On Thu, Jan 15, 2026 at 4:29 AM Penny Zheng <[email protected]> wrote:
> File hvm/vm_event.c and x86/vm_event.c are the extend to vm_event handling
> routines, and its compilation shall be guarded by CONFIG_VM_EVENT too.
>
> Although CONFIG_VM_EVENT is right now forcibly enabled on x86 via
> MEM_ACCESS_ALWAYS_ON, we could disable it through disabling
> CONFIG_MGMT_HYPERCALLS later. So we remove MEM_ACCESS_ALWAYS_ON and
> make VM_EVENT=y on default only on x86 to retain the same.
>
> The following functions are developed on the basis of vm event framework,
> or
> only invoked by vm_event.c, so they all shall be wrapped with
> CONFIG_VM_EVENT
> (otherwise they will become unreachable and
> violate Misra rule 2.1 when VM_EVENT=n):
> - hvm_toggle_singlestep
> - hvm_fast_singlestep
> - hvm_emulate_one_vm_event
> -
> hvmemul_write{,cmpxchg,rep_ins,rep_outs,rep_movs,rep_stos,read_io,write_io}_discard
> And Function vm_event_check_ring() needs stub to pass compilation when
> VM_EVENT=n.
>
> Signed-off-by: Penny Zheng <[email protected]>
> Acked-by: Jan Beulich <[email protected]>
> Reviewed-by: Jason Andryuk <[email protected]>
>
Acked-by: Tamas K Lengyel <[email protected]>
