Changeset 19957 in vbox for trunk/src/VBox/HostDrivers/Support

Timestamp:

May 24, 2009 2:47:43 AM (16 years ago)

Author:

vboxsync

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

47659

Message:

VMM,SUPDrv-win,Config.kmk: VBOX_WITH_VMMR0_DISABLE_PREEMPTION

Location:

trunk/src/VBox/HostDrivers/Support

Files:

• Makefile.kmk (modified) (1 diff)
• win/SUPDrv-win.cpp (modified) (2 diffs)

trunk/src/VBox/HostDrivers/Support/Makefile.kmk

@@ -164 +164 @@
 VBoxDrv_DEFS          = IN_RT_R0 IN_SUP_R0 SUPDRV_WITH_RELEASE_LOGGER
 VBoxDrv_DEFS.amd64    = RT_WITH_W64_UNWIND_HACK
+ifdef VBOX_WITH_VMMR0_DISABLE_PREEMPTION
+VBoxDrv_DEFS         += VBOX_WITH_VMMR0_DISABLE_PREEMPTION
+endif
 VBoxDrv_SDKS          = W2K3DDK WINPSDKINCS
 VBoxDrv_INCS         := $(PATH_SUB_CURRENT)

trunk/src/VBox/HostDrivers/Support/win/SUPDrv-win.cpp

@@ -322 +322 @@
         ||  ulCmd == SUP_IOCTL_FAST_DO_NOP)
     {
-        /* Raise the IRQL to DISPATCH_LEVEl to prevent Windows from rescheduling us to another CPU/core. */
+#ifdef VBOX_WITH_VMMR0_DISABLE_PREEMPTION
+        int rc = supdrvIOCtlFast(ulCmd, (unsigned)(uintptr_t)pIrp->UserBuffer /* VMCPU id */, pDevExt, pSession);
+#else
+        /* Raise the IRQL to DISPATCH_LEVEL to prevent Windows from rescheduling us to another CPU/core. */
         Assert(KeGetCurrentIrql() <= DISPATCH_LEVEL);
         KIRQL oldIrql;
@@ -328 +331 @@
         int rc = supdrvIOCtlFast(ulCmd, (unsigned)(uintptr_t)pIrp->UserBuffer /* VMCPU id */, pDevExt, pSession);
         KeLowerIrql(oldIrql);
+#endif
 
         /* Complete the I/O request. */