be->fd = -1;
be->users = 0;
be->owned = true;
- qemu_mutex_init(&be->lock);
}
static void iommufd_backend_finalize(Object *obj)
error_prepend(errp, "Could not parse remote object fd %s:", str);
return;
}
- qemu_mutex_lock(&be->lock);
be->fd = fd;
be->owned = false;
- qemu_mutex_unlock(&be->lock);
trace_iommu_backend_set_fd(be->fd);
}
{
int fd, ret = 0;
- qemu_mutex_lock(&be->lock);
if (be->owned && !be->users) {
fd = qemu_open_old("/dev/iommu", O_RDWR);
if (fd < 0) {
out:
trace_iommufd_backend_connect(be->fd, be->owned,
be->users, ret);
- qemu_mutex_unlock(&be->lock);
return ret;
}
void iommufd_backend_disconnect(IOMMUFDBackend *be)
{
- qemu_mutex_lock(&be->lock);
if (!be->users) {
goto out;
}
}
out:
trace_iommufd_backend_disconnect(be->fd, be->users);
- qemu_mutex_unlock(&be->lock);
}
int iommufd_backend_alloc_ioas(IOMMUFDBackend *be, uint32_t *ioas_id,
#define SYSEMU_IOMMUFD_H
#include "qom/object.h"
-#include "qemu/thread.h"
#include "exec/hwaddr.h"
#include "exec/cpu-common.h"
/*< protected >*/
int fd; /* /dev/iommu file descriptor */
bool owned; /* is the /dev/iommu opened internally */
- QemuMutex lock;
uint32_t users;
/*< public >*/