Re: [PATCH v8 19/19] hvf: arm: Handle Windows 10 SMC call

[Sergio Lopez]

On Wed, May 19, 2021 at 10:22:53PM +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 patch applied I can successfully boot the current Windows 10
> Insider Preview in HVF.
> 
> Signed-off-by: Alexander Graf <agraf@csgraf.de>
> 
> ---
> 
> v7 -> v8:
> 
>   - fix checkpatch
> ---
>  target/arm/hvf/hvf.c | 4 ++++
>  1 file changed, 4 insertions(+)

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

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