Fixup SMCCC_FEATURES return value for SMCCC_ARCH_WORKAROUND_1
Only return -1 if the workaround for CVE-2017-5715 is not compiled in.
Change-Id: I1bd07c57d22b4a13cf51b35be141a1f1ffb065ff
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
diff --git a/docs/cpu-specific-build-macros.rst b/docs/cpu-specific-build-macros.rst
index 9e11cdf..65f6adb 100644
--- a/docs/cpu-specific-build-macros.rst
+++ b/docs/cpu-specific-build-macros.rst
@@ -18,7 +18,11 @@
vulnerability workarounds should be applied at runtime.
- ``WORKAROUND_CVE_2017_5715``: Enables the security workaround for
- `CVE-2017-5715`_. Defaults to 1.
+ `CVE-2017-5715`_. This flag can be set to 0 by the platform if none
+ of the PEs in the system need the workaround. Setting this flag to 0 provides
+ no performance benefit for non-affected platforms, it just helps to comply
+ with the recommendation in the spec regarding workaround discovery.
+ Defaults to 1.
CPU Errata Workarounds
----------------------