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Groups > linux.kernel > #1219229
| From | christophe leroy <christophe.leroy@c-s.fr> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 |
| Date | 2015-09-04 20:10 +0200 |
| Message-ID | <q53AZ-1e2-9@gated-at.bofh.it> (permalink) |
| References | <q4z0e-7Rx-21@gated-at.bofh.it> <q52lB-7Jv-27@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Le 04/09/2015 18:43, Scott Wood a écrit : > On Thu, Sep 03, 2015 at 11:27:03AM +0200, Christophe Leroy wrote: >> 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> > So, what happens when a kernel is built that supports both 83xx and 86xx? Right, so should we define a processor feature for it ? > Plus, it's e300, not e600, that is the exception among 6xx-style cores. Is it ? I've been looking for special register SIAR (spr 955) in several 6xx reference manuals. 82xx doesn't have it, 52xx and 512x don't have it. I found it only in the 86xx Which other family has it ? Christophe --- L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast. https://www.avast.com/antivirus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 Christophe Leroy <christophe.leroy@c-s.fr> - 2015-09-03 11:30 +0200
Re: [PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 Michael Ellerman <mpe@ellerman.id.au> - 2015-09-03 11:50 +0200
Re: [PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 Scott Wood <scottwood@freescale.com> - 2015-09-04 18:50 +0200
Re: [PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 christophe leroy <christophe.leroy@c-s.fr> - 2015-09-04 20:10 +0200
Re: [PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 Segher Boessenkool <segher@kernel.crashing.org> - 2015-09-04 21:00 +0200
Re: [PATCH] powerpc/book3s32: Only select PPC_HAVE_PMU on e600 Segher Boessenkool <segher@kernel.crashing.org> - 2015-09-04 22:00 +0200
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