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[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / intel_rdt_common.h
1 #ifndef _ASM_X86_INTEL_RDT_COMMON_H
2 #define _ASM_X86_INTEL_RDT_COMMON_H
3
4 #define MSR_IA32_PQR_ASSOC 0x0c8f
5
6 /**
7 * struct intel_pqr_state - State cache for the PQR MSR
8 * @rmid: The cached Resource Monitoring ID
9 * @closid: The cached Class Of Service ID
10 * @rmid_usecnt: The usage counter for rmid
11 *
12 * The upper 32 bits of MSR_IA32_PQR_ASSOC contain closid and the
13 * lower 10 bits rmid. The update to MSR_IA32_PQR_ASSOC always
14 * contains both parts, so we need to cache them.
15 *
16 * The cache also helps to avoid pointless updates if the value does
17 * not change.
18 */
19 struct intel_pqr_state {
20 u32 rmid;
21 u32 closid;
22 int rmid_usecnt;
23 };
24
25 DECLARE_PER_CPU(struct intel_pqr_state, pqr_state);
26
27 #endif /* _ASM_X86_INTEL_RDT_COMMON_H */