linux-kernel - [PATCH v6 QEMU 2/3] virtio-balloon: Add bit to notify guest of unused page reporting

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Message-ID: <20190821150037.21485.3191.stgit@localhost.localdomain>
Date:   Wed, 21 Aug 2019 08:00:37 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     nitesh@...hat.com, kvm@...r.kernel.org, mst@...hat.com,
        david@...hat.com, dave.hansen@...el.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        akpm@...ux-foundation.org, virtio-dev@...ts.oasis-open.org
Cc:     yang.zhang.wz@...il.com, pagupta@...hat.com, riel@...riel.com,
        konrad.wilk@...cle.com, willy@...radead.org,
        lcapitulino@...hat.com, wei.w.wang@...el.com, aarcange@...hat.com,
        pbonzini@...hat.com, dan.j.williams@...el.com, mhocko@...nel.org,
        alexander.h.duyck@...ux.intel.com, osalvador@...e.de
Subject: [PATCH v6 QEMU 2/3] virtio-balloon: Add bit to notify guest of
 unused page reporting

From: Alexander Duyck <alexander.h.duyck@...ux.intel.com>

Add a bit for the page reporting feature provided by virtio-balloon.

This patch should be replaced once the feature is added to the Linux kernel
and the bit is backported into this exported kernel header.

Signed-off-by: Alexander Duyck <alexander.h.duyck@...ux.intel.com>
---
 include/standard-headers/linux/virtio_balloon.h |    1 +
 1 file changed, 1 insertion(+)

diff --git a/include/standard-headers/linux/virtio_balloon.h b/include/standard-headers/linux/virtio_balloon.h
index 9375ca2a70de..1c5f6d6f2de6 100644
--- a/include/standard-headers/linux/virtio_balloon.h
+++ b/include/standard-headers/linux/virtio_balloon.h
@@ -36,6 +36,7 @@
 #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM	2 /* Deflate balloon on OOM */
 #define VIRTIO_BALLOON_F_FREE_PAGE_HINT	3 /* VQ to report free pages */
 #define VIRTIO_BALLOON_F_PAGE_POISON	4 /* Guest is using page poisoning */
+#define VIRTIO_BALLOON_F_REPORTING	5 /* Page reporting virtqueue */
 
 /* Size of a PFN in the balloon interface. */
 #define VIRTIO_BALLOON_PFN_SHIFT 12