Re: [PATCH v5] x86/vmx: add hvm functions to get/set non-register state

[Tamas K Lengyel <tamas@xxxxxxxxxxxxx>]

On Fri, Mar 25, 2022 at 9:34 AM Tamas K Lengyel <tamas.lengyel@xxxxxxxxx> wrote:
>
> During VM forking and resetting a failed vmentry has been observed due
> to the guest non-register state going out-of-sync with the guest register
> state. For example, a VM fork reset right after a STI instruction can trigger
> the failed entry. This is due to the guest non-register state not being saved
> from the parent VM, thus the reset operation only copies the register state.
>
> Fix this by adding a new pair of hvm functions to get/set the guest
> non-register state so that the overall vCPU state remains in sync.
>
> Signed-off-by: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx>
> ---
> v5: Switch to internal-only hvm funcs instead of adding to hvm_hw_cpu

Patch ping.