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authorbob picco <bpicco@meloft.net>2014-09-16 10:09:06 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-10-30 09:40:20 -0700
commita06148024dc3cac17fcfd31aa856d833282eb484 (patch)
tree6dd8de171c9c95eabe2e1bd0742f521dace84a0c
parent14f0211d3443d7a86c10bccba5013cd62f7bffd4 (diff)
downloadlinux-linaro-stable-a06148024dc3cac17fcfd31aa856d833282eb484.tar.gz
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>
-rw-r--r--arch/sparc/include/asm/hypervisor.h11
-rw-r--r--arch/sparc/kernel/hvapi.c1
-rw-r--r--arch/sparc/kernel/hvcalls.S16
-rw-r--r--arch/sparc/kernel/pcr.c47
-rw-r--r--arch/sparc/kernel/perf_event.c3
5 files changed, 73 insertions, 5 deletions
diff --git a/arch/sparc/include/asm/hypervisor.h b/arch/sparc/include/asm/hypervisor.h
index 94b39caea3eb..4f6725ff4c33 100644
--- a/arch/sparc/include/asm/hypervisor.h
+++ b/arch/sparc/include/asm/hypervisor.h
@@ -2947,6 +2947,16 @@ 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
@@ -2978,6 +2988,7 @@ 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 c0a2de0fd624..5c55145bfbf0 100644
--- 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 f3ab509b76a8..caedf8320416 100644
--- 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 269af58497aa..7e967c8018c8 100644
--- 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 d35c490a91cb..c9759ad3f34a 100644
--- 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;
}