HWVMXR0.cpp

Timestamp:

Apr 3, 2008 9:54:12 AM (17 years ago)

Author:

vboxsync

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

29249

Message:

Some write protect changes

File:

trunk/src/VBox/VMM/VMMR0/HWVMXR0.cpp

-              r7500
+              r7717
         /* Note: protected mode & paging are always enabled; we use them for emulating real and protected mode without paging too. */
         val |= X86_CR0_PE | X86_CR0_PG;
+        /* Note: We must also set this as we rely on protecting various pages for which supervisor writes must be caught. */
+        val |= X86_CR0_WP;
         rc |= VMXWriteVMCS(VMX_VMCS_GUEST_CR0,              val);
 …
          */
         val =   X86_CR0_PE  /* Must monitor this bit (assumptions are made for real mode emulation) */
               | X86_CR0_WP  /** @todo do we care? (we do if we start patching the guest) */
+              | X86_CR0_WP  /* Must monitor this bit (it must always be enabled). */
               | X86_CR0_PG  /* Must monitor this bit (assumptions are made for real mode & protected mode without paging emulation) */
               | X86_CR0_TS

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