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kvm: Introduce kvm_irqchip_add_msi_route

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Add a service that establishes a static route from a virtual IRQ line to
an MSI message. Will be used for IRQFD and device assignment. As we will
use this service outside of CONFIG_KVM protected code, stub it properly.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka 2012-05-17 10:32:33 -03:00 committed by Avi Kivity
parent 1df186df35
commit 92b4e48982
3 changed files with 45 additions and 4 deletions
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31
kvm-all.c
View file

@ -1080,6 +1080,32 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
return kvm_irqchip_set_irq(s, route->kroute.gsi, 1);
}
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
{
struct kvm_irq_routing_entry kroute;
int virq;
if (!kvm_irqchip_in_kernel()) {
return -ENOSYS;
}
virq = kvm_irqchip_get_virq(s);
if (virq < 0) {
return virq;
}
kroute.gsi = virq;
kroute.type = KVM_IRQ_ROUTING_MSI;
kroute.flags = 0;
kroute.u.msi.address_lo = (uint32_t)msg.address;
kroute.u.msi.address_hi = msg.address >> 32;
kroute.u.msi.data = msg.data;
kvm_add_routing_entry(s, &kroute);
return virq;
}
#else /* !KVM_CAP_IRQ_ROUTING */
static void kvm_init_irq_routing(KVMState *s)
@ -1090,6 +1116,11 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
{
abort();
}
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
{
abort();
}
#endif /* !KVM_CAP_IRQ_ROUTING */
static int kvm_irqchip_create(KVMState *s)

8
kvm-stub.c
View file

@ -12,10 +12,13 @@
#include "qemu-common.h"
#include "hw/hw.h"
#include "hw/msi.h"
#include "cpu.h"
#include "gdbstub.h"
#include "kvm.h"
KVMState *kvm_state;
int kvm_init_vcpu(CPUArchState *env)
{
return -ENOSYS;
@ -128,3 +131,8 @@ int kvm_on_sigbus(int code, void *addr)
{
return 1;
}
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
{
return -ENOSYS;
}

10
kvm.h
View file

@ -44,6 +44,10 @@ typedef struct KVMCapabilityInfo {
#define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
#define KVM_CAP_LAST_INFO { NULL, 0 }
struct KVMState;
typedef struct KVMState KVMState;
extern KVMState *kvm_state;
/* external API */
int kvm_init(void);
@ -88,10 +92,6 @@ int kvm_on_sigbus(int code, void *addr);
/* internal API */
struct KVMState;
typedef struct KVMState KVMState;
extern KVMState *kvm_state;
int kvm_ioctl(KVMState *s, int type, ...);
int kvm_vm_ioctl(KVMState *s, int type, ...);
@ -213,4 +213,6 @@ int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
uint32_t size);
int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
#endif