Signed-off-by: Sasha Levin <[email protected]>
---
tools/kvm/virtio/rng.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/virtio/rng.c b/tools/kvm/virtio/rng.c
index 5f29ded..a540e2e 100644
--- a/tools/kvm/virtio/rng.c
+++ b/tools/kvm/virtio/rng.c
@@ -11,6 +11,7 @@
#include "kvm/threadpool.h"
#include "kvm/irq.h"
#include "kvm/ioeventfd.h"
+#include "kvm/guest_compat.h"
#include <linux/virtio_ring.h>
#include <linux/virtio_rng.h>
@@ -41,6 +42,7 @@ struct rng_dev {
int fd;
u32 vq_vector[NUM_VIRT_QUEUES];
u32 msix_io_block;
+ int compat_id;
/* virtio queue */
u16 queue_selector;
@@ -137,6 +139,8 @@ static bool virtio_rng_pci_io_out(struct ioport *ioport,
struct kvm *kvm, u16 po
struct rng_dev_job *job;
void *p;
+ compat__remove_message(rdev->compat_id);
+
queue = &rdev->vqs[rdev->queue_selector];
queue->pfn = ioport__read32(data);
p = guest_pfn_to_host(kvm, queue->pfn);
@@ -279,6 +283,12 @@ void virtio_rng__init(struct kvm *kvm)
ioeventfd__add_event(&ioevent);
}
+
+ rdev->compat_id = compat__add_message("virtio-rng device was not
detected",
+ "While you have requested a
virtio-rng device, "
+ "the guest kernel didn't seem
to detect it.\n"
+ "Please make sure that the
kernel was compiled"
+ "with
CONFIG_HW_RANDOM_VIRTIO.");
}
void virtio_rng__delete_all(struct kvm *kvm)
--
1.7.6
--
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