diff options
| author | Sebastian Ott <sebott@linux.ibm.com> | 2018-09-27 13:57:12 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-29 10:47:01 +0200 |
| commit | e979ce7bced2ee019b5b1a040295484bd7f23680 (patch) | |
| tree | c2c7b88423ea2011ab2bab5fa05f5c393d5b9493 /arch/s390/include/asm/pci.h | |
| parent | 414cbd1e3d14ec0e60666a0fb9d8ae2d77eb7c63 (diff) | |
s390/pci: provide support for CPU directed interrupts
Up until now all interrupts on s390 have been floating. For MSI interrupts
we've used a global summary bit vector (with a bit for each function) and
a per-function interrupt bit vector (with a bit per MSI).
This patch introduces a new IRQ delivery mode: CPU directed interrupts.
In this new mode a per-CPU interrupt bit vector is used (with a bit per
MSI per function). Further it is now possible to direct an IRQ to a
specific CPU so we can finally support IRQ affinity.
If an interrupt can't be delivered because the appointed CPU is occupied
by a hypervisor the interrupt is delivered floating. For this a global
summary bit vector is used (with a bit per CPU).
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/pci.h')
| -rw-r--r-- | arch/s390/include/asm/pci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index 71517451750b..a285754d0742 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -115,6 +115,8 @@ struct zpci_dev { /* IRQ stuff */ u64 msi_addr; /* MSI address */ unsigned int max_msi; /* maximum number of MSI's */ + unsigned int msi_first_bit; + unsigned int msi_nr_irqs; struct airq_iv *aibv; /* adapter interrupt bit vector */ unsigned long aisb; /* number of the summary bit */ |