1 /* SPDX-License-Identifier: MIT */ 2 #ifndef __XEN_PUBLIC_XENPMU_H__ 3 #define __XEN_PUBLIC_XENPMU_H__ 4 5 #include "xen.h" 6 7 #define XENPMU_VER_MAJ 0 8 #define XENPMU_VER_MIN 1 9 10 /* 11 * ` enum neg_errnoval 12 * ` HYPERVISOR_xenpmu_op(enum xenpmu_op cmd, struct xenpmu_params *args); 13 * 14 * @cmd == XENPMU_* (PMU operation) 15 * @args == struct xenpmu_params 16 */ 17 /* ` enum xenpmu_op { */ 18 #define XENPMU_mode_get 0 /* Also used for getting PMU version */ 19 #define XENPMU_mode_set 1 20 #define XENPMU_feature_get 2 21 #define XENPMU_feature_set 3 22 #define XENPMU_init 4 23 #define XENPMU_finish 5 24 #define XENPMU_lvtpc_set 6 25 #define XENPMU_flush 7 26 27 /* ` } */ 28 29 /* Parameters structure for HYPERVISOR_xenpmu_op call */ 30 struct xen_pmu_params { 31 /* IN/OUT parameters */ 32 struct { 33 uint32_t maj; 34 uint32_t min; 35 } version; 36 uint64_t val; 37 38 /* IN parameters */ 39 uint32_t vcpu; 40 uint32_t pad; 41 }; 42 43 /* PMU modes: 44 * - XENPMU_MODE_OFF: No PMU virtualization 45 * - XENPMU_MODE_SELF: Guests can profile themselves 46 * - XENPMU_MODE_HV: Guests can profile themselves, dom0 profiles 47 * itself and Xen 48 * - XENPMU_MODE_ALL: Only dom0 has access to VPMU and it profiles 49 * everyone: itself, the hypervisor and the guests. 50 */ 51 #define XENPMU_MODE_OFF 0 52 #define XENPMU_MODE_SELF (1<<0) 53 #define XENPMU_MODE_HV (1<<1) 54 #define XENPMU_MODE_ALL (1<<2) 55 56 /* 57 * PMU features: 58 * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD) 59 */ 60 #define XENPMU_FEATURE_INTEL_BTS 1 61 62 /* 63 * Shared PMU data between hypervisor and PV(H) domains. 64 * 65 * The hypervisor fills out this structure during PMU interrupt and sends an 66 * interrupt to appropriate VCPU. 67 * Architecture-independent fields of xen_pmu_data are WO for the hypervisor 68 * and RO for the guest but some fields in xen_pmu_arch can be writable 69 * by both the hypervisor and the guest (see arch-$arch/pmu.h). 70 */ 71 struct xen_pmu_data { 72 /* Interrupted VCPU */ 73 uint32_t vcpu_id; 74 75 /* 76 * Physical processor on which the interrupt occurred. On non-privileged 77 * guests set to vcpu_id; 78 */ 79 uint32_t pcpu_id; 80 81 /* 82 * Domain that was interrupted. On non-privileged guests set to 83 * DOMID_SELF. 84 * On privileged guests can be DOMID_SELF, DOMID_XEN, or, when in 85 * XENPMU_MODE_ALL mode, domain ID of another domain. 86 */ 87 domid_t domain_id; 88 89 uint8_t pad[6]; 90 91 /* Architecture-specific information */ 92 struct xen_pmu_arch pmu; 93 }; 94 95 #endif /* __XEN_PUBLIC_XENPMU_H__ */ 96