On 3/31/2023 11:57 PM, Borislav Petkov wrote:
+ *
+ * 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.
+ */
+.macro idtentry_hv vector asmsym cfunc
+SYM_CODE_START(\asmsym)
...
why is this so much duplicated code instead of sharing it with
idtentry_vc and all the facilities it does?
Hi Boris:
#VC and #HV use different stack. I try reusing vc code path for #HV
doesn't work. I will continue to work on this direction and report back
later. In the RFC v4, I still keep the old version and other patches may
be reviewed in the parellel.
Thanks.
