Messages in this thread Patch in this message | | | From | Christophe Leroy <> | Subject | [PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 | Date | Thu, 3 Sep 2015 11:27:03 +0200 (CEST) |
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On PPC832x, perf record/report reports martian addresses
2.62% perf_reseau4 libpthread-2.18.so [.] __libc_send 2.56% perf_reseau4 [kernel.kallsyms] [k] __ip_make_skb 1.62% perf_reseau4 [kernel.kallsyms] [k] __ip_append_data.isra.39 1.55% perf_reseau4 [kernel.kallsyms] [k] ip_finish_output 1.33% perf_reseau4 [unknown] [k] 0x7ffffd94 1.33% perf_reseau4 [unknown] [k] 0x7ffffd95 1.28% perf_reseau4 [unknown] [k] 0x7ffffd97 1.26% perf_reseau4 [unknown] [k] 0x7ffffda3 1.24% perf_reseau4 [unknown] [k] 0x7ffffd98 1.22% perf_reseau4 [unknown] [k] 0x7ffffd92 1.22% perf_reseau4 [unknown] [k] 0x7ffffd9b [.....]
This is due to function perf_instruction_pointer() reading SPR SIAR which doesn't exist on e300 core. The perf_instruction_pointer() is redefined in arch/powerpc/perf/core-book3s.c when CONFIG_PPC_PERF_CTRS is selected.
This patch moves the selection of CONFIG_PPC_HAVE_PMU in 86xx section so that CONFIG_PPC_PERF_CTRS won't be selected for other 6xx powerpc
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> --- arch/powerpc/platforms/86xx/Kconfig | 1 + arch/powerpc/platforms/Kconfig.cputype | 1 - 2 files changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/86xx/Kconfig b/arch/powerpc/platforms/86xx/Kconfig index 1afd1e4..bb24d2a 100644 --- a/arch/powerpc/platforms/86xx/Kconfig +++ b/arch/powerpc/platforms/86xx/Kconfig @@ -5,6 +5,7 @@ menuconfig PPC_86xx select FSL_SOC select ALTIVEC select ARCH_WANT_OPTIONAL_GPIOLIB + select PPC_HAVE_PMU_SUPPORT help The Freescale E600 SoCs have 74xx cores. diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index d642cf9..aa63b12 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -143,7 +143,6 @@ config PPC_BOOK3E config 6xx def_bool y depends on PPC32 && PPC_BOOK3S - select PPC_HAVE_PMU_SUPPORT config TUNE_CELL bool "Optimize for Cell Broadband Engine" -- 2.1.0
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