Signed-off-by: Sasha Levin <levinsasha...@gmail.com>
---
tools/kvm/include/kvm/virtio-9p.h | 1 +
tools/kvm/virtio/9p.c | 9 +++++++++
2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/include/kvm/virtio-9p.h
b/tools/kvm/include/kvm/virtio-9p.h
index 0e55e5c..70db831 100644
--- a/tools/kvm/include/kvm/virtio-9p.h
+++ b/tools/kvm/include/kvm/virtio-9p.h
@@ -44,6 +44,7 @@ struct p9_dev {
u32 features;
struct virtio_9p_config *config;
u16 base_addr;
+ int compat_id;
/* virtio queue */
u16 queue_selector;
diff --git a/tools/kvm/virtio/9p.c b/tools/kvm/virtio/9p.c
index ca9268a..92fe345 100644
--- a/tools/kvm/virtio/9p.c
+++ b/tools/kvm/virtio/9p.c
@@ -5,6 +5,7 @@
#include "kvm/ioeventfd.h"
#include "kvm/irq.h"
#include "kvm/virtio-9p.h"
+#include "kvm/guest_compat.h"
#include <stdio.h>
#include <stdlib.h>
@@ -781,6 +782,8 @@ static bool virtio_p9_pci_io_out(struct ioport *ioport,
struct kvm *kvm,
struct p9_dev_job *job;
struct virt_queue *queue;
+ compat__remove_message(p9dev->compat_id);
+
job = &p9dev->jobs[p9dev->queue_selector];
queue = &p9dev->vqs[p9dev->queue_selector];
queue->pfn = ioport__read32(data);
@@ -900,6 +903,12 @@ int virtio_9p__init(struct kvm *kvm, const char *root,
const char *tag_name)
};
pci__register(&p9dev->pci_hdr, dev);
+ p9dev->compat_id = compat__add_message("virtio-9p device was not
detected",
+ "While you have requested a
virtio-9p device, "
+ "the guest kernel didn't seem
to detect it.\n"
+ "Please make sure that the
kernel was compiled"
+ "with CONFIG_NET_9P_VIRTIO.");
+
return err;
free_p9dev_config:
--
1.7.6
--
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