diff options
| author | David S. Miller <davem@davemloft.net> | 2012-08-16 20:35:41 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-18 23:03:53 -0700 |
| commit | 8c79bfa51101354853f0f5d3b02435cec429da51 (patch) | |
| tree | 412a66bd5885179b65a957956ad7978b6bada7f4 /arch/sparc/kernel | |
| parent | 6f859c0e96f0737a543610a189d12420c569110f (diff) | |
sparc64: Add hypervisor interfaces for SPARC-T4 perf counter access.
Unlike for previous chips, access to the perf-counter control
registers are all hyper-privileged. Therefore, access to them must go
through a hypervisor interface.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel')
| -rw-r--r-- | arch/sparc/kernel/hvapi.c | 1 | ||||
| -rw-r--r-- | arch/sparc/kernel/hvcalls.S | 16 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/sparc/kernel/hvapi.c b/arch/sparc/kernel/hvapi.c index 8593672838fd..1032df43ec95 100644 --- a/arch/sparc/kernel/hvapi.c +++ b/arch/sparc/kernel/hvapi.c @@ -45,6 +45,7 @@ static struct api_info api_table[] = { { .group = HV_GRP_NIU, }, { .group = HV_GRP_VF_CPU, }, { .group = HV_GRP_KT_CPU, }, + { .group = HV_GRP_VT_CPU, }, { .group = HV_GRP_DIAG, .flags = FLAG_PRE_API }, }; diff --git a/arch/sparc/kernel/hvcalls.S b/arch/sparc/kernel/hvcalls.S index 58d60de4d65b..f3ab509b76a8 100644 --- a/arch/sparc/kernel/hvcalls.S +++ b/arch/sparc/kernel/hvcalls.S @@ -805,3 +805,19 @@ ENTRY(sun4v_reboot_data_set) retl nop ENDPROC(sun4v_reboot_data_set) + +ENTRY(sun4v_vt_get_perfreg) + mov %o1, %o4 + mov HV_FAST_VT_GET_PERFREG, %o5 + ta HV_FAST_TRAP + stx %o1, [%o4] + retl + nop +ENDPROC(sun4v_vt_get_perfreg) + +ENTRY(sun4v_vt_set_perfreg) + mov HV_FAST_VT_SET_PERFREG, %o5 + ta HV_FAST_TRAP + retl + nop +ENDPROC(sun4v_vt_set_perfreg) |