sparc64: T5 PMU

The T5 (niagara5) has different PCR related HV fast trap values and a new
HV API Group. This patch utilizes these and shares when possible with niagara4.

We use the same sparc_pmu niagara4_pmu. Should there be new effort to
obtain the MCU perf statistics then this would have to be changed.

Cc: sparclinux@vger.kernel.org
Signed-off-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/sparc/include/asm/hypervisor.h b/arch/sparc/include/asm/hypervisor.h
index ca121f0..17be9d6 100644 (file)
--- a/arch/sparc/include/asm/hypervisor.h
+++ b/arch/sparc/include/asm/hypervisor.h
@@ -2944,6 +2944,16 @@ extern unsigned long sun4v_vt_set_perfreg(unsigned long reg_num,
                                          unsigned long reg_val);
 #endif
 
+#define        HV_FAST_T5_GET_PERFREG          0x1a8
+#define        HV_FAST_T5_SET_PERFREG          0x1a9
+
+#ifndef        __ASSEMBLY__
+unsigned long sun4v_t5_get_perfreg(unsigned long reg_num,
+                                  unsigned long *reg_val);
+unsigned long sun4v_t5_set_perfreg(unsigned long reg_num,
+                                  unsigned long reg_val);
+#endif
+
 /* Function numbers for HV_CORE_TRAP.  */
 #define HV_CORE_SET_VER                        0x00
 #define HV_CORE_PUTCHAR                        0x01
@@ -2975,6 +2985,7 @@ extern unsigned long sun4v_vt_set_perfreg(unsigned long reg_num,
 #define HV_GRP_VF_CPU                  0x0205
 #define HV_GRP_KT_CPU                  0x0209
 #define HV_GRP_VT_CPU                  0x020c
+#define HV_GRP_T5_CPU                  0x0211
 #define HV_GRP_DIAG                    0x0300
 
 #ifndef __ASSEMBLY__

diff --git a/arch/sparc/kernel/hvapi.c b/arch/sparc/kernel/hvapi.c
index c0a2de0..5c55145 100644 (file)
--- a/arch/sparc/kernel/hvapi.c
+++ b/arch/sparc/kernel/hvapi.c
@@ -46,6 +46,7 @@ static struct api_info api_table[] = {
        { .group = HV_GRP_VF_CPU,                               },
        { .group = HV_GRP_KT_CPU,                               },
        { .group = HV_GRP_VT_CPU,                               },
+       { .group = HV_GRP_T5_CPU,                               },
        { .group = HV_GRP_DIAG,         .flags = FLAG_PRE_API   },
 };
 

diff --git a/arch/sparc/kernel/hvcalls.S b/arch/sparc/kernel/hvcalls.S
index f3ab509..caedf83 100644 (file)
--- a/arch/sparc/kernel/hvcalls.S
+++ b/arch/sparc/kernel/hvcalls.S
@@ -821,3 +821,19 @@ ENTRY(sun4v_vt_set_perfreg)
        retl
         nop
 ENDPROC(sun4v_vt_set_perfreg)
+
+ENTRY(sun4v_t5_get_perfreg)
+       mov     %o1, %o4
+       mov     HV_FAST_T5_GET_PERFREG, %o5
+       ta      HV_FAST_TRAP
+       stx     %o1, [%o4]
+       retl
+        nop
+ENDPROC(sun4v_t5_get_perfreg)
+
+ENTRY(sun4v_t5_set_perfreg)
+       mov     HV_FAST_T5_SET_PERFREG, %o5
+       ta      HV_FAST_TRAP
+       retl
+        nop
+ENDPROC(sun4v_t5_set_perfreg)

diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index 269af58..7e967c8 100644 (file)
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -191,12 +191,41 @@ static const struct pcr_ops n4_pcr_ops = {
        .pcr_nmi_disable        = PCR_N4_PICNPT,
 };
 
+static u64 n5_pcr_read(unsigned long reg_num)
+{
+       unsigned long val;
+
+       (void) sun4v_t5_get_perfreg(reg_num, &val);
+
+       return val;
+}
+
+static void n5_pcr_write(unsigned long reg_num, u64 val)
+{
+       (void) sun4v_t5_set_perfreg(reg_num, val);
+}
+
+static const struct pcr_ops n5_pcr_ops = {
+       .read_pcr               = n5_pcr_read,
+       .write_pcr              = n5_pcr_write,
+       .read_pic               = n4_pic_read,
+       .write_pic              = n4_pic_write,
+       .nmi_picl_value         = n4_picl_value,
+       .pcr_nmi_enable         = (PCR_N4_PICNPT | PCR_N4_STRACE |
+                                  PCR_N4_UTRACE | PCR_N4_TOE |
+                                  (26 << PCR_N4_SL_SHIFT)),
+       .pcr_nmi_disable        = PCR_N4_PICNPT,
+};
+
+
 static unsigned long perf_hsvc_group;
 static unsigned long perf_hsvc_major;
 static unsigned long perf_hsvc_minor;
 
 static int __init register_perf_hsvc(void)
 {
+       unsigned long hverror;
+
        if (tlb_type == hypervisor) {
                switch (sun4v_chip_type) {
                case SUN4V_CHIP_NIAGARA1:
@@ -215,6 +244,10 @@ static int __init register_perf_hsvc(void)
                        perf_hsvc_group = HV_GRP_VT_CPU;
                        break;
 
+               case SUN4V_CHIP_NIAGARA5:
+                       perf_hsvc_group = HV_GRP_T5_CPU;
+                       break;
+
                default:
                        return -ENODEV;
                }
@@ -222,10 +255,12 @@ static int __init register_perf_hsvc(void)
 
                perf_hsvc_major = 1;
                perf_hsvc_minor = 0;
-               if (sun4v_hvapi_register(perf_hsvc_group,
-                                        perf_hsvc_major,
-                                        &perf_hsvc_minor)) {
-                       printk("perfmon: Could not register hvapi.\n");
+               hverror = sun4v_hvapi_register(perf_hsvc_group,
+                                              perf_hsvc_major,
+                                              &perf_hsvc_minor);
+               if (hverror) {
+                       pr_err("perfmon: Could not register hvapi(0x%lx).\n",
+                              hverror);
                        return -ENODEV;
                }
        }
@@ -254,6 +289,10 @@ static int __init setup_sun4v_pcr_ops(void)
                pcr_ops = &n4_pcr_ops;
                break;
 
+       case SUN4V_CHIP_NIAGARA5:
+               pcr_ops = &n5_pcr_ops;
+               break;
+
        default:
                ret = -ENODEV;
                break;

diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 857baca..617b9fe 100644 (file)
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1662,7 +1662,8 @@ static bool __init supported_pmu(void)
                sparc_pmu = &niagara2_pmu;
                return true;
        }
-       if (!strcmp(sparc_pmu_type, "niagara4")) {
+       if (!strcmp(sparc_pmu_type, "niagara4") ||
+           !strcmp(sparc_pmu_type, "niagara5")) {
                sparc_pmu = &niagara4_pmu;
                return true;
        }