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| author | rusty <rusty@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2013-08-16 03:20:05 +0000 |
|---|---|---|
| committer | rusty <rusty@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2013-08-16 03:20:05 +0000 |
| commit | 69fbbac976180a38519d2319c7927ec09b746119 (patch) | |
| tree | 0c95ded98c6500f27e225d9ddc868749ee738025 | |
| parent | 4a831c11b67ca68e2009408b1c90b7b504213040 (diff) | |
2.6 Reserved Feature Bits: document bit 30 as used by qemu.
Partial port of draft commit 835628846cc04efe660e505552d06eb945277d3b.
Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@13 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
| -rw-r--r-- | virtio-spec.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/virtio-spec.txt b/virtio-spec.txt index f7c80ec..d762461 100644 --- a/virtio-spec.txt +++ b/virtio-spec.txt @@ -2502,6 +2502,10 @@ Currently there are four device-independent feature bits defined: ignore the avail_event field; the flags field is used +In addition, bit 30 is used by qemu's implementation to check for experimental +early versions of virtio which did not perform correct feature negotiation, +and should not be used. + 2.7 virtio_ring.h ================= |