diff options
| author | Jens Freimann | 2013-07-03 15:18:35 +0200 |
|---|---|---|
| committer | Christian Borntraeger | 2015-03-31 21:07:27 +0200 |
| commit | 6d3da241416e6088f83a7ff1f37fb6bb518d9bc8 (patch) | |
| tree | c10a62568354ed53722f735f8a4ad600d720b177 /arch/s390/kvm/kvm-s390.c | |
| parent | KVM: s390: fix get_all_floating_irqs (diff) | |
| download | kernel-qcow2-linux-6d3da241416e6088f83a7ff1f37fb6bb518d9bc8.tar.gz kernel-qcow2-linux-6d3da241416e6088f83a7ff1f37fb6bb518d9bc8.tar.xz kernel-qcow2-linux-6d3da241416e6088f83a7ff1f37fb6bb518d9bc8.zip | |
KVM: s390: deliver floating interrupts in order of priority
This patch makes interrupt handling compliant to the z/Architecture
Principles of Operation with regard to interrupt priorities.
Add a bitmap for pending floating interrupts. Each bit relates to a
interrupt type and its list. A turned on bit indicates that a list
contains items (interrupts) which need to be delivered. When delivering
interrupts on a cpu we can merge the existing bitmap for cpu-local
interrupts and floating interrupts and have a single mechanism for
delivery.
Currently we have one list for all kinds of floating interrupts and a
corresponding spin lock. This patch adds a separate list per
interrupt type. An exception to this are service signal and machine check
interrupts, as there can be only one pending interrupt at a time.
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index a1308859887d..dbc9ca34d9da 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -31,6 +31,7 @@ #include <asm/pgtable.h> #include <asm/nmi.h> #include <asm/switch_to.h> +#include <asm/isc.h> #include <asm/sclp.h> #include "kvm-s390.h" #include "gaccess.h" @@ -1069,7 +1070,8 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) goto out_err; spin_lock_init(&kvm->arch.float_int.lock); - INIT_LIST_HEAD(&kvm->arch.float_int.list); + for (i = 0; i < FIRQ_LIST_COUNT; i++) + INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); init_waitqueue_head(&kvm->arch.ipte_wq); mutex_init(&kvm->arch.ipte_mutex); |