diff --git a/llvm/docs/CommandGuide/llvm-exegesis.rst b/llvm/docs/CommandGuide/llvm-exegesis.rst
--- a/llvm/docs/CommandGuide/llvm-exegesis.rst
+++ b/llvm/docs/CommandGuide/llvm-exegesis.rst
@@ -34,8 +34,10 @@
 -------------------
 
 :program:`llvm-exegesis` currently only supports X86 (64-bit only), ARM (AArch64
-only), MIPS, and PowerPC (PowerPC64LE only) on Linux. Not all functionality is
-guaranteed to work on every platform.
+only), MIPS, and PowerPC (PowerPC64LE only) on Linux for capture mode (collecting
+performance data). Not all capture mode functionality is guaranteed to work on
+every platform. :program:`llvm-exegesis` also has a separate analysis mode that
+is supported on all platforms that LLVM is.
 
 SNIPPET ANNOTATIONS
 -------------------
diff --git a/llvm/tools/llvm-exegesis/README.md b/llvm/tools/llvm-exegesis/README.md
--- a/llvm/tools/llvm-exegesis/README.md
+++ b/llvm/tools/llvm-exegesis/README.md
@@ -7,17 +7,20 @@
 ### Currently Supported Platforms
 
 `llvm-exegesis` is quite platform-dependent and currently only supports a couple
-platform configurations.
+platform configurations for capture mode. The limiations are listed below.
+`llvm-exegesis` for analysis mode, `llvm-exegesis` is supported on all platforms
+that LLVM itself is supported on.
 
-##### Currently Supported Operating Systems
+#### Currently Supported Operating Systems for Capture Mode
 
-Currently, `llvm-exegesis` only supports Linux. This is mainly due to a
-dependency on the Linux perf subsystem for reading performance counters.
+Currently, `llvm-exegesis` capture mode only supports Linux. This is mainly
+due to a dependency on the Linux perf subsystem for reading performance
+counters.
 
-##### Currently Supported Architectures
-
-Currently, `llvm-exegesis` supports the following architectures:
+#### Currently Supported Architectures for Capture Mode
 
+Currently, `llvm-exegesis` capture mode is supported on the following
+architectures:
 * x86
   * 64-bit only due to this being the only implemented calling convention
     in `llvm-exegesis` currently.
@@ -26,4 +29,5 @@
 * MIPS
 * PowerPC (PowerPC64LE only)
 
-Note that not all functionality is guaranteed to work on all architectures.
+Note that not all capture mode functionality is guaranteed to work on all
+platforms.