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tracing/hyper-v: Trace hyperv_mmu_flush_tlb_others()

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Add Hyper-V tracing subsystem and trace hyperv_mmu_flush_tlb_others().
Tracing is done the same way we do xen_mmu_flush_tlb_others().

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: devel@linuxdriverproject.org
Link: http://lkml.kernel.org/r/20170802160921.21791-10-vkuznets@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Vitaly Kuznetsov 2017-08-02 18:09:21 +02:00 committed by Ingo Molnar
parent 628f54cc64
commit 773b79f7a7
3 changed files with 48 additions and 0 deletions
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1
MAINTAINERS
View File

@ -6258,6 +6258,7 @@ M: Stephen Hemminger <sthemmin@microsoft.com>
L: devel@linuxdriverproject.org
S: Maintained
F: arch/x86/include/asm/mshyperv.h
F: arch/x86/include/asm/trace/hyperv.h
F: arch/x86/include/uapi/asm/hyperv.h
F: arch/x86/kernel/cpu/mshyperv.c
F: arch/x86/hyperv

7
arch/x86/hyperv/mmu.c
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@ -10,6 +10,9 @@
#include <asm/msr.h>
#include <asm/tlbflush.h>
#define CREATE_TRACE_POINTS
#include <asm/trace/hyperv.h>
/* HvFlushVirtualAddressSpace, HvFlushVirtualAddressList hypercalls */
struct hv_flush_pcpu {
u64 address_space;
@ -103,6 +106,8 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus,
u64 status = U64_MAX;
unsigned long flags;
trace_hyperv_mmu_flush_tlb_others(cpus, info);
if (!pcpu_flush || !hv_hypercall_pg)
goto do_native;
@ -172,6 +177,8 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
u64 status = U64_MAX;
unsigned long flags;
trace_hyperv_mmu_flush_tlb_others(cpus, info);
if (!pcpu_flush_ex || !hv_hypercall_pg)
goto do_native;

40
arch/x86/include/asm/trace/hyperv.h Normal file
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@ -0,0 +1,40 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM hyperv
#if !defined(_TRACE_HYPERV_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HYPERV_H
#include <linux/tracepoint.h>
#if IS_ENABLED(CONFIG_HYPERV)
TRACE_EVENT(hyperv_mmu_flush_tlb_others,
TP_PROTO(const struct cpumask *cpus,
const struct flush_tlb_info *info),
TP_ARGS(cpus, info),
TP_STRUCT__entry(
__field(unsigned int, ncpus)
__field(struct mm_struct *, mm)
__field(unsigned long, addr)
__field(unsigned long, end)
),
TP_fast_assign(__entry->ncpus = cpumask_weight(cpus);
__entry->mm = info->mm;
__entry->addr = info->start;
__entry->end = info->end;
),
TP_printk("ncpus %d mm %p addr %lx, end %lx",
__entry->ncpus, __entry->mm,
__entry->addr, __entry->end)
);
#endif /* CONFIG_HYPERV */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH asm/trace/
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE hyperv
#endif /* _TRACE_HYPERV_H */
/* This part must be outside protection */
#include <trace/define_trace.h>