On 1/10/2023 8:47 PM, Gupta, Pankaj wrote:
+ *
+ * To make this work the #HV entry code tries its best to pretend it
doesn't use
+ * an IST stack by switching to the task stack if coming from
user-space (which
+ * includes early SYSCALL entry path) or back to the stack in the
IRET frame if
+ * entered from kernel-mode.
+ *
+ * If entered from kernel-mode the return stack is validated first,
and if it is
+ * not safe to use (e.g. because it points to the entry stack) the
#HV handler
+ * will switch to a fall-back stack (HV2) and call a special handler
function.
+ *
+ * The macro is only used for one vector, but it is planned to be
extended in
+ * the future for the #HV exception.
Noticed same comment line in the #VC exception handling section (macro
idtentry_vc). Just wondering we need to remove this line as the patch
being proposed for the #HV exception handling? unless this is planned to
be extended in some other way.
Nice catch! Will remove this in the next version.
Thanks.
