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-rw-r--r--docs/tracing.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/tracing.txt b/docs/tracing.txt
index e14bb6d..8c0029b 100644
--- a/docs/tracing.txt
+++ b/docs/tracing.txt
@@ -405,6 +405,9 @@ information. If used together with the "tcg" property, it adds a second
"TCGv_env" argument that must point to the per-target global TCG register that
points to the vCPU when guest code is executed (usually the "cpu_env" variable).
+The "tcg" and "vcpu" properties are currently only honored in the root
+./trace-events file.
+
The following example events:
foo(uint32_t a) "a=%x"