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s390/sclp: detect DIRQ facility

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Detect the adapter CPU directed interruption facility.

Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2019-02-12 12:37:50 +01:00 committed by Martin Schwidefsky
parent c840927cf5
commit 0a9fddfaa8
3 changed files with 3 additions and 1 deletions
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1
arch/s390/include/asm/sclp.h
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@ -81,6 +81,7 @@ struct sclp_info {
unsigned char has_diag318 : 1;
unsigned char has_sipl : 1;
unsigned char has_sipl_g2 : 1;
unsigned char has_dirq : 1;
unsigned int ibc;
unsigned int mtid;
unsigned int mtid_cp;

2
drivers/s390/char/sclp.h
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@ -197,7 +197,7 @@ struct read_info_sccb {
u32 hmfai; /* 124-127 */
u8 _pad_128[134 - 128]; /* 128-133 */
u8 byte_134; /* 134 */
u8 _pad_135; /* 135 */
u8 cpudirq; /* 135 */
u16 cbl; /* 136-137 */
u8 _pad_138[4096 - 138]; /* 138-4095 */
} __packed __aligned(PAGE_SIZE);

1
drivers/s390/char/sclp_early.c
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@ -95,6 +95,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
sclp.hmfai = sccb->hmfai;
sclp.has_dirq = !!(sccb->cpudirq & 0x80);
}
/*