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[Qemu-devel] [PATCH-RFC 02/13] kvm: add API to set ioeventfd
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PATCH-RFC 02/13] kvm: add API to set ioeventfd |
Date: |
Mon, 11 Jan 2010 19:17:03 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
kvm-all.c | 24 ++++++++++++++++++++++++
kvm.h | 3 +++
2 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index a312654..aa00119 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1113,3 +1113,27 @@ 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,
+ };
+ if (!assigned)
+ kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
+ int r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
+ if (r < 0)
+ return r;
+ return 0;
+}
+#else
+int kvm_set_ioeventfd(uint16_t data, uint16_t addr, int fd, bool assigned)
+{
+ return -ENOSYS;
+}
+#endif
diff --git a/kvm.h b/kvm.h
index 672d511..2d723b8 100644
--- a/kvm.h
+++ b/kvm.h
@@ -14,6 +14,7 @@
#ifndef QEMU_KVM_H
#define QEMU_KVM_H
+#include <stdbool.h>
#include "config.h"
#include "qemu-queue.h"
@@ -131,4 +132,6 @@ static inline void cpu_synchronize_state(CPUState *env)
}
}
+int kvm_set_ioeventfd(uint16_t addr, uint16_t data, int fd, bool assigned);
+
#endif
--
1.6.6.rc1.43.gf55cc
- [Qemu-devel] [PATCH-RFC 02/13] kvm: add API to set ioeventfd,
Michael S. Tsirkin <=