linux-kernel - Re: [PATCH] [BUGFIX] Fix build error caused by an undefinition of the kvm_write_tsc_offset tracepoint for x86

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Date:	Tue, 25 Jun 2013 13:43:39 +0300
From:	Gleb Natapov <gleb@...hat.com>
To:	Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, David Sharp <dhsharp@...gle.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>,
	Ingo Molnar <mingo@...hat.com>, yrl.pp-manager.tt@...achi.com,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH] [BUGFIX] Fix build error caused by an undefinition of
 the kvm_write_tsc_offset tracepoint for x86_32

On Tue, Jun 25, 2013 at 07:18:35PM +0900, Yoshihiro YUNOMAE wrote:
> Hi Gleb,
> 
> Thank you for applying my patch.
> I received a mail of build error for i386, so I fixed the problem.
> Since the tracepoint was defined only for x86_64, build was failed in
> x86_32.
> 
> Would you apply this patch to kvm-tree?
> Sorry for the inconvenience this may cause.
> 
No inconvenience. I amended your previous commit since it was still on
the branch that can be rebased.

> Thank you,
> Yoshihiro YUNOMAE
> 
> (2013/06/25 19:16), Yoshihiro YUNOMAE wrote:
> >Fix build error caused by an undefinition of the kvm_write_tsc_offset
> >tracepoint for x86_32.
> >Since the tracepoint in trace.h was defined for CONFIG_X86_64, kernel build
> >on i386 was failed.
> >
> >Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
> >Cc: Joerg Roedel <joro@...tes.org>
> >Cc: Gleb Natapov <gleb@...hat.com>
> >Cc: Paolo Bonzini <pbonzini@...hat.com>
> >Cc: Thomas Gleixner <tglx@...utronix.de>
> >Cc: Ingo Molnar <mingo@...hat.com>
> >Cc: "H. Peter Anvin" <hpa@...or.com>
> >---
> >  arch/x86/kvm/trace.h |   42 +++++++++++++++++++++---------------------
> >  1 file changed, 21 insertions(+), 21 deletions(-)
> >
> >diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
> >index 6c82cf1..545245d 100644
> >--- a/arch/x86/kvm/trace.h
> >+++ b/arch/x86/kvm/trace.h
> >@@ -756,6 +756,27 @@ TRACE_EVENT(
> >  		  __entry->gpa_match ? "GPA" : "GVA")
> >  );
> >
> >+TRACE_EVENT(kvm_write_tsc_offset,
> >+	TP_PROTO(unsigned int vcpu_id, __u64 previous_tsc_offset,
> >+		 __u64 next_tsc_offset),
> >+	TP_ARGS(vcpu_id, previous_tsc_offset, next_tsc_offset),
> >+
> >+	TP_STRUCT__entry(
> >+		__field( unsigned int,	vcpu_id				)
> >+		__field(	__u64,	previous_tsc_offset		)
> >+		__field(	__u64,	next_tsc_offset			)
> >+	),
> >+
> >+	TP_fast_assign(
> >+		__entry->vcpu_id		= vcpu_id;
> >+		__entry->previous_tsc_offset	= previous_tsc_offset;
> >+		__entry->next_tsc_offset	= next_tsc_offset;
> >+	),
> >+
> >+	TP_printk("vcpu=%u prev=%llu next=%llu", __entry->vcpu_id,
> >+		  __entry->previous_tsc_offset, __entry->next_tsc_offset)
> >+);
> >+
> >  #ifdef CONFIG_X86_64
> >
> >  #define host_clocks					\
> >@@ -815,27 +836,6 @@ TRACE_EVENT(kvm_track_tsc,
> >  		  __print_symbolic(__entry->host_clock, host_clocks))
> >  );
> >
> >-TRACE_EVENT(kvm_write_tsc_offset,
> >-	TP_PROTO(unsigned int vcpu_id, __u64 previous_tsc_offset,
> >-		 __u64 next_tsc_offset),
> >-	TP_ARGS(vcpu_id, previous_tsc_offset, next_tsc_offset),
> >-
> >-	TP_STRUCT__entry(
> >-		__field( unsigned int,	vcpu_id				)
> >-		__field(	__u64,	previous_tsc_offset		)
> >-		__field(	__u64,	next_tsc_offset			)
> >-	),
> >-
> >-	TP_fast_assign(
> >-		__entry->vcpu_id		= vcpu_id;
> >-		__entry->previous_tsc_offset	= previous_tsc_offset;
> >-		__entry->next_tsc_offset	= next_tsc_offset;
> >-	),
> >-
> >-	TP_printk("vcpu=%u prev=%llu next=%llu", __entry->vcpu_id,
> >-		  __entry->previous_tsc_offset, __entry->next_tsc_offset)
> >-);
> >-
> >  #endif /* CONFIG_X86_64 */
> >
> >  #endif /* _TRACE_KVM_H */
> >
> >--
> >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> >the body of a message to majordomo@...r.kernel.org
> >More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >Please read the FAQ at  http://www.tux.org/lkml/
> >
> 
> -- 
> Yoshihiro YUNOMAE
> Software Platform Research Dept. Linux Technology Center
> Hitachi, Ltd., Yokohama Research Laboratory
> E-mail: yoshihiro.yunomae.ez@...achi.com
> 

--
			Gleb.
--
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