sparc64: Add performance counter hypervisor calls for sun4v.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/hypervisor.h

@@ -2713,6 +2713,30 @@ extern unsigned long sun4v_ldc_revoke(unsigned long channel,
  */
 #define HV_FAST_SET_PERFREG		0x101
 
+#define HV_N2_PERF_SPARC_CTL		0x0
+#define HV_N2_PERF_DRAM_CTL0		0x1
+#define HV_N2_PERF_DRAM_CNT0		0x2
+#define HV_N2_PERF_DRAM_CTL1		0x3
+#define HV_N2_PERF_DRAM_CNT1		0x4
+#define HV_N2_PERF_DRAM_CTL2		0x5
+#define HV_N2_PERF_DRAM_CNT2		0x6
+#define HV_N2_PERF_DRAM_CTL3		0x7
+#define HV_N2_PERF_DRAM_CNT3		0x8
+
+#define HV_FAST_N2_GET_PERFREG		0x104
+#define HV_FAST_N2_SET_PERFREG		0x105
+
+#ifndef __ASSEMBLY__
+extern unsigned long sun4v_niagara_getperf(unsigned long reg,
+					   unsigned long *val);
+extern unsigned long sun4v_niagara_setperf(unsigned long reg,
+					   unsigned long val);
+extern unsigned long sun4v_niagara2_getperf(unsigned long reg,
+					    unsigned long *val);
+extern unsigned long sun4v_niagara2_setperf(unsigned long reg,
+					    unsigned long val);
+#endif
+
 /* MMU statistics services.
  *
  * The hypervisor maintains MMU statistics and privileged code provides

arch/sparc64/kernel/hvcalls.S

@@ -766,3 +766,35 @@ ENTRY(sun4v_mmu_demap_all)
 	retl
 	 nop
 ENDPROC(sun4v_mmu_demap_all)
+
+ENTRY(sun4v_niagara_getperf)
+	mov	%o0, %o4
+	mov	HV_FAST_GET_PERFREG, %o5
+	ta	HV_FAST_TRAP
+	stx	%o1, [%o4]
+	retl
+	 nop
+ENDPROC(sun4v_niagara_getperf)
+
+ENTRY(sun4v_niagara_setperf)
+	mov	HV_FAST_SET_PERFREG, %o5
+	ta	HV_FAST_TRAP
+	retl
+	 nop
+ENDPROC(sun4v_niagara_setperf)
+
+ENTRY(sun4v_niagara2_getperf)
+	mov	%o0, %o4
+	mov	HV_FAST_N2_GET_PERFREG, %o5
+	ta	HV_FAST_TRAP
+	stx	%o1, [%o4]
+	retl
+	 nop
+ENDPROC(sun4v_niagara2_getperf)
+
+ENTRY(sun4v_niagara2_setperf)
+	mov	HV_FAST_N2_SET_PERFREG, %o5
+	ta	HV_FAST_TRAP
+	retl
+	 nop
+ENDPROC(sun4v_niagara2_setperf)

arch/sparc64/kernel/sparc64_ksyms.c

@@ -49,6 +49,7 @@
 #include <asm/timer.h>
 #include <asm/cpudata.h>
 #include <asm/ftrace.h>
+#include <asm/hypervisor.h>
 
 struct poll {
 	int fd;
@@ -148,6 +149,11 @@ EXPORT_SYMBOL(flush_dcache_page);
 EXPORT_SYMBOL(__flush_dcache_range);
 #endif
 
+EXPORT_SYMBOL(sun4v_niagara_getperf);
+EXPORT_SYMBOL(sun4v_niagara_setperf);
+EXPORT_SYMBOL(sun4v_niagara2_getperf);
+EXPORT_SYMBOL(sun4v_niagara2_setperf);
+
 #ifdef CONFIG_SUN_AUXIO
 EXPORT_SYMBOL(auxio_set_led);
 EXPORT_SYMBOL(auxio_set_lte);