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sparc64: T5 PMU

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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>
This commit is contained in:
bob picco 2014-09-16 10:09:06 -04:00 committed by David S. Miller
parent 7c21d533ab
commit 05aa1651e8
5 changed files with 73 additions and 5 deletions
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11
arch/sparc/include/asm/hypervisor.h
View file

@ -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__

1
arch/sparc/kernel/hvapi.c
View file

@ -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 },
};

16
arch/sparc/kernel/hvcalls.S
View file

@ -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)

47
arch/sparc/kernel/pcr.c
View file

@ -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;

3
arch/sparc/kernel/perf_event.c
View file

@ -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;
}