[PATCH] cxl: Set the valid bit in PE for dedicated mode

[Frederic Barrat]

Le 28/08/2017 à 06:15, Vaibhav Jain a écrit :
> Make sure to set the valid-bit in software-state field of the
> populated PE. This was earlier missing for dedicated mode AFUs, hence
> was causing a PSL freeze when the AFU was activated.
> 
> Signed-off-by: Vaibhav Jain <vaibhav at linux.vnet.ibm.com>
> ---

Acked-by: Frederic Barrat <fbarrat at linux.vnet.ibm.com>

Thanks!



>   drivers/misc/cxl/native.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
> index 4a82c313cf71..0e748c682ee9 100644
> --- a/drivers/misc/cxl/native.c
> +++ b/drivers/misc/cxl/native.c
> @@ -897,6 +897,10 @@ int cxl_attach_dedicated_process_psl9(struct cxl_context *ctx, u64 wed, u64 amr)
>   	if (ctx->afu->adapter->native->sl_ops->update_dedicated_ivtes)
>   		afu->adapter->native->sl_ops->update_dedicated_ivtes(ctx);
> 
> +	ctx->elem->software_state = cpu_to_be32(CXL_PE_SOFTWARE_STATE_V);
> +	/* Make sure the changes to the PE are visible to the card */
> +	smp_wmb();
> +
>   	result = cxl_ops->afu_reset(afu);
>   	if (result)
>   		return result;
>