================
@@ -1598,38 +1752,55 @@ void
NativeRegisterContextLinux_arm64::ConfigureRegisterContext() {
// If m_sve_state is set to SVEState::Disabled on first stop, code below will
// be deemed non operational for the lifetime of current process.
if (!m_sve_header_is_valid && m_sve_state != SVEState::Disabled) {
- // If we have SVE we may also have the SVE streaming mode that SME added.
- // We can read the header of either mode, but only the active mode will
- // have valid register data.
+ // Systems may have SVE and/or SME. If they are SME only, the SVE regset
+ // cannot be read from but the SME one can. If they have both SVE and SME,
+ // only the active mode will return valid register data.
- // Check whether SME is present and the streaming SVE mode is active.
m_sve_header_is_valid = false;
----------------
omjavaid wrote:
Comment here was removed. Lets add a comment here describing
SVEState::Streaming means SME and we are checking for SME.
https://github.com/llvm/llvm-project/pull/165413
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