Re: [PATCH v3 13/18] pnv/xive2: Introduce new capability bits

[Daniel Henrique Barboza]

On 11/26/21 08:53, Cédric Le Goater wrote:
> These bits control the availability of interrupt features : StoreEOI,
> PHB PQ_disable, PHB Address-Based Trigger and the overall XIVE
> exploitation mode. These bits can be set at early boot time of the
> system to activate/deactivate a feature for testing purposes. The
> default value should be '1'.
>
> The 'XIVE exploitation mode' bit is a software bit that skiboot could
> use to disable the XIVE OS interface and propose a P8 style XICS
> interface instead. There are no plans for that for the moment.
>
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>

>   hw/intc/pnv_xive2_regs.h | 5 +++++
>   hw/intc/pnv_xive2.c      | 4 ++--
>   2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/hw/intc/pnv_xive2_regs.h b/hw/intc/pnv_xive2_regs.h
> index 084fccc8d3e9..46d4fb378135 100644
> --- a/hw/intc/pnv_xive2_regs.h
> +++ b/hw/intc/pnv_xive2_regs.h
> @@ -31,6 +31,11 @@
>   #define       CQ_XIVE_CAP_VP_INT_PRIO_8         3
>   #define    CQ_XIVE_CAP_BLOCK_ID_WIDTH           PPC_BITMASK(12, 13)
>   
> +#define    CQ_XIVE_CAP_PHB_PQ_DISABLE           PPC_BIT(56)
> +#define    CQ_XIVE_CAP_PHB_ABT                  PPC_BIT(57)
> +#define    CQ_XIVE_CAP_EXPLOITATION_MODE        PPC_BIT(58)
> +#define    CQ_XIVE_CAP_STORE_EOI                PPC_BIT(59)
> +
>   /* XIVE2 Configuration */
>   #define X_CQ_XIVE_CFG                           0x03
>   #define CQ_XIVE_CFG                             0x018
> diff --git a/hw/intc/pnv_xive2.c b/hw/intc/pnv_xive2.c
> index 186ab66e105d..cb12cea14fc6 100644
> --- a/hw/intc/pnv_xive2.c
> +++ b/hw/intc/pnv_xive2.c
> @@ -1708,9 +1708,9 @@ static const MemoryRegionOps pnv_xive2_nvpg_ops = {
>   };
>   
>   /*
> - * POWER10 default capabilities: 0x2000120076f00000
> + * POWER10 default capabilities: 0x2000120076f000FC
>    */
> -#define PNV_XIVE2_CAPABILITIES  0x2000120076f00000
> +#define PNV_XIVE2_CAPABILITIES  0x2000120076f000FC
>   
>   /*
>    * POWER10 default configuration: 0x0030000033000000