[PATCH] cxl: Configure PSL to not use APC virtual machines

[christophe lombard]

Le 17/04/2018 à 07:11, Vaibhav Jain a écrit :
> APC virtual machines arent used on POWER-9 chips and are already
> disabled in on-chip CAPP. They also need to be disabled on the PSL via
> 'PSL Data Send Control Register' by setting bit(47). This forces the
> PSL to send commands to CAPP with queue.id == 0.
> 
> Signed-off-by: Vaibhav Jain <vaibhav at linux.vnet.ibm.com>
> ---
>   drivers/misc/cxl/pci.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
> index c32432168e6b..af30ee848d35 100644
> --- a/drivers/misc/cxl/pci.c
> +++ b/drivers/misc/cxl/pci.c
> @@ -516,9 +516,9 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter,
>   	cxl_p1_write(adapter, CXL_PSL9_FIR_CNTL, psl_fircntl);
> 
>   	/* Setup the PSL to transmit packets on the PCIe before the
> -	 * CAPP is enabled
> +	 * CAPP is enabled. Make sure that CAPP virtual machines are disabled
>   	 */
> -	cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000002A10ULL);
> +	cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000012A10ULL);
> 
>   	/*
>   	 * A response to an ASB_Notify request is returned by the
> 

Thanks

Reviewed-by: Christophe Lombard <clombard at linux.vnet.ibm.com>