Changeset 87361 in vbox for trunk/src/VBox/VMM/VMMRZ

Timestamp:

Jan 21, 2021 9:13:55 PM (4 years ago)

Author:

vboxsync

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

142342

Message:

VMM/CPUM,HMSVM: Mirror the state of fUseFlags[CPUM_USED_FPU_GUEST] in CPUMCTX::fUsedFpuGuest so the HM switcher code can get at it (only relevant for windows) and avoid a call to CPUMIsGuestFPUStateActive/Loaded.

Location:

trunk/src/VBox/VMM/VMMRZ

Files:

• CPUMRZ.cpp (modified) (3 diffs)
• CPUMRZA.asm (modified) (1 diff)

trunk/src/VBox/VMM/VMMRZ/CPUMRZ.cpp

@@ -99 +99 @@
     if (pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST)
     {
+        Assert(pVCpu->cpum.s.Guest.fUsedFpuGuest);
         cpumRZSaveGuestFpuState(&pVCpu->cpum.s, false /*fLeaveFpuAccessible*/);
         pVCpu->cpum.s.fUseFlags |= CPUM_USED_FPU_GUEST;
+        pVCpu->cpum.s.Guest.fUsedFpuGuest = true;
         Log7(("CPUMRZFpuStateActualizeForRead\n"));
     }
@@ -120 +122 @@
     if (pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST)
     {
+        Assert(pVCpu->cpum.s.Guest.fUsedFpuGuest);
         cpumRZSaveGuestSseRegisters(&pVCpu->cpum.s);
         Log7(("CPUMRZFpuStateActualizeSseForRead\n"));
@@ -138 +141 @@
     if (pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST)
     {
+        Assert(pVCpu->cpum.s.Guest.fUsedFpuGuest);
         cpumRZSaveGuestAvxRegisters(&pVCpu->cpum.s);
         Log7(("CPUMRZFpuStateActualizeAvxForRead\n"));

trunk/src/VBox/VMM/VMMRZ/CPUMRZA.asm

@@ -211 +211 @@
 
         and     dword [pCpumCpu + CPUMCPU.fUseFlags], ~CPUM_USED_FPU_GUEST
+        mov     byte [pCpumCpu + CPUMCPU.Guest.fUsedFpuGuest], 0
  %ifdef IN_RC
         test    byte [ebp + 0ch], 1     ; fLeaveFpuAccessible