Merge branches 'for-next/gcs', 'for-next/probes', 'for-next/asm-offsets', 'for-next...

[linux.git] / Documentation / arch / arm64 / elf_hwcaps.rst

diff --git a/Documentation/arch/arm64/elf_hwcaps.rst b/Documentation/arch/arm64/elf_hwcaps.rst
index 694f67fa07d196816b1292e896ebe6a1b599c125..2ff922a406ad83d0dff8104a6e362ac6b02d0e1f 100644 (file)
--- a/Documentation/arch/arm64/elf_hwcaps.rst
+++ b/Documentation/arch/arm64/elf_hwcaps.rst
@@ -16,9 +16,9 @@ architected discovery mechanism available to userspace code at EL0. The
 kernel exposes the presence of these features to userspace through a set
 of flags called hwcaps, exposed in the auxiliary vector.
 
-Userspace software can test for features by acquiring the AT_HWCAP or
-AT_HWCAP2 entry of the auxiliary vector, and testing whether the relevant
-flags are set, e.g.::
+Userspace software can test for features by acquiring the AT_HWCAP,
+AT_HWCAP2 or AT_HWCAP3 entry of the auxiliary vector, and testing
+whether the relevant flags are set, e.g.::
 
        bool floating_point_is_present(void)
        {
@@ -170,6 +170,10 @@ HWCAP_PACG
     ID_AA64ISAR1_EL1.GPI == 0b0001, as described by
     Documentation/arch/arm64/pointer-authentication.rst.
 
+HWCAP_GCS
+    Functionality implied by ID_AA64PFR1_EL1.GCS == 0b1, as
+    described by Documentation/arch/arm64/gcs.rst.
+
 HWCAP2_DCPODP
     Functionality implied by ID_AA64ISAR1_EL1.DPB == 0b0010.