Messages in this thread | | | Subject | Re: [PATCH] KVM: nVMX: VMX instructions: fix segment checks when L1 is in long mode. | From | Paolo Bonzini <> | Date | Thu, 23 Jun 2016 18:03:01 +0200 |
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On 18/06/2016 11:01, Quentin Casasnovas wrote: > Cross-checking the KVM/VMX VMREAD emulation code with the Intel Software > Developper Manual Volume 3C - "VMREAD - Read Field from Virtual-Machine > Control Structure", I found that we're enforcing that the destination > operand is NOT located in a read-only data segment or any code segment when > the L1 is in long mode - BUT that check should only happen when it is in > protected mode. > > Shuffling the code a bit to make our emulation follow the specification > allows me to boot a Xen dom0 in a nested KVM and start HVM L2 guests > without problems.
That's great, and I'm applying the patch, but it's also pretty weird. :) Do you have a pointer to Xen source code that does a VMREAD into a read-only data segment or a code segment?
Thanks,
Paolo
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