From: Tianyu Lan <Tianyu.Lan@microsoft.com>
Date: Thu, 19 Jul 2018 08:40:12 +0000
Patch-mainline: v4.19-rc1
Subject: X86/Hyper-V: Add hyperv_nested_flush_guest_mapping ftrace support
Git-commit: 60cfce4c4f6f6741882032ee6f895e835533a16b
References: fate#323887
This patch is to add hyperv_nested_flush_guest_mapping support to trace
hvFlushGuestPhysicalAddressSpace hypercall.
Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Olaf Hering <ohering@suse.de>
---
arch/x86/hyperv/nested.c | 3 +++
arch/x86/include/asm/trace/hyperv.h | 14 ++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/arch/x86/hyperv/nested.c b/arch/x86/hyperv/nested.c
--- a/arch/x86/hyperv/nested.c
+++ b/arch/x86/hyperv/nested.c
@@ -14,6 +14,8 @@
#include <asm/mshyperv.h>
#include <asm/tlbflush.h>
+#include <asm/trace/hyperv.h>
+
int hyperv_flush_guest_mapping(u64 as)
{
struct hv_guest_mapping_flush **flush_pcpu;
@@ -48,6 +50,7 @@ int hyperv_flush_guest_mapping(u64 as)
ret = 0;
fault:
+ trace_hyperv_nested_flush_guest_mapping(as, ret);
return ret;
}
EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping);
diff --git a/arch/x86/include/asm/trace/hyperv.h b/arch/x86/include/asm/trace/hyperv.h
--- a/arch/x86/include/asm/trace/hyperv.h
+++ b/arch/x86/include/asm/trace/hyperv.h
@@ -28,6 +28,20 @@ TRACE_EVENT(hyperv_mmu_flush_tlb_others,
__entry->ncpus, __entry->vector)
);
+TRACE_EVENT(hyperv_nested_flush_guest_mapping,
+ TP_PROTO(u64 as, int ret),
+ TP_ARGS(as, ret),
+
+ TP_STRUCT__entry(
+ __field(u64, as)
+ __field(int, ret)
+ ),
+ TP_fast_assign(__entry->as = as;
+ __entry->ret = ret;
+ ),
+ TP_printk("address space %llx ret %d", __entry->as, __entry->ret)
+ );
+
#endif /* CONFIG_HYPERV */
#undef TRACE_INCLUDE_PATH