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| author | David S. Miller <davem@davemloft.net> | 2012-08-17 05:35:41 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-19 08:03:53 +0200 |
| commit | 8c79bfa51101354853f0f5d3b02435cec429da51 (patch) | |
| tree | 412a66bd5885179b65a957956ad7978b6bada7f4 /arch/sparc/kernel/hvcalls.S | |
| parent | sparc64: Add detection for features new in SPARC-T4. (diff) | |
| download | linux-8c79bfa51101354853f0f5d3b02435cec429da51.tar.xz linux-8c79bfa51101354853f0f5d3b02435cec429da51.zip | |
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/hvcalls.S')
| -rw-r--r-- | arch/sparc/kernel/hvcalls.S | 16 |
1 files changed, 16 insertions, 0 deletions
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) |