Changeset 95088 in vbox for trunk/src/VBox/VMM/VMMR0

Timestamp:

May 25, 2022 6:58:51 AM (3 years ago)

Author:

vboxsync

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

151561

Message:

VMM: bugref:10209 Call support driver FPU begin/end operations from VMM R0.

File:

• trunk/src/VBox/VMM/VMMR0/CPUMR0.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMR0/CPUMR0.cpp

@@ -520 +520 @@
     Assert(!(pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST));
 
+    /* Notify the support driver prior to loading the guest-FPU register state. */
+    SUPR0FpuBegin(false /* unused */);
+
     if (!pVM->cpum.s.HostFeatures.fLeakyFxSR)
     {
@@ -565 +568 @@
     if (pVCpu->cpum.s.fUseFlags & (CPUM_USED_FPU_GUEST | CPUM_USED_FPU_HOST))
     {
+        /* Notify the support driver prior to loading the host-FPU register state. */
+        SUPR0FpuEnd(false /* unused */);
+
         fSavedGuest = RT_BOOL(pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST);
         Assert(fSavedGuest == pVCpu->cpum.s.Guest.fUsedFpuGuest);