linux-kernel - Re: [PATCH 1/3] powerpc/pseries/mm: Introducing FW_FEATURE_BLOCK

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Message-Id: <87lg9solgw.fsf@linux.ibm.com>
Date:   Mon, 30 Jul 2018 19:48:55 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
To:     Laurent Dufour <ldufour@...ux.vnet.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     mpe@...erman.id.au, benh@...nel.crashing.org, paulus@...ba.org,
        npiggin@...il.com
Subject: Re: [PATCH 1/3] powerpc/pseries/mm: Introducing FW_FEATURE_BLOCK_REMOVE

Laurent Dufour <ldufour@...ux.vnet.ibm.com> writes:

> This feature tells if the hcall H_BLOCK_REMOVE is available.
>
> Cc: "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
> Cc: Nicholas Piggin <npiggin@...il.com>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Signed-off-by: Laurent Dufour <ldufour@...ux.vnet.ibm.com>

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>

> ---
>  arch/powerpc/include/asm/firmware.h       | 3 ++-
>  arch/powerpc/platforms/pseries/firmware.c | 1 +
>  2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
> index 535add3f7791..360ba197f9d2 100644
> --- a/arch/powerpc/include/asm/firmware.h
> +++ b/arch/powerpc/include/asm/firmware.h
> @@ -53,6 +53,7 @@
>  #define FW_FEATURE_PRRN		ASM_CONST(0x0000000200000000)
>  #define FW_FEATURE_DRMEM_V2	ASM_CONST(0x0000000400000000)
>  #define FW_FEATURE_DRC_INFO	ASM_CONST(0x0000000800000000)
> +#define FW_FEATURE_BLOCK_REMOVE ASM_CONST(0x0000001000000000)
>  
>  #ifndef __ASSEMBLY__
>  
> @@ -70,7 +71,7 @@ enum {
>  		FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
>  		FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
>  		FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRMEM_V2 |
> -		FW_FEATURE_DRC_INFO,
> +		FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE,
>  	FW_FEATURE_PSERIES_ALWAYS = 0,
>  	FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL,
>  	FW_FEATURE_POWERNV_ALWAYS = 0,
> diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
> index a3bbeb43689e..1624501386f4 100644
> --- a/arch/powerpc/platforms/pseries/firmware.c
> +++ b/arch/powerpc/platforms/pseries/firmware.c
> @@ -65,6 +65,7 @@ hypertas_fw_features_table[] = {
>  	{FW_FEATURE_SET_MODE,		"hcall-set-mode"},
>  	{FW_FEATURE_BEST_ENERGY,	"hcall-best-energy-1*"},
>  	{FW_FEATURE_HPT_RESIZE,		"hcall-hpt-resize"},
> +	{FW_FEATURE_BLOCK_REMOVE,	"hcall-block-remove"},
>  };
>  
>  /* Build up the firmware features bitmask using the contents of
> -- 
> 2.7.4