[clang] [llvm] [RISCV] QCI Interrupt Support (PR #129957)

[Sam Elliott via cfe-commits]

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@@ -2828,8 +2828,17 @@ targets. This attribute may be attached to a function definition and instructs
 the backend to generate appropriate function entry/exit code so that it can be
 used directly as an interrupt service routine.
 
-Permissible values for this parameter are ``supervisor`` and ``machine``. If
-there is no parameter, then it defaults to ``machine``.
+Permissible values for this parameter are ``supervisor``, ``machine``,
+``qci-nest`` and ``qci-nonest``. If there is no parameter, then it defaults to
+``machine``.
+
+The ``qci-nest`` and ``qci-nonest`` values require the Qualcomm's Xqciint
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lenary wrote:

Done

https://github.com/llvm/llvm-project/pull/129957