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Diffstat (limited to 'Documentation/riscv/vector.rst')
| -rw-r--r-- | Documentation/riscv/vector.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/riscv/vector.rst b/Documentation/riscv/vector.rst index 48f189d79e41..165b7ed0ac4f 100644 --- a/Documentation/riscv/vector.rst +++ b/Documentation/riscv/vector.rst @@ -130,3 +130,11 @@ processes in form of sysctl knob: Modifying the system default enablement status does not affect the enablement status of any existing process of thread that do not make an execve() call. + +3. Vector Register State Across System Calls +--------------------------------------------- + +As indicated by version 1.0 of the V extension [1], vector registers are +clobbered by system calls. + +1: https://github.com/riscv/riscv-v-spec/blob/master/calling-convention.adoc |