diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-12 18:39:22 (GMT) |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-09-03 18:51:36 (GMT) |
| commit | 80f184108e364ba1d08dd77339966034c9a9243e (patch) | |
| tree | 5ec0337b5f0184e886d12392704289deeb6acd5b /arch/tile/include | |
| parent | 8157107b13099d6eb2e8ccd00b9aba009c698c38 (diff) | |
| download | linux-80f184108e364ba1d08dd77339966034c9a9243e.tar.xz | |
tile: support reporting Tilera hypervisor statistics
Newer hypervisors have an API for reporting per-cpu statistics
information. This change allows seeing that information via
/sys/devices/system/cpu/cpuN/hv_stats file for each core.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/include')
| -rw-r--r-- | arch/tile/include/hv/hypervisor.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/tile/include/hv/hypervisor.h b/arch/tile/include/hv/hypervisor.h index 0971ebb..dfcdeb6 100644 --- a/arch/tile/include/hv/hypervisor.h +++ b/arch/tile/include/hv/hypervisor.h @@ -544,14 +544,24 @@ typedef enum { HV_CONFSTR_CPUMOD_REV = 18, /** Human-readable CPU module description. */ - HV_CONFSTR_CPUMOD_DESC = 19 + HV_CONFSTR_CPUMOD_DESC = 19, + + /** Per-tile hypervisor statistics. When this identifier is specified, + * the hv_confstr call takes two extra arguments. The first is the + * HV_XY_TO_LOTAR of the target tile's coordinates. The second is + * a flag word. The only current flag is the lowest bit, which means + * "zero out the stats instead of retrieving them"; in this case the + * buffer and buffer length are ignored. */ + HV_CONFSTR_HV_STATS = 20 } HV_ConfstrQuery; /** Query a configuration string from the hypervisor. * * @param query Identifier for the specific string to be retrieved - * (HV_CONFSTR_xxx). + * (HV_CONFSTR_xxx). Some strings may require or permit extra + * arguments to be appended which select specific objects to be + * described; see the string descriptions above. * @param buf Buffer in which to place the string. * @param len Length of the buffer. * @return If query is valid, then the length of the corresponding string, @@ -559,7 +569,7 @@ typedef enum { * was truncated. If query is invalid, HV_EINVAL. If the specified * buffer is not writable by the client, HV_EFAULT. */ -int hv_confstr(HV_ConfstrQuery query, HV_VirtAddr buf, int len); +int hv_confstr(HV_ConfstrQuery query, HV_VirtAddr buf, int len, ...); /** Tile coordinate */ typedef struct |