Re: [PATCH 11/26] runstate: skip initial CPU reset if reset is not actually possible

[Philippe Mathieu-Daudé]

On 22/3/24 19:11, Paolo Bonzini wrote:
> Right now, the system reset is concluded by a call to
> cpu_synchronize_all_post_reset() in order to sync any changes
> that the machine reset callback applied to the CPU state.
>
> However, for VMs with encrypted state such as SEV-ES guests (currently
> the only case of guests with non-resettable CPUs) this cannot be done,
> because guest state has already been finalized by machine-init-done notifiers.
> cpu_synchronize_all_post_reset() does nothing on these guests, and actually
> we would like to make it fail if called once guest has been encrypted.
> So, assume that boards that support non-resettable CPUs do not touch
> CPU state and that all such setup is done before, at the time of
> cpu_synchronize_all_post_init().
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>   system/runstate.c | 15 ++++++++++++++-
>   roms/edk2         |  2 +-
Without submodule change:
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

>   2 files changed, 15 insertions(+), 2 deletions(-)