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Date: Fri, 26 Oct 2012 14:49:22 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: David Howells <dhowells@...hat.com>
Cc: mingo@...nel.org, tglx@...utronix.de, acme@...stprotocols.net,
davem@...emloft.net, torvalds@...ux-foundation.org,
paulus@...ba.org, linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH 3/5] perf: Make perf build for x86 with UAPI disintegration applied
On Fri, 19 Oct 2012 17:56:24 +0100, David Howells wrote:
> Make perf build for x86 once the UAPI disintegration patches for that arch
> have been applied by adding the appropriate -I flags - in the right order -
> and then converting some #includes that use ../.. notation to find main kernel
> headerfiles to use <asm/foo.h> and <linux/foo.h> instead.
Looks nice.
>
> Note that -Iarch/foo/include/uapi is present _before_ -Iarch/foo/include.
> This makes sure we get the userspace version of the pt_regs struct. Ideally,
> we wouldn't have the latter -I flag at all, but unfortunately we want
> asm/svm.h and asm/vmx.h in buildin-kvm.c and these aren't part of the UAPI -
> at least not for x86. I wonder if the bits outside of the __KERNEL__ guards
> *should* be transferred there.
What about asm/kvm.h? Is it a part of the UAPI?
>
> I note also that perf seems to do its dependency handling manually by listing
> all the header files it might want to use in LIB_H in the Makefile. Can this
> be changed to use -MD?
Yeah, that part could be improved, probably with -MMD.
>
> Signed-off-by: David Howells <dhowells@...hat.com>
> ---
>
> tools/perf/Makefile | 16 +++++++++++++++-
> tools/perf/builtin-kvm.c | 6 +++---
> tools/perf/perf.h | 16 +++-------------
> 3 files changed, 21 insertions(+), 17 deletions(-)
>
> diff --git a/tools/perf/Makefile b/tools/perf/Makefile
> index f7c968a..9024a42 100644
> --- a/tools/perf/Makefile
> +++ b/tools/perf/Makefile
> @@ -169,7 +169,21 @@ endif
>
> ### --- END CONFIGURATION SECTION ---
>
> -BASIC_CFLAGS = -Iutil/include -Iarch/$(ARCH)/include -I$(OUTPUT)util -I$(TRACE_EVENT_DIR) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
> +ifeq ($(srctree),)
> +srctree := $(shell pwd)
> +endif
Isn't the srctree intended to point to kernel root? Also you missed to
define the objtree which used below.
> +
> +BASIC_CFLAGS = \
> + -Iutil/include \
> + -Iarch/$(ARCH)/include \
> + -I$(objtree)/arch/$(ARCH)/include/generated/uapi \
> + -I$(srctree)/arch/$(ARCH)/include/uapi \
> + -I$(srctree)/arch/$(ARCH)/include \
> + -I$(objtree)/include/generated/uapi \
> + -I$(srctree)/include/uapi \
> + -I$(OUTPUT)util \
> + -I$(TRACE_EVENT_DIR) \
> + -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
This isn't bad, but using '+=' looks more natural IMHO.
BASIC_CFLAGS = -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
BASIC_CFLAGS += -Iutil/include
BASIC_CFLAGS += -Iarch/$(ARCH)/include
...
> BASIC_LDFLAGS =
>
> # Guard against environment variables
> diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
> index 260abc5..e013bdb 100644
> --- a/tools/perf/builtin-kvm.c
> +++ b/tools/perf/builtin-kvm.c
> @@ -22,9 +22,9 @@
> #include <pthread.h>
> #include <math.h>
>
> -#include "../../arch/x86/include/asm/svm.h"
> -#include "../../arch/x86/include/asm/vmx.h"
> -#include "../../arch/x86/include/asm/kvm.h"
> +#include <asm/svm.h>
> +#include <asm/vmx.h>
> +#include <asm/kvm.h>
>
> struct event_key {
> #define INVALID_KEY (~0ULL)
> diff --git a/tools/perf/perf.h b/tools/perf/perf.h
> index 2762877..238f923 100644
> --- a/tools/perf/perf.h
> +++ b/tools/perf/perf.h
> @@ -5,8 +5,9 @@ struct winsize;
>
> void get_term_dimensions(struct winsize *ws);
>
> +#include <asm/unistd.h>
> +
> #if defined(__i386__)
> -#include "../../arch/x86/include/asm/unistd.h"
> #define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
> #define cpu_relax() asm volatile("rep; nop" ::: "memory");
> #define CPUINFO_PROC "model name"
> @@ -16,7 +17,6 @@ void get_term_dimensions(struct winsize *ws);
> #endif
>
> #if defined(__x86_64__)
> -#include "../../arch/x86/include/asm/unistd.h"
> #define rmb() asm volatile("lfence" ::: "memory")
> #define cpu_relax() asm volatile("rep; nop" ::: "memory");
> #define CPUINFO_PROC "model name"
> @@ -26,20 +26,17 @@ void get_term_dimensions(struct winsize *ws);
> #endif
>
> #ifdef __powerpc__
> -#include "../../arch/powerpc/include/asm/unistd.h"
> #define rmb() asm volatile ("sync" ::: "memory")
> #define cpu_relax() asm volatile ("" ::: "memory");
> #define CPUINFO_PROC "cpu"
> #endif
>
> #ifdef __s390__
> -#include "../../arch/s390/include/asm/unistd.h"
> #define rmb() asm volatile("bcr 15,0" ::: "memory")
> #define cpu_relax() asm volatile("" ::: "memory");
> #endif
>
> #ifdef __sh__
> -#include "../../arch/sh/include/asm/unistd.h"
> #if defined(__SH4A__) || defined(__SH5__)
> # define rmb() asm volatile("synco" ::: "memory")
> #else
> @@ -50,35 +47,30 @@ void get_term_dimensions(struct winsize *ws);
> #endif
>
> #ifdef __hppa__
> -#include "../../arch/parisc/include/asm/unistd.h"
> #define rmb() asm volatile("" ::: "memory")
> #define cpu_relax() asm volatile("" ::: "memory");
> #define CPUINFO_PROC "cpu"
> #endif
>
> #ifdef __sparc__
> -#include "../../arch/sparc/include/asm/unistd.h"
It might conflict with davem's sparc uapi patch which merged into tip:
commit 77626081849c9050b20670e5d832aca54c966936
Author: David Miller <davem@...emloft.net>
Date: Wed Oct 17 01:06:56 2012 -0400
perf tools: Fix build on sparc.
More UAPI stuff.
> #define rmb() asm volatile("":::"memory")
> #define cpu_relax() asm volatile("":::"memory")
> #define CPUINFO_PROC "cpu"
> #endif
>
> #ifdef __alpha__
> -#include "../../arch/alpha/include/asm/unistd.h"
> #define rmb() asm volatile("mb" ::: "memory")
> #define cpu_relax() asm volatile("" ::: "memory")
> #define CPUINFO_PROC "cpu model"
> #endif
>
> #ifdef __ia64__
> -#include "../../arch/ia64/include/asm/unistd.h"
> #define rmb() asm volatile ("mf" ::: "memory")
> #define cpu_relax() asm volatile ("hint @pause" ::: "memory")
> #define CPUINFO_PROC "model name"
> #endif
>
> #ifdef __arm__
> -#include "../../arch/arm/include/asm/unistd.h"
> /*
> * Use the __kuser_memory_barrier helper in the CPU helper page. See
> * arch/arm/kernel/entry-armv.S in the kernel source for details.
> @@ -89,13 +81,11 @@ void get_term_dimensions(struct winsize *ws);
> #endif
>
> #ifdef __aarch64__
> -#include "../../arch/arm64/include/asm/unistd.h"
> #define rmb() asm volatile("dmb ld" ::: "memory")
> #define cpu_relax() asm volatile("yield" ::: "memory")
> #endif
>
> #ifdef __mips__
> -#include "../../arch/mips/include/asm/unistd.h"
> #define rmb() asm volatile( \
> ".set mips2\n\t" \
> "sync\n\t" \
> @@ -112,7 +102,7 @@ void get_term_dimensions(struct winsize *ws);
> #include <sys/types.h>
> #include <sys/syscall.h>
>
> -#include "../../include/uapi/linux/perf_event.h"
And I got a conflict here.
Thanks,
Namhyung
> +#include <linux/perf_event.h>
> #include "util/types.h"
> #include <stdbool.h>
>
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