Re: [PATCH 02/10] nEPT: MMU context for nested EPT

[Avi Kivity <avi@redhat.com>]

On 11/10/2011 11:58 AM, Nadav Har'El wrote:
> KVM's existing shadow MMU code already supports nested TDP. To use it, we
> need to set up a new "MMU context" for nested EPT, and create a few callbacks
> for it (nested_ept_*()). We then need to switch back and forth between this
> nested context and the regular MMU context when switching between L1 and L2.
>
> +
> +static void nested_ept_inject_page_fault(struct kvm_vcpu *vcpu,
> +	struct x86_exception *fault)
> +{
> +	struct vmcs12 *vmcs12;
> +	nested_vmx_vmexit(vcpu);
> +	vmcs12 = get_vmcs12(vcpu);
> +	/*
> +	 * Note no need to set vmcs12->vm_exit_reason as it is already copied
> +	 * from vmcs02 in nested_vmx_vmexit() above, i.e., EPT_VIOLATION.
> +	 */

Not in all cases.  For example, L0 may emulate an L2 instruction, which
then faults at the EPT level.

> +	vmcs12->exit_qualification = fault->error_code;
> +	vmcs12->guest_physical_address = fault->address;
> +}

What about the guest linear address field?

-- 
error compiling committee.c: too many arguments to function