1b4aa2faec
Make the balloon interface always use 4K pages, and convert Linux pfns if necessary. This patch assumes that Linux's PAGE_SHIFT will never be less than 12. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (modified)
24 lines
688 B
C
24 lines
688 B
C
#ifndef _LINUX_VIRTIO_BALLOON_H
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#define _LINUX_VIRTIO_BALLOON_H
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/* This header is BSD licensed so anyone can use the definitions to implement
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* compatible drivers/servers. */
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#include <linux/virtio_config.h>
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/* The ID for virtio_balloon */
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#define VIRTIO_ID_BALLOON 5
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/* The feature bitmap for virtio balloon */
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#define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */
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/* Size of a PFN in the balloon interface. */
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#define VIRTIO_BALLOON_PFN_SHIFT 12
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struct virtio_balloon_config
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{
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/* Number of pages host wants Guest to give up. */
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__le32 num_pages;
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/* Number of pages we've actually got in balloon. */
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__le32 actual;
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};
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#endif /* _LINUX_VIRTIO_BALLOON_H */
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