A list running through the active hierarchies */
+ struct list_head root_list;
+
+ /* Hierarchy-specific flags */
+ unsigned int flags;
+
+ /* IDs for rdtgroups in this hierarchy */
+ struct idr rdtgroup_idr;
+
+ /* The name for this hierarchy - may be empty */
+ char name[MAX_RDTGROUP_ROOT_NAMELEN];
+};
+
+/* no synchronization, the result can only be used as a hint */
+static inline bool rdtgroup_is_populated(struct rdtgroup *rdtgrp)
+{
+ return rdtgrp->populated_cnt;
+}
+
+/* cft/css accessors for cftype->write() operation */
+static inline struct rftype *of_rft(struct kernfs_open_file *of)
+{
+ return of->kn->priv;
+}
+
+/* cft/css accessors for cftype->seq_*() operations */
+static inline struct rftype *seq_rft(struct seq_file *seq)
+{
+ return of_rft(seq->private);
+}
+
+#endif
--
2.5.0
next prev parent reply other threads:[~2016-07-12 22:03 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-13 1:02 [PATCH 00/32] Enable Intel Resource Allocation in Resource Director Technology Fenghua Yu
2016-07-13 1:02 ` [PATCH 01/32] x86/intel_rdt: Cache Allocation documentation Fenghua Yu
2016-07-13 1:02 ` [PATCH 02/32] x86/intel_rdt: Add support for Cache Allocation detection Fenghua Yu
2016-07-26 19:00 ` Nilay Vaish
2016-07-13 1:02 ` [PATCH 03/32] x86/intel_rdt: Add Class of service management Fenghua Yu
2016-07-13 1:02 ` [PATCH 04/32] x86/intel_rdt: Add L3 cache capacity bitmask management Fenghua Yu
2016-07-22 7:12 ` Marcelo Tosatti
2016-07-22 21:43 ` Luck, Tony
2016-07-23 4:31 ` Marcelo Tosatti
2016-07-26 3:18 ` Luck, Tony
2016-07-26 17:10 ` Shivappa Vikas
2016-07-13 1:02 ` [PATCH 05/32] x86/intel_rdt: Implement scheduling support for Intel RDT Fenghua Yu
2016-07-25 16:25 ` Nilay Vaish
2016-07-25 16:31 ` Nilay Vaish
2016-07-25 18:05 ` Luck, Tony
2016-07-25 22:47 ` David Carrillo-Cisneros
2016-07-13 1:02 ` [PATCH 06/32] x86/intel_rdt: Hot cpu support for Cache Allocation Fenghua Yu
2016-07-13 9:19 ` Thomas Gleixner
2016-07-21 19:46 ` Shivappa Vikas
2016-07-14 0:40 ` David Carrillo-Cisneros
2016-07-14 22:58 ` Yu, Fenghua
2016-07-13 1:02 ` [PATCH 07/32] x86/intel_rdt: Intel haswell Cache Allocation enumeration Fenghua Yu
2016-07-13 1:02 ` [PATCH 08/32] Define CONFIG_INTEL_RDT Fenghua Yu
2016-07-13 10:25 ` Thomas Gleixner
2016-07-13 18:05 ` Yu, Fenghua
2016-07-13 21:09 ` Thomas Gleixner
2016-07-13 21:18 ` Yu, Fenghua
2016-07-13 1:02 ` [PATCH 09/32] x86/intel_rdt: Intel Code Data Prioritization detection Fenghua Yu
2016-07-13 1:02 ` [PATCH 10/32] x86/intel_rdt: Adds support to enable Code Data Prioritization Fenghua Yu
2016-07-26 19:23 ` Nilay Vaish
2016-07-26 20:32 ` Shivappa Vikas
2016-07-13 1:02 ` [PATCH 11/32] x86/intel_rdt: Class of service and capacity bitmask management for CDP Fenghua Yu
2016-07-13 1:02 ` [PATCH 12/32] x86/intel_rdt: Hot cpu update for code data prioritization Fenghua Yu
2016-07-13 1:02 ` [PATCH 13/32] Documentation, x86: Documentation for Intel resource allocation user interface Fenghua Yu
2016-07-13 12:47 ` Thomas Gleixner
2016-07-13 17:13 ` Luck, Tony
2016-07-14 6:53 ` Thomas Gleixner
2016-07-14 17:16 ` Luck, Tony
2016-07-19 12:32 ` Thomas Gleixner
2016-08-04 23:38 ` Yu, Fenghua
2016-07-27 16:20 ` Nilay Vaish
2016-07-27 16:57 ` Luck, Tony
2016-08-03 22:15 ` Marcelo Tosatti
2016-07-13 1:02 ` [PATCH 14/32] x86/cpufeatures: Get max closid and max cbm len and clean feature comments and code Fenghua Yu
2016-07-27 16:49 ` Nilay Vaish
2016-07-13 1:02 ` [PATCH 15/32] cacheinfo: Introduce cache id Fenghua Yu
2016-07-27 17:04 ` Nilay Vaish
2016-07-13 1:02 ` [PATCH 16/32] Documentation, ABI: Add a document entry for " Fenghua Yu
2016-07-13 1:02 ` [PATCH 17/32] x86, intel_cacheinfo: Enable cache id in x86 Fenghua Yu
2016-07-28 5:41 ` Nilay Vaish
2016-07-13 1:02 ` [PATCH 18/32] drivers/base/cacheinfo.c: Export some cacheinfo functions for others to use Fenghua Yu
2016-07-13 1:02 ` [PATCH 19/32] sched.h: Add rg_list and rdtgroup in task_struct Fenghua Yu
2016-07-13 12:56 ` Thomas Gleixner
2016-07-13 17:50 ` Yu, Fenghua
2016-07-28 5:53 ` Nilay Vaish
2016-07-13 1:02 ` [PATCH 20/32] magic number for rscctrl file system Fenghua Yu
2016-07-28 5:57 ` Nilay Vaish
2016-07-13 1:02 ` [PATCH 21/32] x86/intel_rdt.h: Header for inter_rdt.c Fenghua Yu
2016-07-28 14:07 ` Nilay Vaish
2016-07-13 1:02 ` Fenghua Yu [this message]
2016-07-13 1:02 ` [PATCH 23/32] x86/intel_rdt.c: Extend RDT to per cache and per resources Fenghua Yu
2016-07-13 13:07 ` Thomas Gleixner
2016-07-13 17:40 ` Yu, Fenghua
2016-07-13 1:02 ` [PATCH 24/32] Task fork and exit for rdtgroup Fenghua Yu
2016-07-13 13:14 ` Thomas Gleixner
2016-07-13 17:32 ` Yu, Fenghua
2016-07-13 21:02 ` Thomas Gleixner
2016-07-13 21:22 ` Yu, Fenghua
2016-07-13 1:02 ` [PATCH 25/32] x86/intel_rdt_rdtgroup.c: User interface for RDT Fenghua Yu
2016-07-14 12:30 ` Thomas Gleixner
2016-07-13 1:02 ` [PATCH 26/32] x86/intel_rdt_rdtgroup.c: Create info directory Fenghua Yu
2016-07-13 1:03 ` [PATCH 27/32] x86/intel_rdt_rdtgroup.c: Implement rscctrl file system commands Fenghua Yu
2016-07-13 1:03 ` [PATCH 28/32] x86/intel_rdt_rdtgroup.c: Read and write cpus Fenghua Yu
2016-07-13 1:03 ` [PATCH 29/32] x86/intel_rdt_rdtgroup.c: Tasks iterator and write Fenghua Yu
2016-07-13 1:03 ` [PATCH 30/32] x86/intel_rdt_rdtgroup.c: Process schemas input from rscctrl interface Fenghua Yu
2016-07-14 0:41 ` David Carrillo-Cisneros
2016-07-14 6:11 ` Thomas Gleixner
2016-07-14 6:16 ` Yu, Fenghua
2016-07-14 6:32 ` Yu, Fenghua
2016-07-13 1:03 ` [PATCH 31/32] MAINTAINERS: Add maintainer for Intel RDT resource allocation Fenghua Yu
2016-07-13 1:03 ` [PATCH 32/32] x86/Makefile: Build intel_rdt_rdtgroup.c Fenghua Yu
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