diff options
| author | Tobias Huschle <huschle@linux.ibm.com> | 2024-08-12 13:39:27 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2024-08-29 22:56:34 +0200 |
| commit | 2c6c9ccc76434d5609300aa578a4737e1686b320 (patch) | |
| tree | 12d5ebc7d5b121569eb3617549a844b188a595de /arch/s390/include | |
| parent | 324db0faf8e1cbfde7a033e77f674f2bb819b54e (diff) | |
s390/wti: Introduce infrastructure for warning track interrupt
The warning-track interrupt (wti) provides a notification that the
receiving CPU will be pre-empted from its physical CPU within a short
time frame. This time frame is called grace period and depends on the
machine type. Giving up the CPU on time may prevent a task to get stuck
while holding a resource.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Mete Durlu <meted@linux.ibm.com>
Signed-off-by: Tobias Huschle <huschle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/ctlreg.h | 5 | ||||
| -rw-r--r-- | arch/s390/include/asm/diag.h | 9 | ||||
| -rw-r--r-- | arch/s390/include/asm/irq.h | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/sclp.h | 1 |
4 files changed, 15 insertions, 2 deletions
diff --git a/arch/s390/include/asm/ctlreg.h b/arch/s390/include/asm/ctlreg.h index 72a9556d04f3..e6527f51ad0b 100644 --- a/arch/s390/include/asm/ctlreg.h +++ b/arch/s390/include/asm/ctlreg.h @@ -202,8 +202,9 @@ union ctlreg0 { unsigned long : 3; unsigned long ccc : 1; /* Cryptography counter control */ unsigned long pec : 1; /* PAI extension control */ - unsigned long : 17; - unsigned long : 3; + unsigned long : 15; + unsigned long wti : 1; /* Warning-track */ + unsigned long : 4; unsigned long lap : 1; /* Low-address-protection control */ unsigned long : 4; unsigned long edat : 1; /* Enhanced-DAT-enablement control */ diff --git a/arch/s390/include/asm/diag.h b/arch/s390/include/asm/diag.h index c0d43512f4fc..e1316e181230 100644 --- a/arch/s390/include/asm/diag.h +++ b/arch/s390/include/asm/diag.h @@ -38,6 +38,7 @@ enum diag_stat_enum { DIAG_STAT_X308, DIAG_STAT_X318, DIAG_STAT_X320, + DIAG_STAT_X49C, DIAG_STAT_X500, NR_DIAG_STAT }; @@ -363,4 +364,12 @@ void _diag0c_amode31(unsigned long rx); void _diag308_reset_amode31(void); int _diag8c_amode31(struct diag8c *addr, struct ccw_dev_id *devno, size_t len); +/* diag 49c subcodes */ +enum diag49c_sc { + DIAG49C_SUBC_ACK = 0, + DIAG49C_SUBC_REG = 1 +}; + +int diag49c(unsigned long subcode); + #endif /* _ASM_S390_DIAG_H */ diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h index 54b42817f70a..d9e705f4a697 100644 --- a/arch/s390/include/asm/irq.h +++ b/arch/s390/include/asm/irq.h @@ -47,6 +47,7 @@ enum interruption_class { IRQEXT_CMS, IRQEXT_CMC, IRQEXT_FTP, + IRQEXT_WTI, IRQIO_CIO, IRQIO_DAS, IRQIO_C15, @@ -99,6 +100,7 @@ int unregister_external_irq(u16 code, ext_int_handler_t handler); enum irq_subclass { IRQ_SUBCLASS_MEASUREMENT_ALERT = 5, IRQ_SUBCLASS_SERVICE_SIGNAL = 9, + IRQ_SUBCLASS_WARNING_TRACK = 33, }; #define CR0_IRQ_SUBCLASS_MASK \ diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index da3dad18fe50..eb00fa1771da 100644 --- a/arch/s390/include/asm/sclp.h +++ b/arch/s390/include/asm/sclp.h @@ -72,6 +72,7 @@ struct sclp_info { unsigned char has_core_type : 1; unsigned char has_sprp : 1; unsigned char has_hvs : 1; + unsigned char has_wti : 1; unsigned char has_esca : 1; unsigned char has_sief2 : 1; unsigned char has_64bscao : 1; |