Changeset 103586 in vbox

Timestamp:

Feb 27, 2024 12:29:53 PM (9 months ago)

Author:

vboxsync

Message:

VMM/CPUM: Expose movbe instruction to the guest if available on the host or we are on arm64 as they are fully implemented in IEM, bugref:9898 bugref:10371

Location:

trunk/src/VBox/VMM/VMMR3

Files:

• CPUM.cpp (modified) (1 diff)
• CPUMR3CpuId.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMR3/CPUM.cpp

@@ -2247 +2247 @@
     pVM->cpum.s.HostFeatures.fSse42      = true;
     pVM->cpum.s.HostFeatures.fLahfSahf   = true;
+    pVM->cpum.s.HostFeatures.fMovBe      = true;
 #endif
 

trunk/src/VBox/VMM/VMMR3/CPUMR3CpuId.cpp

@@ -1403 +1403 @@
                            | PASSTHRU_FEATURE(pConfig->enmSse42, pHstFeat->fSse42, X86_CPUID_FEATURE_ECX_SSE4_2)
                            //| X86_CPUID_FEATURE_ECX_X2APIC - turned on later by the device if enabled.
-                           | PASSTHRU_FEATURE_TODO(pConfig->enmMovBe, X86_CPUID_FEATURE_ECX_MOVBE)
+                           | PASSTHRU_FEATURE(pConfig->enmMovBe, pHstFeat->fMovBe, X86_CPUID_FEATURE_ECX_MOVBE)
                            | PASSTHRU_FEATURE(pConfig->enmPopCnt, pHstFeat->fPopCnt, X86_CPUID_FEATURE_ECX_POPCNT)
                            //| X86_CPUID_FEATURE_ECX_TSCDEADL - not implemented yet.
@@ -2950 +2950 @@
      * unrestricted guest mode.
      */
-    rc = cpumR3CpuIdReadIsaExtCfg(pVM, pIsaExts, "MOVBE", &pConfig->enmMovBe, fNestedPagingAndFullGuestExec);
+    rc = cpumR3CpuIdReadIsaExtCfg(pVM, pIsaExts, "MOVBE", &pConfig->enmMovBe, true);
     AssertLogRelRCReturn(rc, rc);