Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751523AbaLCFWI (ORCPT ); Wed, 3 Dec 2014 00:22:08 -0500 Received: from ozlabs.org ([103.22.144.67]:54419 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750927AbaLCFWG (ORCPT ); Wed, 3 Dec 2014 00:22:06 -0500 In-Reply-To: <1417507013-11948-2-git-send-email-khandual@linux.vnet.ibm.com> To: Anshuman Khandual , linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org From: Michael Ellerman Cc: shuahkh@osg.samsung.com, mikey@neuling.org, james.hogan@imgtec.com, avagin@openvz.org, Paul.Clothier@imgtec.com, peterz@infradead.org, palves@redhat.com, oleg@redhat.com, davem@davemloft.net, dhowells@redhat.com, kirjanov@gmail.com, davej@redhat.com, akpm@linux-foundation.org, sukadev@linux.vnet.ibm.com, tglx@linutronix.de, sam.bobroff@au1.ibm.com Subject: Re: [V6,1/9] elf: Add new powerpc specifc core note sections Message-Id: <20141203052204.9DA8F1400DD@ozlabs.org> Date: Wed, 3 Dec 2014 16:22:04 +1100 (AEDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2014-02-12 at 07:56:45 UTC, Anshuman Khandual wrote: > This patch adds four new ELF core note sections for powerpc > transactional memory and one new ELF core note section for > powerpc general miscellaneous debug registers. These addition > of new ELF core note sections extends the existing ELF ABI > without affecting it in any manner. > > Acked-by: Andrew Morton > Signed-off-by: Anshuman Khandual > --- > include/uapi/linux/elf.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h > index ea9bf25..2260fc0 100644 > --- a/include/uapi/linux/elf.h > +++ b/include/uapi/linux/elf.h > @@ -379,6 +379,11 @@ typedef struct elf64_shdr { > #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */ > #define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */ > #define NT_PPC_VSX 0x102 /* PowerPC VSX registers */ > +#define NT_PPC_TM_SPR 0x103 /* PowerPC TM special registers */ > +#define NT_PPC_TM_CGPR 0x104 /* PowerpC TM checkpointed GPR */ > +#define NT_PPC_TM_CFPR 0x105 /* PowerPC TM checkpointed FPR */ > +#define NT_PPC_TM_CVMX 0x106 /* PowerPC TM checkpointed VMX */ > +#define NT_PPC_MISC 0x107 /* PowerPC miscellaneous registers */ This is a really terrible name, "MISC". Having said that, I guess it's accurate. We have a whole bunch of regs that have accrued over recent years that aren't accessible via ptrace. It seems to me if we're adding a misc regset we should be adding everything we might want to it that is currenty architected. But currently you only include the PPR, TAR & DSCR. Looking at Power ISA v2.07, I see the following that could be included: MMCR2 MMCRA PMC1 PMC2 PMC3 PMC4 PMC5 PMC6 MMCR0 EBBHR EBBRR BESCR SIAR SDAR CFAR? Those are all new in 2.07 except for CFAR. There might be more I missed, that was just a quick scan. Some are only accessible when EBB is in use, maybe those could be a separate regset. cheers -- 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/