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| author | Vikas Shivappa <vikas.shivappa@linux.intel.com> | 2017-04-08 03:33:53 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-14 17:10:08 +0300 |
| commit | 05b93417ce5b924c6652de19fdcc27439ab37c90 (patch) | |
| tree | 65e7768add4e6d2cc4a7a1ecc047c0fe9d05319b /arch/x86/include | |
| parent | ab66a33b032eb5b8186aeaf648127bce829c9efd (diff) | |
| download | linux-05b93417ce5b924c6652de19fdcc27439ab37c90.tar.xz | |
x86/intel_rdt/mba: Add primary support for Memory Bandwidth Allocation (MBA)
The MBA feature details like minimum bandwidth supported, bandwidth
granularity etc are obtained via executing CPUID with EAX=10H ,ECX=3.
Setup and initialize the MBA specific extensions to data structures like
global list of RDT resources, RDT resource structure and RDT domain
structure.
[ tglx: Split out the seperate structure and the CBM related parts ]
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: vikas.shivappa@intel.com
Link: http://lkml.kernel.org/r/1491611637-20417-5-git-send-email-vikas.shivappa@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/intel_rdt.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h index 6295594bd673..0620fc957e59 100644 --- a/arch/x86/include/asm/intel_rdt.h +++ b/arch/x86/include/asm/intel_rdt.h @@ -12,6 +12,7 @@ #define IA32_L3_QOS_CFG 0xc81 #define IA32_L3_CBM_BASE 0xc90 #define IA32_L2_CBM_BASE 0xd10 +#define IA32_MBA_THRTL_BASE 0xd50 #define L3_QOS_CDP_ENABLE 0x01ULL @@ -120,6 +121,23 @@ struct rdt_cache { }; /** + * struct rdt_membw - Memory bandwidth allocation related data + * @max_delay: Max throttle delay. Delay is the hardware + * representation for memory bandwidth. + * @min_bw: Minimum memory bandwidth percentage user can request + * @bw_gran: Granularity at which the memory bandwidth is allocated + * @delay_linear: True if memory B/W delay is in linear scale + * @mb_map: Mapping of memory B/W percentage to memory B/W delay + */ +struct rdt_membw { + u32 max_delay; + u32 min_bw; + u32 bw_gran; + u32 delay_linear; + u32 *mb_map; +}; + +/** * struct rdt_resource - attributes of an RDT resource * @enabled: Is this feature enabled on this machine * @capable: Is this feature available on this machine @@ -145,7 +163,10 @@ struct rdt_resource { struct rdt_resource *r); int data_width; struct list_head domains; - struct rdt_cache cache; + union { + struct rdt_cache cache; + struct rdt_membw membw; + }; }; extern struct mutex rdtgroup_mutex; @@ -161,6 +182,7 @@ enum { RDT_RESOURCE_L3DATA, RDT_RESOURCE_L3CODE, RDT_RESOURCE_L2, + RDT_RESOURCE_MBA, /* Must be the last */ RDT_NUM_RESOURCES, |