[Qemu-devel] [PATCH v5 3/5] Add functions for assigning ioeventfd and irqfds.

[Cam Macdonell <cam@cs.ualberta.ca>]

Generic functions to assign irqfds and ioeventfds.

---
 kvm-all.c |   44 ++++++++++++++++++++++++++++++++++++++++++++
 kvm.h     |   14 ++++++++++++++
 2 files changed, 58 insertions(+), 0 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c
index fb8d4b8..d5c7775 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1193,6 +1193,50 @@ int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset)
 }
 
 #ifdef KVM_IOEVENTFD
+int kvm_set_irqfd(int fd, uint16_t vector, uint32_t gsi)
+{
+    struct kvm_irqfd call = { };
+    int r;
+
+    call.fd = fd;
+    call.gsi = gsi;
+
+    if (!kvm_enabled())
+        return -ENOSYS;
+    r = kvm_vm_ioctl(kvm_state, KVM_IRQFD, &call);
+
+    if (r < 0) {
+        return r;
+    }
+    return 0;
+}
+
+int kvm_set_ioeventfd_mmio_long(int fd, uint32_t addr, uint32_t val, bool assign)
+{
+
+    int ret;
+    struct kvm_ioeventfd iofd;
+
+    iofd.datamatch = val;
+    iofd.addr = addr;
+    iofd.len = 4;
+    iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH;
+    iofd.fd = fd;
+
+    if (!kvm_enabled())
+        return -ENOSYS;
+    if (!assign)
+        iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
+
+    ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd);
+
+    if (ret < 0) {
+        return ret;
+    }
+
+    return 0;
+}
+
 int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
 {
     struct kvm_ioeventfd kick = {
diff --git a/kvm.h b/kvm.h
index c63e314..831d68f 100644
--- a/kvm.h
+++ b/kvm.h
@@ -174,9 +174,23 @@ static inline void cpu_synchronize_post_init(CPUState *env)
 }
 
 #if defined(KVM_IOEVENTFD) && defined(CONFIG_KVM)
+int kvm_set_irqfd(int fd, uint16_t vector, uint32_t gsi);
+int kvm_set_ioeventfd_mmio_long(int fd, uint32_t adr, uint32_t val, bool assign);
 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
 #else
 static inline
+int kvm_set_irqfd(PCIDevice* pdev, uint16_t vector, int fd)
+{
+    return -ENOSYS;
+}
+
+static inline
+int kvm_set_ioeventfd_mmio_long(int fd, uint16_t adr, uint16_t val, bool assign)
+{
+    return -ENOSYS;
+}
+
+static inline
 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign)
 {
     return -ENOSYS;
-- 
1.6.2.5