Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
---
tools/kvm/virtio/balloon.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/virtio/balloon.c b/tools/kvm/virtio/balloon.c
index c5853a5..05bb196 100644
--- a/tools/kvm/virtio/balloon.c
+++ b/tools/kvm/virtio/balloon.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_balloon.h>
@@ -48,6 +49,7 @@ struct bln_dev {
u16 stat_count;
int stat_waitfd;
+ int compat_id;
struct virtio_balloon_config config;
};
@@ -211,6 +213,8 @@ static bool virtio_bln_pci_io_out(struct ioport *ioport, struct kvm *kvm, u16 po
struct virt_queue *queue;
void *p;
+ compat__remove_message(bdev.compat_id);
+
queue = &bdev.vqs[bdev.queue_selector];
queue->pfn = ioport__read32(data);
p = guest_pfn_to_host(kvm, queue->pfn);
@@ -366,4 +370,10 @@ void virtio_bln__init(struct kvm *kvm)
memset(&bdev.config, 0, sizeof(struct virtio_balloon_config));
pci__register(&bdev.pci_hdr, dev);
+
+ bdev.compat_id = compat__add_message("virtio-balloon device was not detected",
+ "While you have requested a virtio-balloon device, "
+ "the guest kernel didn't seem to detect it.\n"
+ "Please make sure that the kernel was compiled"
+ "with CONFIG_VIRTIO_BALLOON.");
}
--
1.7.6
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