From 0a9fddfaa8ea0f66564329ce89390c8dd38b2df0 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 12 Feb 2019 12:37:50 +0100 Subject: [PATCH] s390/sclp: detect DIRQ facility Detect the adapter CPU directed interruption facility. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/sclp.h | 1 + drivers/s390/char/sclp.h | 2 +- drivers/s390/char/sclp_early.c | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index ef5d8fa..f577c5f 100644 --- a/arch/s390/include/asm/sclp.h +++ b/arch/s390/include/asm/sclp.h @@ -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; diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index 287382d..043f32b 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -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); diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c index dae9de3..fdad2a9 100644 --- a/drivers/s390/char/sclp_early.c +++ b/drivers/s390/char/sclp_early.c @@ -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); } /* -- 2.7.4