Re: [PATCH 2/4] s390/sclp: Detect ASTFLEIE 2 facility

[Janosch Frank <frankja@linux.ibm.com>]

On 2/12/26 10:24, Christoph Schlameuss wrote:
> From: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
> 
> Detect alternate STFLE interpretive execution facility 2.
> 
> Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
> Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>

Reviewed-by: Janosch Frank <frankja@linux.ibm.com>

> ---
>   arch/s390/include/asm/sclp.h   | 1 +
>   drivers/s390/char/sclp_early.c | 4 +++-
>   2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
> index 0f184dbdbe5e0748fcecbca38b9e55a56968dc79..0f21501d3e866338895caeed385aa4f586384d69 100644
> --- a/arch/s390/include/asm/sclp.h
> +++ b/arch/s390/include/asm/sclp.h
> @@ -104,6 +104,7 @@ struct sclp_info {
>   	unsigned char has_aisii : 1;
>   	unsigned char has_aeni : 1;
>   	unsigned char has_aisi : 1;
> +	unsigned char has_astfleie2 : 1;
>   	unsigned int ibc;
>   	unsigned int mtid;
>   	unsigned int mtid_cp;
> diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
> index 6bf501ad8ff0ea6d3df0a721f29fd24506409493..22dd797e62291fef087d46ac1c7f805486e3935b 100644
> --- a/drivers/s390/char/sclp_early.c
> +++ b/drivers/s390/char/sclp_early.c
> @@ -61,8 +61,10 @@ static void __init sclp_early_facilities_detect(void)
>   		sclp.has_sipl = !!(sccb->cbl & 0x4000);
>   		sclp.has_sipl_eckd = !!(sccb->cbl & 0x2000);
>   	}
> -	if (sccb->cpuoff > 139)
> +	if (sccb->cpuoff > 139) {
>   		sclp.has_diag324 = !!(sccb->byte_139 & 0x80);
> +		sclp.has_astfleie2 = !!(sccb->byte_139 & 0x40);
> +	}
>   	sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
>   	sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
>   	sclp.rzm <<= 20;
>