KVM: SVM: Add emulation support for #GP triggered by SVM instructions

While running SVM related instructions (VMRUN/VMSAVE/VMLOAD), some AMD
CPUs check EAX against reserved memory regions (e.g. SMM memory on host)
before checking VMCB's instruction intercept. If EAX falls into such
memory areas, #GP is triggered before VMEXIT. This causes problem under
nested virtualization. To solve this problem, KVM needs to trap #GP and
check the instructions triggering #GP. For VM execution instructions,
KVM emulates these instructions.

Co-developed-by: Wei Huang <[email protected]>
Signed-off-by: Wei Huang <[email protected]>
Signed-off-by: Bandan Das <[email protected]>
Message-Id: <[email protected]>
[Conditionally enable #GP intercept. - Paolo]
Signed-off-by: Paolo Bonzini <[email protected]>

0 files changed, 0 insertions, 0 deletions