Merge branch 'upstream/xen-tracing2' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen

* 'upstream/xen-tracing2' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen/trace: use class for multicall trace
  xen/trace: convert mmu events to use DECLARE_EVENT_CLASS()/DEFINE_EVENT()
  xen/multicall: move *idx fields to start of mc_buffer
  xen/multicall: special-case singleton hypercalls
  xen/multicalls: add unlikely around slowpath in __xen_mc_entry()
  xen/multicalls: disable MC_DEBUG
  xen/mmu: tune pgtable alloc/release
  xen/mmu: use extend_args for more mmuext updates
  xen/trace: add tlb flush tracepoints
  xen/trace: add segment desc tracing
  xen/trace: add xen_pgd_(un)pin tracepoints
  xen/trace: add ptpage alloc/release tracepoints
  xen/trace: add mmu tracepoints
  xen/trace: add multicall tracing
  xen/trace: set up tracepoint skeleton
  xen/multicalls: remove debugfs stats
  trace/xen: add skeleton for Xen trace events

2 files changed, 40 insertions, 0 deletions

diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index d240ea950519..417777de5a40 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -39,6 +39,8 @@
 #include <linux/string.h>
 #include <linux/types.h>
 
+#include <trace/events/xen.h>
+
 #include <asm/page.h>
 #include <asm/pgtable.h>
 
@@ -459,6 +461,8 @@ MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
 {
         mcl->op = __HYPERVISOR_fpu_taskswitch;
         mcl->args[0] = set;
+
+        trace_xen_mc_entry(mcl, 1);
 }
 
 static inline void
@@ -475,6 +479,8 @@ MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
                 mcl->args[2] = new_val.pte >> 32;
                 mcl->args[3] = flags;
         }
+
+        trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
 }
 
 static inline void
@@ -485,6 +491,8 @@ MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
         mcl->args[0] = cmd;
         mcl->args[1] = (unsigned long)uop;
         mcl->args[2] = count;
+
+        trace_xen_mc_entry(mcl, 3);
 }
 
 static inline void
@@ -504,6 +512,8 @@ MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long v
                 mcl->args[3] = flags;
                 mcl->args[4] = domid;
         }
+
+        trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 4 : 5);
 }
 
 static inline void
@@ -520,6 +530,8 @@ MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
                 mcl->args[2] = desc.a;
                 mcl->args[3] = desc.b;
         }
+
+        trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
 }
 
 static inline void
@@ -528,6 +540,8 @@ MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
         mcl->op = __HYPERVISOR_memory_op;
         mcl->args[0] = cmd;
         mcl->args[1] = (unsigned long)arg;
+
+        trace_xen_mc_entry(mcl, 2);
 }
 
 static inline void
@@ -539,6 +553,8 @@ MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
         mcl->args[1] = count;
         mcl->args[2] = (unsigned long)success_count;
         mcl->args[3] = domid;
+
+        trace_xen_mc_entry(mcl, 4);
 }
 
 static inline void
@@ -550,6 +566,8 @@ MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
         mcl->args[1] = count;
         mcl->args[2] = (unsigned long)success_count;
         mcl->args[3] = domid;
+
+        trace_xen_mc_entry(mcl, 4);
 }
 
 static inline void
@@ -558,6 +576,8 @@ MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
         mcl->op = __HYPERVISOR_set_gdt;
         mcl->args[0] = (unsigned long)frames;
         mcl->args[1] = entries;
+
+        trace_xen_mc_entry(mcl, 2);
 }
 
 static inline void
@@ -567,6 +587,8 @@ MULTI_stack_switch(struct multicall_entry *mcl,
         mcl->op = __HYPERVISOR_stack_switch;
         mcl->args[0] = ss;
         mcl->args[1] = esp;
+
+        trace_xen_mc_entry(mcl, 2);
 }
 
 #endif /* _ASM_X86_XEN_HYPERCALL_H */
diff --git a/arch/x86/include/asm/xen/trace_types.h b/arch/x86/include/asm/xen/trace_types.h
new file mode 100644
index 000000000000..21e1874c0a0b
--- /dev/null
+++ b/arch/x86/include/asm/xen/trace_types.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_XEN_TRACE_TYPES_H
+#define _ASM_XEN_TRACE_TYPES_H
+
+enum xen_mc_flush_reason {
+        XEN_MC_FL_NONE,         /* explicit flush */
+        XEN_MC_FL_BATCH,        /* out of hypercall space */
+        XEN_MC_FL_ARGS,         /* out of argument space */
+        XEN_MC_FL_CALLBACK,     /* out of callback space */
+};
+
+enum xen_mc_extend_args {
+        XEN_MC_XE_OK,
+        XEN_MC_XE_BAD_OP,
+        XEN_MC_XE_NO_SPACE
+};
+typedef void (*xen_mc_callback_fn_t)(void *);
+
+#endif  /* _ASM_XEN_TRACE_TYPES_H */