diff options
| author | Reinette Chatre <reinette.chatre@intel.com> | 2018-06-22 15:42:27 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-06-24 15:35:48 +0200 |
| commit | 746e08590b864cf730d7bd23394e2d3fbb0f22b6 (patch) | |
| tree | 082202481a7fdd26b6f9724345cbfb1538332437 /arch/x86/kernel/cpu/intel_rdt.h | |
| parent | 443810fe6160542c78e24c66047edd7a3cc830c6 (diff) | |
| download | linux-746e08590b864cf730d7bd23394e2d3fbb0f22b6.tar.gz linux-746e08590b864cf730d7bd23394e2d3fbb0f22b6.tar.bz2 linux-746e08590b864cf730d7bd23394e2d3fbb0f22b6.zip | |
x86/intel_rdt: Create character device exposing pseudo-locked region
After a pseudo-locked region is created it needs to be made
available to user space for usage.
A character device supporting mmap() is created for each pseudo-locked
region. A user space application can now use mmap() system call to map
pseudo-locked region into its virtual address space.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Cc: vikas.shivappa@linux.intel.com
Cc: gavin.hindman@intel.com
Cc: jithu.joseph@intel.com
Cc: dave.hansen@intel.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/fccbb9b20f07655ab0a4df9fa1c1babc0288aea0.1529706536.git.reinette.chatre@intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt.h')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt.h | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h index 8a7102cfbec7..b8e490a43290 100644 --- a/arch/x86/kernel/cpu/intel_rdt.h +++ b/arch/x86/kernel/cpu/intel_rdt.h @@ -138,6 +138,8 @@ struct mongroup { * @line_size: size of the cache lines * @size: size of pseudo-locked region in bytes * @kmem: the kernel memory associated with pseudo-locked region + * @minor: minor number of character device associated with this + * region * @debugfs_dir: pointer to this region's directory in the debugfs * filesystem */ @@ -151,6 +153,7 @@ struct pseudo_lock_region { unsigned int line_size; unsigned int size; void *kmem; + unsigned int minor; struct dentry *debugfs_dir; }; @@ -524,6 +527,8 @@ int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp); int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp); bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, u32 _cbm); bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d); +int rdt_pseudo_lock_init(void); +void rdt_pseudo_lock_release(void); int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp); void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp); struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r); @@ -551,13 +556,4 @@ void cqm_handle_limbo(struct work_struct *work); bool has_busy_rmid(struct rdt_resource *r, struct rdt_domain *d); void __check_limbo(struct rdt_domain *d, bool force_free); -/* - * Define the hooks for Cache Pseudo-Locking to use within rdt_mount(). - * These are no-ops provided for the new kernfs changes to use as a - * baseline in preparation for a conflict-free merge between it - * (kernfs changes) and the Cache Pseudo-Locking enabling. - */ -static inline int rdt_pseudo_lock_init(void) { return 0; } -static inline void rdt_pseudo_lock_release(void) { } - #endif /* _ASM_X86_INTEL_RDT_H */ |