Changeset 109200 in vbox

Timestamp:

May 8, 2025 9:13:54 AM (11 days ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

168776

Message:

SUPDrv/linux: Don't call fpregs_unlock in SUPR0FpuBegin unless the context hook is engaged, since it may do more than just preempt_enable(). bugref:10891

File:

• trunk/src/VBox/HostDrivers/Support/linux/SUPDrv-linux.c (modified) (2 diffs)

trunk/src/VBox/HostDrivers/Support/linux/SUPDrv-linux.c

@@ -1751 +1751 @@
     Assert(fCtxHook || !RTThreadPreemptIsEnabled(NIL_RTTHREAD));
     kernel_fpu_begin();
-#  if 0 /* Always do it for now for better test coverage. */
+#  if RTLNX_VER_MIN(6,15,0) /* fpregs_unlock may do more than just preempt_enable, so only when necessary now. */
     if (fCtxHook)
 #  endif
@@ -1779 +1779 @@
     /* HACK ALERT! See SUPR0FpuBegin for an explanation of this. */
     Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
-#  if 0 /* Always do it for now for better test coverage. */
+#  if RTLNX_VER_MIN(6,15,0) /* fpregs_unlock may do more than just preempt_enable, so only when necessary now. */
     if (fCtxHook)
 #  endif