linux-kernel - [PATCH 09/15] xen/trace: add tlb flush tracepoints

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Message-Id: <4db3e32a6b21efdb4d82646816ddb1bb82ff2259.1308607697.git.jeremy.fitzhardinge@citrix.com>
Date:	Mon, 20 Jun 2011 15:15:05 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Xen Devel <Xen-devel@...ts.xensource.com>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH 09/15] xen/trace: add tlb flush tracepoints

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/xen/mmu.c         |    8 +++++++
 include/trace/events/xen.h |   48 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+), 0 deletions(-)

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 8aaa398..ad8a226 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1221,6 +1221,8 @@ static void xen_flush_tlb(void)
 	struct mmuext_op *op;
 	struct multicall_space mcs;
 
+	trace_xen_mmu_flush_tlb(0);
+
 	preempt_disable();
 
 	mcs = xen_mc_entry(sizeof(*op));
@@ -1239,6 +1241,8 @@ static void xen_flush_tlb_single(unsigned long addr)
 	struct mmuext_op *op;
 	struct multicall_space mcs;
 
+	trace_xen_mmu_flush_tlb_single(addr);
+
 	preempt_disable();
 
 	mcs = xen_mc_entry(sizeof(*op));
@@ -1261,6 +1265,8 @@ static void xen_flush_tlb_others(const struct cpumask *cpus,
 	} *args;
 	struct multicall_space mcs;
 
+	trace_xen_mmu_flush_tlb_others(cpus, mm, va);
+
 	if (cpumask_empty(cpus))
 		return;		/* nothing to do */
 
@@ -1300,6 +1306,8 @@ static void __xen_write_cr3(bool kernel, unsigned long cr3)
 	struct multicall_space mcs;
 	unsigned long mfn;
 
+	trace_xen_mmu_write_cr3(kernel, cr3);
+
 	if (cr3)
 		mfn = pfn_to_mfn(PFN_DOWN(cr3));
 	else
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index b1f73c4..7d88f7d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -405,6 +405,54 @@ TRACE_EVENT(xen_mmu_pgd_unpin,
 	    TP_printk("mm %p pgd %p", __entry->mm, __entry->pgd)
 	);
 
+TRACE_EVENT(xen_mmu_flush_tlb,
+	    TP_PROTO(int x),
+	    TP_ARGS(x),
+	    TP_STRUCT__entry(__array(char, x, 0)),
+	    TP_fast_assign((void)x),
+	    TP_printk("%s", "")
+	);
+
+TRACE_EVENT(xen_mmu_flush_tlb_single,
+	    TP_PROTO(unsigned long addr),
+	    TP_ARGS(addr),
+	    TP_STRUCT__entry(
+		    __field(unsigned long, addr)
+		    ),
+	    TP_fast_assign(__entry->addr = addr),
+	    TP_printk("addr %lx", __entry->addr)
+	);
+
+TRACE_EVENT(xen_mmu_flush_tlb_others,
+	    TP_PROTO(const struct cpumask *cpus, struct mm_struct *mm,
+		     unsigned long addr),
+	    TP_ARGS(cpus, mm, addr),
+	    TP_STRUCT__entry(
+		    __field(unsigned, ncpus)
+		    __field(struct mm_struct *, mm)
+		    __field(unsigned long, addr)
+		    ),
+	    TP_fast_assign(__entry->ncpus = cpumask_weight(cpus);
+			   __entry->mm = mm;
+			   __entry->addr = addr),
+	    TP_printk("ncpus %d mm %p addr %lx",
+		      __entry->ncpus, __entry->mm, __entry->addr)
+	);
+
+TRACE_EVENT(xen_mmu_write_cr3,
+	    TP_PROTO(bool kernel, unsigned long cr3),
+	    TP_ARGS(kernel, cr3),
+	    TP_STRUCT__entry(
+		    __field(bool, kernel)
+		    __field(unsigned long, cr3)
+		    ),
+	    TP_fast_assign(__entry->kernel = kernel;
+			   __entry->cr3 = cr3),
+	    TP_printk("%s cr3 %lx",
+		      __entry->kernel ? "kernel" : "user", __entry->cr3)
+	);
+
+
 /* CPU */
 TRACE_EVENT(xen_cpu_write_ldt_entry,
 	    TP_PROTO(struct desc_struct *dt, int entrynum, u64 desc),
-- 
1.7.5.4

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