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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2015-08-10 22:34:33 +0200 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-08-20 13:24:26 +0200 |
| commit | 5f141548824cebbff2e838ff401c34e667797467 (patch) | |
| tree | 873166173fde6592bb01dbd90436ced58d8b7c06 /include/xen | |
| parent | xen: xensyms support (diff) | |
| download | linux-5f141548824cebbff2e838ff401c34e667797467.tar.xz linux-5f141548824cebbff2e838ff401c34e667797467.zip | |
xen/PMU: Sysfs interface for setting Xen PMU mode
Set Xen's PMU mode via /sys/hypervisor/pmu/pmu_mode. Add XENPMU hypercall.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/interface/xen.h | 1 | ||||
| -rw-r--r-- | include/xen/interface/xenpmu.h | 59 |
2 files changed, 60 insertions, 0 deletions
diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h index 8194270edcf0..e9d4501d1f5e 100644 --- a/include/xen/interface/xen.h +++ b/include/xen/interface/xen.h @@ -80,6 +80,7 @@ #define __HYPERVISOR_kexec_op 37 #define __HYPERVISOR_tmem_op 38 #define __HYPERVISOR_xc_reserved_op 39 /* reserved for XenClient */ +#define __HYPERVISOR_xenpmu_op 40 /* Architecture-specific hypercall definitions. */ #define __HYPERVISOR_arch_0 48 diff --git a/include/xen/interface/xenpmu.h b/include/xen/interface/xenpmu.h new file mode 100644 index 000000000000..eac1b498b89f --- /dev/null +++ b/include/xen/interface/xenpmu.h @@ -0,0 +1,59 @@ +#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__ */ |