[PATCH 1/2] powerpc/perf: Expose instruction and data address registers as part of extended regs
Athira Rajeev
atrajeev at linux.vnet.ibm.com
Mon Jun 21 00:45:59 AEST 2021
Patch adds support to include Sampled Instruction Address Register
(SIAR) and Sampled Data Address Register (SDAR) SPRs as part of extended
registers. Update the definition of PERF_REG_PMU_MASK_300/31 and
PERF_REG_EXTENDED_MAX to include these SPR's.
Signed-off-by: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
---
arch/powerpc/include/uapi/asm/perf_regs.h | 12 +++++++-----
arch/powerpc/perf/perf_regs.c | 4 ++++
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/include/uapi/asm/perf_regs.h b/arch/powerpc/include/uapi/asm/perf_regs.h
index 578b3ee..cf5eee5 100644
--- a/arch/powerpc/include/uapi/asm/perf_regs.h
+++ b/arch/powerpc/include/uapi/asm/perf_regs.h
@@ -61,6 +61,8 @@ enum perf_event_powerpc_regs {
PERF_REG_POWERPC_PMC4,
PERF_REG_POWERPC_PMC5,
PERF_REG_POWERPC_PMC6,
+ PERF_REG_POWERPC_SDAR,
+ PERF_REG_POWERPC_SIAR,
/* Max regs without the extended regs */
PERF_REG_POWERPC_MAX = PERF_REG_POWERPC_MMCRA + 1,
};
@@ -72,16 +74,16 @@ enum perf_event_powerpc_regs {
/*
* PERF_REG_EXTENDED_MASK value for CPU_FTR_ARCH_300
- * includes 9 SPRS from MMCR0 to PMC6 excluding the
+ * includes 11 SPRS from MMCR0 to SIAR excluding the
* unsupported SPRS in PERF_EXCLUDE_REG_EXT_300.
*/
-#define PERF_REG_PMU_MASK_300 ((0xfffULL << PERF_REG_POWERPC_MMCR0) - PERF_EXCLUDE_REG_EXT_300)
+#define PERF_REG_PMU_MASK_300 ((0x3fffULL << PERF_REG_POWERPC_MMCR0) - PERF_EXCLUDE_REG_EXT_300)
/*
* PERF_REG_EXTENDED_MASK value for CPU_FTR_ARCH_31
- * includes 12 SPRs from MMCR0 to PMC6.
+ * includes 14 SPRs from MMCR0 to SIAR.
*/
-#define PERF_REG_PMU_MASK_31 (0xfffULL << PERF_REG_POWERPC_MMCR0)
+#define PERF_REG_PMU_MASK_31 (0x3fffULL << PERF_REG_POWERPC_MMCR0)
-#define PERF_REG_EXTENDED_MAX (PERF_REG_POWERPC_PMC6 + 1)
+#define PERF_REG_EXTENDED_MAX (PERF_REG_POWERPC_SIAR + 1)
#endif /* _UAPI_ASM_POWERPC_PERF_REGS_H */
diff --git a/arch/powerpc/perf/perf_regs.c b/arch/powerpc/perf/perf_regs.c
index b931eed..51d31b6 100644
--- a/arch/powerpc/perf/perf_regs.c
+++ b/arch/powerpc/perf/perf_regs.c
@@ -90,7 +90,11 @@ static u64 get_ext_regs_value(int idx)
return mfspr(SPRN_SIER2);
case PERF_REG_POWERPC_SIER3:
return mfspr(SPRN_SIER3);
+ case PERF_REG_POWERPC_SDAR:
+ return mfspr(SPRN_SDAR);
#endif
+ case PERF_REG_POWERPC_SIAR:
+ return mfspr(SPRN_SIAR);
default: return 0;
}
}
--
1.8.3.1
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