Re: [Xen-devel] [PATCH RFC 2/2] xen/pvh: enable mmu_update hypercall

[Tim Deegan <tim@xxxxxxx>]

At 12:53 +0200 on 15 Oct (1413374025), Roger Pau Monne wrote:
> This is needed for performing save/restore of PV guests.

On IRC I suggested that this would be OK as long as there were other
checks to make sure that the target of all these ops is PV (in
particular that a PVH/HVM guest can't end up calling PV MM operations
on itself).

Did it turn out that all those checks are already there?

Tim.

> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> Cc: Tim Deegan <tim@xxxxxxx>
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> ---
>  xen/arch/x86/hvm/hvm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
> index f0e1edc..cf84e49 100644
> --- a/xen/arch/x86/hvm/hvm.c
> +++ b/xen/arch/x86/hvm/hvm.c
> @@ -4804,6 +4804,7 @@ static hvm_hypercall_t *const 
> pvh_hypercall64_table[NR_hypercalls] = {
>      [ __HYPERVISOR_grant_table_op ]  = (hvm_hypercall_t *)hvm_grant_table_op,
>      HYPERCALL(vcpu_op),
>      HYPERCALL(mmuext_op),
> +    HYPERCALL(mmu_update),
>      HYPERCALL(xsm_op),
>      HYPERCALL(sched_op),
>      HYPERCALL(event_channel_op),
> --
> 1.9.3 (Apple Git-50)
> 

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