Changeset 76548 in vbox

Timestamp:

Dec 31, 2018 4:05:16 AM (6 years ago)

Author:

vboxsync

Message:

VMM/CPUM: Add functions for getting guest CR0, CR4 valid bits mask, in preparation for upcoming changes to nested VMX code.

Location:

trunk

Files:

trunk/include/VBox/vmm/cpum.h

-              r76507
+              r76548
 VMM_INT_DECL(void)     CPUMSetGuestSpecCtrl(PVMCPU pVCpu, uint64_t uValue);
 VMM_INT_DECL(uint64_t) CPUMGetGuestSpecCtrl(PVMCPU pVCpu);
+VMM_INT_DECL(uint64_t) CPUMGetGuestCR4ValidMask(PVM pVM);
 /** @} */
 …
 #ifndef IPRT_WITHOUT_NAMED_UNIONS_AND_STRUCTS
+/**
+ * Gets valid CR0 bits for the guest.
+ *
+ * @returns Valid CR0 bits.
+ */
+DECLINLINE(uint64_t) CPUMGetGuestCR0ValidMask(void)
+{
+    return (  X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS
+            | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM
+            | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG);
+}
 /**

-              r75831
+              r76548
+}
+/**
+ * Gets valid CR4 bits for the guest.
+ *
+ * @returns Valid CR4 bits.
+ * @param   pVM     The cross context VM structure.
+ */
+VMM_INT_DECL(uint64_t) CPUMGetGuestCR4ValidMask(PVM pVM)
+{
+    PCCPUMFEATURES pGuestFeatures = &pVM->cpum.s.GuestFeatures;
+    uint64_t fMask = X86_CR4_VME | X86_CR4_PVI
+                   | X86_CR4_TSD | X86_CR4_DE
+                   | X86_CR4_PSE | X86_CR4_PAE
+                   | X86_CR4_MCE | X86_CR4_PGE
+                   | X86_CR4_PCE
+                   | X86_CR4_OSXMMEEXCPT;  /** @todo r=ramshankar: Introduced in Pentium III along with SSE. Check fSse here? */
+    if (pGuestFeatures->fFxSaveRstor)
+        fMask |= X86_CR4_OSFXSR;
+    if (pGuestFeatures->fVmx)
+        fMask |= X86_CR4_VMXE;
+    if (pGuestFeatures->fXSaveRstor)
+        fMask |= X86_CR4_OSXSAVE;
+    if (pGuestFeatures->fPcid)
+        fMask |= X86_CR4_PCIDE;
+    if (pGuestFeatures->fFsGsBase)
+        fMask |= X86_CR4_FSGSBASE;
+    return fMask;
+}

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