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[Xen-devel] [PATCH 09/15] xen/trace: add tlb flush tracepoints



From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
 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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