41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
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From: Cornelia Huck <cohuck@redhat.com>
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Date: Wed, 5 Dec 2018 15:35:03 +0100
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Subject: vfio-ap: flag as compatible with balloon
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vfio-ap devices do not pin any pages in the host. Therefore, they
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are compatible with memory ballooning.
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Flag them as compatible, so both vfio-ap and a balloon can be
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used simultaneously.
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Cc: qemu-stable@nongnu.org
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Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Tested-by: Tony Krowiak <akrowiak@linux.ibm.com>
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Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 1883e8fc8005e9ef452890a075bae98e8c432968)
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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hw/vfio/ap.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
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index 65de952f44..0a25f5e096 100644
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--- a/hw/vfio/ap.c
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+++ b/hw/vfio/ap.c
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@@ -104,6 +104,14 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp)
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vapdev->vdev.name = g_strdup_printf("%s", mdevid);
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vapdev->vdev.dev = dev;
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+ /*
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+ * vfio-ap devices operate in a way compatible with
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+ * memory ballooning, as no pages are pinned in the host.
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+ * This needs to be set before vfio_get_device() for vfio common to
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+ * handle the balloon inhibitor.
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+ */
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+ vapdev->vdev.balloon_allowed = true;
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+
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ret = vfio_get_device(vfio_group, mdevid, &vapdev->vdev, &local_err);
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if (ret) {
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goto out_get_dev_err;
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