linux-kernel - Re: [PATCH 03/32] s390/sclp: detect the AENI facility

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Date:   Wed, 8 Dec 2021 14:08:13 +0100
From:   Claudio Imbrenda <imbrenda@...ux.ibm.com>
To:     Matthew Rosato <mjrosato@...ux.ibm.com>
Cc:     linux-s390@...r.kernel.org, alex.williamson@...hat.com,
        cohuck@...hat.com, schnelle@...ux.ibm.com, farman@...ux.ibm.com,
        pmorel@...ux.ibm.com, borntraeger@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, gerald.schaefer@...ux.ibm.com,
        agordeev@...ux.ibm.com, frankja@...ux.ibm.com, david@...hat.com,
        vneethv@...ux.ibm.com, oberpar@...ux.ibm.com, freude@...ux.ibm.com,
        thuth@...hat.com, pasic@...ux.ibm.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/32] s390/sclp: detect the AENI facility

On Tue,  7 Dec 2021 15:57:14 -0500
Matthew Rosato <mjrosato@...ux.ibm.com> wrote:

> Detect the Adapter Event Notification Interpretation facility.
> 
> Reviewed-by: Eric Farman <farman@...ux.ibm.com>
> Signed-off-by: Matthew Rosato <mjrosato@...ux.ibm.com>

Reviewed-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>

> ---
>  arch/s390/include/asm/sclp.h   | 1 +
>  drivers/s390/char/sclp_early.c | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
> index 524a99baf221..a763563bb3e7 100644
> --- a/arch/s390/include/asm/sclp.h
> +++ b/arch/s390/include/asm/sclp.h
> @@ -90,6 +90,7 @@ struct sclp_info {
>  	unsigned char has_dirq : 1;
>  	unsigned char has_zpci_interp : 1;
>  	unsigned char has_aisii : 1;
> +	unsigned char has_aeni : 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 a73120b8a5de..52a203ea23cc 100644
> --- a/drivers/s390/char/sclp_early.c
> +++ b/drivers/s390/char/sclp_early.c
> @@ -46,6 +46,7 @@ static void __init sclp_early_facilities_detect(void)
>  	sclp.has_hvs = !!(sccb->fac119 & 0x80);
>  	sclp.has_kss = !!(sccb->fac98 & 0x01);
>  	sclp.has_aisii = !!(sccb->fac118 & 0x40);
> +	sclp.has_aeni = !!(sccb->fac118 & 0x20);
>  	sclp.has_zpci_interp = !!(sccb->fac118 & 0x01);
>  	if (sccb->fac85 & 0x02)
>  		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;