powerpc/perf: Expose instruction and data address registers as part of extended regs

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@linux.vnet.ibm.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Kajol Jain<kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211007065505.27809-4-atrajeev@linux.vnet.ibm.com

arch/powerpc/include/uapi/asm/perf_regs.h

@@ -61,17 +61,19 @@ 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 mask value for interrupt regs w/o extended regs */
 	PERF_REG_POWERPC_MAX = PERF_REG_POWERPC_MMCRA + 1,
 	/* Max mask value for interrupt regs including extended regs */
-	PERF_REG_EXTENDED_MAX = PERF_REG_POWERPC_PMC6 + 1,
+	PERF_REG_EXTENDED_MAX = PERF_REG_POWERPC_SIAR + 1,
 };
 
 #define PERF_REG_PMU_MASK	((1ULL << PERF_REG_POWERPC_MAX) - 1)
 
 /*
  * 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 MMCR3, SIER2 and SIER3.
  */
 #define PERF_REG_PMU_MASK_300	\
@@ -79,11 +81,12 @@ enum perf_event_powerpc_regs {
 	(1ULL << PERF_REG_POWERPC_MMCR2) | (1ULL << PERF_REG_POWERPC_PMC1) | \
 	(1ULL << PERF_REG_POWERPC_PMC2) | (1ULL << PERF_REG_POWERPC_PMC3) | \
 	(1ULL << PERF_REG_POWERPC_PMC4) | (1ULL << PERF_REG_POWERPC_PMC5) | \
-	(1ULL << PERF_REG_POWERPC_PMC6))
+	(1ULL << PERF_REG_POWERPC_PMC6) | (1ULL << PERF_REG_POWERPC_SDAR) | \
+	(1ULL << PERF_REG_POWERPC_SIAR))
 
 /*
  * 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	\
 	(PERF_REG_PMU_MASK_300 | (1ULL << PERF_REG_POWERPC_MMCR3) | \

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;
 	}
 }