On Wed, May 19, 2021 at 10:22:52PM +0200, Alexander Graf wrote:
> Windows 10 calls an SMCCC call via SMC unconditionally on boot. It lives
> in the trusted application call number space, but its purpose is unknown.
> 
> In our current SMC implementation, we inject a UDEF for unknown SMC calls,
> including this one. However, Windows breaks on boot when we do this. Instead,
> let's return an error code.
> 
> With this and -M virt,virtualization=on I can successfully boot the current
> Windows 10 Insider Preview in TCG.
> 
> Signed-off-by: Alexander Graf <agraf@csgraf.de>
> ---
>  target/arm/kvm-consts.h | 2 ++
>  target/arm/psci.c       | 2 ++
>  2 files changed, 4 insertions(+)

Reviewed-by: Sergio Lopez <slp@redhat.com>