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/asm/ctlreg.h | |
| 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/asm/ctlreg.h')
| -rw-r--r-- | arch/s390/include/asm/ctlreg.h | 5 |
1 files changed, 3 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 */ |