Triaging old bug tickets ... can you still reproduce this issue with the latest version of QEMU (version 2.9)?
** Changed in: qemu Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1078892 Title: qemu doesn't general protection fault if there are reserved bits set in page-directory-pointer table entries Status in QEMU: Incomplete Bug description: While working on implementing 32-bit PAE mode in a custom operating system, which I was testing in QEMU, I noticed that my OS worked correctly, but resulted in a general protection fault when booted on VMware, VirtualBox, or bochs. According to the Intel Architecture Manual, Volume 3A, Section 4.4.1 "PDPTE Registers", "If any of the PDPTEs sets both the P flag (bit 0) and any reserved bit, the MOV to CR instruction causes a general- protection exception (#GP(0)) and the PDPTEs are not loaded." QEMU does not emulate this behavior. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1078892/+subscriptions