include/xen/interface/xenpmu.h

#ifndef __XEN_PUBLIC_XENPMU_H__
#define __XEN_PUBLIC_XENPMU_H__

#include "xen.h"

#define XENPMU_VER_MAJ    0
#define XENPMU_VER_MIN    1

/*
 * ` enum neg_errnoval
 * ` HYPERVISOR_xenpmu_op(enum xenpmu_op cmd, struct xenpmu_params *args);
 *
 * @cmd  == XENPMU_* (PMU operation)
 * @args == struct xenpmu_params
 */
/* ` enum xenpmu_op { */
#define XENPMU_mode_get        0 /* Also used for getting PMU version */
#define XENPMU_mode_set        1
#define XENPMU_feature_get     2
#define XENPMU_feature_set     3
#define XENPMU_init            4
#define XENPMU_finish          5

/* ` } */

/* Parameters structure for HYPERVISOR_xenpmu_op call */
struct xen_pmu_params {
	/* IN/OUT parameters */
	struct {
		uint32_t maj;
		uint32_t min;
	} version;
	uint64_t val;

	/* IN parameters */
	uint32_t vcpu;
	uint32_t pad;
};

/* PMU modes:
 * - XENPMU_MODE_OFF:   No PMU virtualization
 * - XENPMU_MODE_SELF:  Guests can profile themselves
 * - XENPMU_MODE_HV:    Guests can profile themselves, dom0 profiles
 *                      itself and Xen
 * - XENPMU_MODE_ALL:   Only dom0 has access to VPMU and it profiles
 *                      everyone: itself, the hypervisor and the guests.
 */
#define XENPMU_MODE_OFF           0
#define XENPMU_MODE_SELF          (1<<0)
#define XENPMU_MODE_HV            (1<<1)
#define XENPMU_MODE_ALL           (1<<2)

/*
 * PMU features:
 * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD)
 */
#define XENPMU_FEATURE_INTEL_BTS  1

#endif /* __XEN_PUBLIC_XENPMU_H__ */