[PATCH 01/14] kvm tools: Add is_pio flag to ioeventfd__add_event

[Asias He <asias.hejun@xxxxxxxxx>]

From: Asias He <asias.hejun@xxxxxxxxx>

Add is_pio flag to set KVM_IOEVENTFD_FLAG_PIO. This is useful for
attaching an ioeventfd to MMIO address as well as PIO address.
virtio-mmio needs an ioeventfd to MMIO address.

Signed-off-by: Asias He <asias.hejun@xxxxxxxxx>
---
 tools/kvm/include/kvm/ioeventfd.h |    3 ++-
 tools/kvm/ioeventfd.c             |   19 +++++++++++--------
 tools/kvm/virtio/pci.c            |    2 +-
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/tools/kvm/include/kvm/ioeventfd.h b/tools/kvm/include/kvm/ioeventfd.h
index ec70aa5..70cce9a 100644
--- a/tools/kvm/include/kvm/ioeventfd.h
+++ b/tools/kvm/include/kvm/ioeventfd.h
@@ -4,6 +4,7 @@
 #include <linux/types.h>
 #include <linux/list.h>
 #include <sys/eventfd.h>
+#include "kvm/util.h"
 
 struct kvm;
 
@@ -21,7 +22,7 @@ struct ioevent {
 
 int ioeventfd__init(struct kvm *kvm);
 int ioeventfd__exit(struct kvm *kvm);
-int ioeventfd__add_event(struct ioevent *ioevent);
+int ioeventfd__add_event(struct ioevent *ioevent, bool is_pio);
 int ioeventfd__del_event(u64 addr, u64 datamatch);
 
 #endif
diff --git a/tools/kvm/ioeventfd.c b/tools/kvm/ioeventfd.c
index 9b328cd..97deb06 100644
--- a/tools/kvm/ioeventfd.c
+++ b/tools/kvm/ioeventfd.c
@@ -117,7 +117,7 @@ int ioeventfd__exit(struct kvm *kvm)
 	return 0;
 }
 
-int ioeventfd__add_event(struct ioevent *ioevent)
+int ioeventfd__add_event(struct ioevent *ioevent, bool is_pio)
 {
 	struct kvm_ioeventfd kvm_ioevent;
 	struct epoll_event epoll_event;
@@ -135,13 +135,16 @@ int ioeventfd__add_event(struct ioevent *ioevent)
 	event = new_ioevent->fd;
 
 	kvm_ioevent = (struct kvm_ioeventfd) {
-		.addr			= ioevent->io_addr,
-		.len			= ioevent->io_len,
-		.datamatch		= ioevent->datamatch,
-		.fd			= event,
-		.flags			= KVM_IOEVENTFD_FLAG_PIO | KVM_IOEVENTFD_FLAG_DATAMATCH,
+		.addr		= ioevent->io_addr,
+		.len		= ioevent->io_len,
+		.datamatch	= ioevent->datamatch,
+		.fd		= event,
+		.flags		= KVM_IOEVENTFD_FLAG_DATAMATCH,
 	};
 
+	if (is_pio)
+		kvm_ioevent.flags |= KVM_IOEVENTFD_FLAG_PIO;
+
 	r = ioctl(ioevent->fn_kvm->vm_fd, KVM_IOEVENTFD, &kvm_ioevent);
 	if (r) {
 		r = -errno;
@@ -149,8 +152,8 @@ int ioeventfd__add_event(struct ioevent *ioevent)
 	}
 
 	epoll_event = (struct epoll_event) {
-		.events			= EPOLLIN,
-		.data.ptr		= new_ioevent,
+		.events		= EPOLLIN,
+		.data.ptr	= new_ioevent,
 	};
 
 	r = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, event, &epoll_event);
diff --git a/tools/kvm/virtio/pci.c b/tools/kvm/virtio/pci.c
index 5a3cad8..529e30d 100644
--- a/tools/kvm/virtio/pci.c
+++ b/tools/kvm/virtio/pci.c
@@ -52,7 +52,7 @@ static int virtio_pci__init_ioeventfd(struct kvm *kvm, struct virtio_trans *vtra
 		.fd		= eventfd(0, 0),
 	};
 
-	r = ioeventfd__add_event(&ioevent);
+	r = ioeventfd__add_event(&ioevent, true);
 	if (r)
 		return r;
 
-- 
1.7.7.6

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