Changeset 105732 in vbox for trunk/src/VBox

Timestamp:

Aug 19, 2024 5:01:37 PM (7 months ago)

Author:

vboxsync

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

164437

Message:

VMM/CPUM-armv8: Add some helpers tp query current guest EL and whether MMU is enabled, bugref:10388

File:

• trunk/src/VBox/VMM/VMMAll/CPUMAllRegs-armv8.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/CPUMAllRegs-armv8.cpp

@@ -310 +310 @@
  * Get the current exception level of the guest.
  *
- * @returns EL
- * @param   pVCpu       The cross context virtual CPU structure of the calling EMT.
- */
-VMMDECL(uint32_t) CPUMGetGuestEL(PVMCPU pVCpu)
-{
-    RT_NOREF(pVCpu);
-    AssertReleaseFailed();
-    return 0;
+ * @returns Exception Level 0 - 3
+ * @param   pVCpu       The cross context virtual CPU structure of the calling EMT.
+ */
+VMM_INT_DECL(uint8_t) CPUMGetGuestEL(PVMCPU pVCpu)
+{
+    CPUM_INT_ASSERT_NOT_EXTRN(pVCpu, CPUMCTX_EXTRN_PSTATE);
+    return ARMV8_SPSR_EL2_AARCH64_GET_EL(pVCpu->cpum.s.Guest.fPState);
+}
+
+
+/**
+ * Returns whether the guest has the MMU enabled for address translation.
+ *
+ * @returns true if address translation is enabled, false if not.
+ */
+VMM_INT_DECL(bool) CPUMGetGuestMmuEnabled(PVMCPUCC pVCpu)
+{
+    CPUM_INT_ASSERT_NOT_EXTRN(pVCpu, CPUMCTX_EXTRN_PSTATE | CPUMCTX_EXTRN_SCTLR_TCR_TTBR);
+    uint8_t bEl = ARMV8_SPSR_EL2_AARCH64_GET_EL(pVCpu->cpum.s.Guest.fPState);
+    if (bEl == ARMV8_AARCH64_EL_2)
+    {
+        CPUM_INT_ASSERT_NOT_EXTRN(pVCpu, CPUMCTX_EXTRN_SYSREG_EL2);
+        return RT_BOOL(pVCpu->cpum.s.Guest.SctlrEl2.u64 & ARMV8_SCTLR_EL2_M);
+    }
+
+    Assert(bEl == ARMV8_AARCH64_EL_0 || bEl == ARMV8_AARCH64_EL_1);
+    return RT_BOOL(pVCpu->cpum.s.Guest.Sctlr.u64 & ARMV8_SCTLR_EL2_M);
 }