KVM: x86: MOV CR/DR emulation should ignore mod

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MOV CR/DR instructions ignore the mod field (in the ModR/M byte). As the SDM
states: "The 2 bits in the mod field are ignored".  Accordingly, the second
operand of these instructions is always a general purpose register.

The current emulator implementation does not do so. If the mod bits do not
equal 3, it expects the second operand to be in memory.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Nadav Amit 2014-05-25 23:05:21 +03:00 • committed by Paolo Bonzini

parent fc57ac2c9c

commit 9b88ae99d2

1 changed files with 8 additions and 5 deletions

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arch/x86/kvm/emulate.c

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