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powerpc/perf: Power11 Performance Monitoring support

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Base enablement patch to register performance monitoring
hardware support for Power11. Most of fields are copied
from power10_pmu struct for power11_pmu struct.

Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240221044623.1598642-2-mpe@ellerman.id.au
This commit is contained in:
Madhavan Srinivasan 2024-02-21 15:46:23 +11:00 committed by Michael Ellerman
parent c2ed087ed3
commit b22ea62722
3 changed files with 30 additions and 0 deletions
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2
arch/powerpc/perf/core-book3s.c
View file

@ -2593,6 +2593,8 @@ static int __init init_ppc64_pmu(void)
return 0;
else if (!init_power10_pmu())
return 0;
else if (!init_power11_pmu())
return 0;
else if (!init_ppc970_pmu())
return 0;
else

1
arch/powerpc/perf/internal.h
View file

@ -10,4 +10,5 @@ int __init init_power7_pmu(void);
int __init init_power8_pmu(void);
int __init init_power9_pmu(void);
int __init init_power10_pmu(void);
int __init init_power11_pmu(void);
int __init init_generic_compat_pmu(void);

27
arch/powerpc/perf/power10-pmu.c
View file

@ -634,3 +634,30 @@ int __init init_power10_pmu(void)
return 0;
}
static struct power_pmu power11_pmu;
int __init init_power11_pmu(void)
{
unsigned int pvr;
int rc;
pvr = mfspr(SPRN_PVR);
if (PVR_VER(pvr) != PVR_POWER11)
return -ENODEV;
/* Set the PERF_REG_EXTENDED_MASK here */
PERF_REG_EXTENDED_MASK = PERF_REG_PMU_MASK_31;
power11_pmu = power10_pmu;
power11_pmu.name = "Power11";
rc = register_power_pmu(&power11_pmu);
if (rc)
return rc;
/* Tell userspace that EBB is supported */
cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB;
return 0;
}