CR3 vmx allowed

WindowsNT · Jan 21, 2019 · dff3657 · dff3657
1 parent 57b85e1
commit dff3657
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Showing 4 changed files with 17 additions and 8 deletions.
diff --git a/bx_enh_dbg.ini b/bx_enh_dbg.ini
@@ -19,9 +19,9 @@ isLittleEndian = TRUE
 DefaultAsmLines = 512
 DumpWSIndex = 0
 DockOrder = 0x132
-ListWidthPix[0] = 483
-ListWidthPix[1] = 358
-ListWidthPix[2] = 169
+ListWidthPix[0] = 955
+ListWidthPix[1] = 662
+ListWidthPix[2] = 303
 FontName = System
 FontSize = -16
-MainWindow = 208, 208, 1234, 933
+MainWindow = -8, -8, 1928, 1058
diff --git a/dmmic.asm b/dmmic.asm
@@ -355,7 +355,7 @@ mov ebx,0x007
 linear ecx,stx3e,STACKS
 linear edx,v3,T64
 mov esi,2 ; Mode 2 -> Long mode
-;int 0xF0 ; Not working yet because CR3 writing causes VMEXIT
+;int 0xF0 ; Not working yet because MSR writing causes VMEXIT, (we haven't yet defined MSR bitmaps in VMX)
 
 
 

diff --git a/entry.exe b/entry.exe
diff --git a/vmxhost64.asm b/vmxhost64.asm
@@ -87,9 +87,18 @@ RET
 
 VMX_Initialize_VMX_Controls:
     ; edx = 0x82 for unrestricted guestm, 0x2 if simple with EPT
-	vmw32 0x4012,0x11FF ; Entry
-	vmw32 0x4000,0x1F ; PIN
-	vmw32 0x4002,0x8401e9f2; Proc
+
+	vmw32 0x4012,0x11FF ; Entry. Ideally, we must read 0x484 MSR to learn what to put here
+	; bit 9 - Guest is in long mode
+	; bit 10 - Guest is in SMM
+	; bit 11 - Deactivate Dual monitor treatment
+	
+	; We can use also 0x4014 to control MSRs -> if different than the host (mighty)
+
+	vmw32 0x4000,0x1F ; PIN, Intel 3B Chapter 20.6.1
+	; vmw32 0x4002,0x8401e9f2; Proc, Intel 3B Chapter 20.6.2
+	vmw32 0x4002,0x840069F2; Proc, Intel 3B Chapter 20.6.2, Leave CR3 access so we can enable long mode
+
 	vmw32 0x401E,edx
 	vmw32 0x400C,0x36FFF
 RET