Re: [PATCH edk2-non-osi 2/2] Silicon/AMD/Styx: update ArmTrustedFirmware.bin

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

On 1 February 2018 at 16:04, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
> The ARM Trusted Firmware build we have been using up until now was built
> with optimizations disabled (which means every variable manipulation
> involves a load, the operation itself and a store), and runs with the
> MMU disabled, making it needlessly slow.
>
> This appears to be due to the fact that
> a) the page tables are not set up correctly, so not all memory can be
>    accessed from EL3
> b) the handling of SMC service calls does not take into account that
>    these calls may be made with the MMU off (e.g., by UEFI PEI).
>
> These issues have been fixed in the source code, which should hopefully
> remove any performance bottlenecks that may become more noticeable now
> that we are going to call into the secure firmware more often to perform
> Spectre variant 2 mitigations, which have been backported as well.
>
> So update the binary image to a RELEASE build that was created with
> optimizations enabled, and has the above fixes incorporated.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
>  Silicon/AMD/Styx/ArmTrustedFirmware.bin | Bin 75344 -> 34320 bytes
>  1 file changed, 0 insertions(+), 0 deletions(-)
>

Note to Marc: this is the exact image I shared with you as
bl31.bin-release earlier today, so if that works as expected, could
you report back here please? Thanks.