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KVM: s390: irq routing for adapter interrupts.

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Introduce a new interrupt class for s390 adapter interrupts and enable
irqfds for s390.

This is depending on a new s390 specific vm capability, KVM_CAP_S390_IRQCHIP,
that needs to be enabled by userspace.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Cornelia Huck
2013-07-15 13:36:01 +02:00
parent 841b91c584
commit 8422359877
9 changed files with 209 additions and 5 deletions
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9
arch/s390/include/asm/kvm_host.h
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@@ -24,6 +24,14 @@
#define KVM_MAX_VCPUS 64
#define KVM_USER_MEM_SLOTS 32
/*
* These seem to be used for allocating ->chip in the routing table,
* which we don't use. 4096 is an out-of-thin-air value. If we need
* to look at ->chip later on, we'll need to revisit this.
*/
#define KVM_NR_IRQCHIPS 1
#define KVM_IRQCHIP_NUM_PINS 4096
struct sca_entry {
atomic_t scn;
__u32 reserved;
@@ -274,6 +282,7 @@ struct kvm_arch{
struct kvm_device *flic;
struct gmap *gmap;
int css_support;
int use_irqchip;
struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
};