Re: [PATCH 01/10] s390/cio: add function chsc_sgib()

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On 25.10.18 14:37, Michael Mueller wrote:
> This patch implements the Set Guest Information Block operation
> to request association or disassociation of a Guest Information
> Block (GIB) with the Adapter Interruption Facility. The operation
> is required to receive GIB alert interrupts for guest adapters
> in conjunction with AIV and GISA.
> 
> Signed-off-by: Michael Mueller <mimu@xxxxxxxxxxxxx>
> Reviewed-by: Sebastian Ott <sebott@xxxxxxxxxxxxx>
> Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
> Acked-by: Halil Pasic <pasic@xxxxxxxxxxxxx>

Acked-by: Janosch Frank <frankja@xxxxxxxxxxxxx>




> ---
>  arch/s390/include/asm/cio.h |  1 +
>  drivers/s390/cio/chsc.c     | 37 +++++++++++++++++++++++++++++++++++++
>  drivers/s390/cio/chsc.h     |  1 +
>  3 files changed, 39 insertions(+)
> 
> diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h
> index 225667652069..1727180e8ca1 100644
> --- a/arch/s390/include/asm/cio.h
> +++ b/arch/s390/include/asm/cio.h
> @@ -331,5 +331,6 @@ extern void css_schedule_reprobe(void);
>  /* Function from drivers/s390/cio/chsc.c */
>  int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta);
>  int chsc_sstpi(void *page, void *result, size_t size);
> +int chsc_sgib(u32 origin);
>  
>  #endif
> diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
> index a0baee25134c..4159c63a5fd2 100644
> --- a/drivers/s390/cio/chsc.c
> +++ b/drivers/s390/cio/chsc.c
> @@ -1382,3 +1382,40 @@ int chsc_pnso_brinfo(struct subchannel_id schid,
>  	return chsc_error_from_response(brinfo_area->response.code);
>  }
>  EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);
> +
> +int chsc_sgib(u32 origin)
> +{
> +	struct {
> +		struct chsc_header request;
> +		u16 op;
> +		u8  reserved01[2];
> +		u8  reserved02:4;
> +		u8  fmt:4;
> +		u8  reserved03[7];
> +		/* operation data area begin */
> +		u8  reserved04[4];
> +		u32 gib_origin;
> +		u8  reserved05[10];
> +		u8  aix;
> +		u8  reserved06[4029];
> +		struct chsc_header response;
> +		u8  reserved07[4];
> +	} *sgib_area;
> +	int ret;
> +
> +	spin_lock_irq(&chsc_page_lock);
> +	memset(chsc_page, 0, PAGE_SIZE);
> +	sgib_area = chsc_page;
> +	sgib_area->request.length = 0x0fe0;
> +	sgib_area->request.code = 0x0021;
> +	sgib_area->op = 0x1;
> +	sgib_area->gib_origin = origin;
> +
> +	ret = chsc(sgib_area);
> +	if (ret == 0)
> +		ret = chsc_error_from_response(sgib_area->response.code);
> +	spin_unlock_irq(&chsc_page_lock);
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(chsc_sgib);
> diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
> index 78aba8d94eec..e57d68e325a3 100644
> --- a/drivers/s390/cio/chsc.h
> +++ b/drivers/s390/cio/chsc.h
> @@ -164,6 +164,7 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp);
>  int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd);
>  int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
>  	      u64 summary_indicator_addr, u64 subchannel_indicator_addr);
> +int chsc_sgib(u32 origin);
>  int chsc_error_from_response(int response);
>  
>  int chsc_siosl(struct subchannel_id schid);
> 


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