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@xxxxxxxxxx>
---
kvm-all.c | 20 ++++++++++++++++++++
kvm.h | 16 ++++++++++++++++
2 files changed, 36 insertions(+), 0 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 51273e4..6dbe480 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1134,4 +1134,24 @@ 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
+
#include "qemu-kvm.c"
diff --git a/kvm.h b/kvm.h
index 7b33177..365d8b1 100644
--- a/kvm.h
+++ b/kvm.h
@@ -14,6 +14,8 @@
#ifndef QEMU_KVM_H
#define QEMU_KVM_H
+#include <stdbool.h>
+#include <errno.h>
#include "config.h"
#include "qemu-queue.h"
#include "qemu-kvm.h"
@@ -21,6 +23,10 @@
#ifdef KVM_UPSTREAM
#ifdef CONFIG_KVM
+#include <linux/kvm.h>
+#endif
+
+#ifdef CONFIG_KVM
extern int kvm_allowed;
#define kvm_enabled() (kvm_allowed)
@@ -143,4 +149,14 @@ static inline void cpu_synchronize_state(CPUState *env)
#endif
+#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
--
1.6.6.144.g5c3af
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