@@ -1113,3 +1113,23 @@ void kvm_remove_all_breakpoints(CPUState *current_env)
{
}
#endif /* !KVM_CAP_SET_GUEST_DEBUG */
+
+#ifdef KVM_IOEVENTFD
+int kvm_set_ioeventfd(uint16_t addr, uint16_t data, int fd, bool assigned)
+{
+ struct kvm_ioeventfd kick = {
+ .datamatch = data,
+ .addr = addr,
+ .len = 2,
+ .flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO,
+ .fd = fd,
+ };
+ int r;
+ if (!assigned)
+ kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
+ r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
+ if (r < 0)
+ return r;
+ return 0;
+}
+#endif
@@ -14,10 +14,16 @@
#ifndef QEMU_KVM_H
#define QEMU_KVM_H
+#include <stdbool.h>
+#include <errno.h>
#include "config.h"
#include "qemu-queue.h"
#ifdef CONFIG_KVM
+#include <linux/kvm.h>
+#endif
+
+#ifdef CONFIG_KVM
extern int kvm_allowed;
#define kvm_enabled() (kvm_allowed)
@@ -131,4 +137,14 @@ static inline void cpu_synchronize_state(CPUState *env)
}
}
+#if defined(KVM_IOEVENTFD) && defined(CONFIG_KVM)
+int kvm_set_ioeventfd(uint16_t addr, uint16_t data, int fd, bool assigned);
+#else
+static inline
+int kvm_set_ioeventfd(uint16_t data, uint16_t addr, int fd, bool assigned)
+{
+ return -ENOSYS;
+}
+#endif
+
#endif
This adds API to set ioeventfd to kvm, as well as stubs for non-eventfd case, making it possible for users to use this API without ifdefs. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- kvm-all.c | 20 ++++++++++++++++++++ kvm.h | 16 ++++++++++++++++ 2 files changed, 36 insertions(+), 0 deletions(-)