[1/2] arm-bsp/docs: Improve fvp-baser-aemv864 limitation

From: Peter Hoyes <Peter.Hoyes@arm.com>

Add more details about the cache_state_modelled limitation, which can
be worked around by setting cci400.force_on_from_start=1

Issue-Id: SCM-3871
Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
Change-Id: Idde23278a87316dae842c6c3793b9836482e8c3a
---
 meta-arm-bsp/documentation/fvp-baser-aemv8r64.md | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

On 03/03/2022 09:11, Peter Hoyes wrote:
> From: Peter Hoyes <Peter.Hoyes@arm.com>
>
> Add more details about the cache_state_modelled limitation, which can
> be worked around by setting cci400.force_on_from_start=1
>
> Issue-Id: SCM-3871
> Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
> Change-Id: Idde23278a87316dae842c6c3793b9836482e8c3a
> ---
>   meta-arm-bsp/documentation/fvp-baser-aemv8r64.md | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/meta-arm-bsp/documentation/fvp-baser-aemv8r64.md b/meta-arm-bsp/documentation/fvp-baser-aemv8r64.md
> index 85fabe5..44c755e 100644
> --- a/meta-arm-bsp/documentation/fvp-baser-aemv8r64.md
> +++ b/meta-arm-bsp/documentation/fvp-baser-aemv8r64.md
> @@ -217,8 +217,11 @@ Known Issues and Limitations
>   - Only PSCI CPU\_ON and CPU\_OFF functions are supported
>   - Linux kernel does not support booting from secure EL2 on Armv8-R AArch64
>   - Linux KVM does not support Armv8-R AArch64
> -- Enabling the FVP parameter `cache_state_modelled` is incompatible with virtio
> -  devices
> +- Device DMA memory cache-coherence issue: the FVP cache_state_modelled
> +  parameter will affect the cache coherence behavior of peripherals’ DMA. When
> +  users set cache_state_modelled=1, they also have to set
> +  cci400.force_on_from_start=1 to force the FVP to enable snooping on upstream
> +  ports.
>   
>   Change Log
>   ----------

Please can this patch chain also be merged into honister

Regards,

Peter

On Thu, 3 Mar 2022 09:11:43 +0000, Peter Hoyes wrote:
> Add more details about the cache_state_modelled limitation, which can
> be worked around by setting cci400.force_on_from_start=1

Applied, thanks!

[1/2] arm-bsp/docs: Improve fvp-baser-aemv864 limitation
      commit: 1bc6bf2750243dcc9fb4c4ce22590a11c825b167
[2/2] arm/fvp-base-r-aem: Update to version 11.17.21
      commit: dcf114723e38d4413d6c9c0f701114decb0c18cd

Best regards,