diff options
Diffstat (limited to 'virt/kvm')
-rw-r--r-- | virt/kvm/kvm_trace.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/virt/kvm/kvm_trace.c b/virt/kvm/kvm_trace.c index 0e495470788d..58141f31ea8f 100644 --- a/virt/kvm/kvm_trace.c +++ b/virt/kvm/kvm_trace.c | |||
@@ -72,11 +72,7 @@ static void kvm_add_trace(void *probe_private, void *call_data, | |||
72 | rec.cycle_in = p->cycle_in; | 72 | rec.cycle_in = p->cycle_in; |
73 | 73 | ||
74 | if (rec.cycle_in) { | 74 | if (rec.cycle_in) { |
75 | u64 cycle = 0; | 75 | rec.u.cycle.cycle_u64 = get_cycles(); |
76 | |||
77 | cycle = get_cycles(); | ||
78 | rec.u.cycle.cycle_lo = (u32)cycle; | ||
79 | rec.u.cycle.cycle_hi = (u32)(cycle >> 32); | ||
80 | 76 | ||
81 | for (i = 0; i < rec.extra_u32; i++) | 77 | for (i = 0; i < rec.extra_u32; i++) |
82 | rec.u.cycle.extra_u32[i] = va_arg(*args, u32); | 78 | rec.u.cycle.extra_u32[i] = va_arg(*args, u32); |
@@ -114,8 +110,18 @@ static int kvm_subbuf_start_callback(struct rchan_buf *buf, void *subbuf, | |||
114 | { | 110 | { |
115 | struct kvm_trace *kt; | 111 | struct kvm_trace *kt; |
116 | 112 | ||
117 | if (!relay_buf_full(buf)) | 113 | if (!relay_buf_full(buf)) { |
114 | if (!prev_subbuf) { | ||
115 | /* | ||
116 | * executed only once when the channel is opened | ||
117 | * save metadata as first record | ||
118 | */ | ||
119 | subbuf_start_reserve(buf, sizeof(u32)); | ||
120 | *(u32 *)subbuf = 0x12345678; | ||
121 | } | ||
122 | |||
118 | return 1; | 123 | return 1; |
124 | } | ||
119 | 125 | ||
120 | kt = buf->chan->private_data; | 126 | kt = buf->chan->private_data; |
121 | atomic_inc(&kt->lost_records); | 127 | atomic_inc(&kt->lost_records); |