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| author | Dimitris Papastamos <dimitris.papastamos@arm.com> | 2018-03-28 12:06:40 +0100 |
|---|---|---|
| committer | Dimitris Papastamos <dimitris.papastamos@arm.com> | 2018-04-03 16:34:12 +0100 |
| commit | 59dc4ef48757e4de2dc2de13d13e43acd5d91aa0 (patch) | |
| tree | e356c31409aff591dfb75dc127995ab6430b49ea /docs | |
| parent | f11916bf1dfecd7ee76240eebd847681ce366a67 (diff) | |
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>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/cpu-specific-build-macros.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/docs/cpu-specific-build-macros.rst b/docs/cpu-specific-build-macros.rst index 9e11cdff..65f6adb8 100644 --- a/docs/cpu-specific-build-macros.rst +++ b/docs/cpu-specific-build-macros.rst @@ -18,7 +18,11 @@ TF-A exports a series of build flags which control which security 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 ---------------------- |