virtio — archive

[Rusty Russell]

Signed-off-by: Rusty Russell <rusty@au1.ibm.com> --- content.tex 22 +++++++++++ ----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/content.tex b/content.tex index 6b7dfdc..0e264f5 100644 --- a/content.tex +++ b/content.tex @@ -2655,7 +2655,7 @@ Device ID & Virtio Device \ hline 4 & entropy source \ hline -5 & memory ballooning \ +5 & memory ballooning (legacy) \ hline 6 & ioMemory \ hline @@ -2671,6 +2671,8 @@ Device ID & Virtio Device \ hline 12 & virtio CAIF \ hline +13 & memory balloon \ +hline 16 & GPU device \ hline end{tabular} @@ -3909,7 +3911,12 @@ how many random bytes were received. The device MUST place one or more random bytes into the buffer, but it MAY use less than the entire buffer length. -section{Memory Balloon Device}label{sec:Device Types / Memory Balloon Device} +section{Legacy Interface: Memory Balloon Device}label{sec:Device Types / Memory Balloon Device} + +This device is deprecated, and thus only exists as a legacy device +illustrated here for reference. The device number 13 is reserved for +a new memory balloon interface which is expected in a future version +of the standard. The virtio memory balloon device is a primitive device for managing guest memory: the device asks for a certain amount of @@ -3951,7 +3958,6 @@ struct virtio_balloon_config { }; end{lstlisting} -subsubsection{Legacy Interface: Device configuration layout}label{sec:Device Types / Memory Balloon Device / Device configuration layout / Legacy Interface: Device configuration layout} Note that these fields are always little endian, despite convention that legacy device fields are guest endian. @@ -4044,7 +4050,6 @@ as follows: compatibility, unsupported statistics should be omitted. egin{lstlisting} -/* Note: LEGACY version was not little endian! */ struct virtio_balloon_stat { #define VIRTIO_BALLOON_S_SWAP_IN 0 #define VIRTIO_BALLOON_S_SWAP_OUT 1 @@ -4052,16 +4057,11 @@ struct virtio_balloon_stat { #define VIRTIO_BALLOON_S_MINFLT 3 #define VIRTIO_BALLOON_S_MEMFREE 4 #define VIRTIO_BALLOON_S_MEMTOT 5 - le16 tag; - le64 val; + u16 tag; + u64 val; } __attribute__((packed)); end{lstlisting} -paragraph{Legacy Interface: Memory Statistics}label{sec:Device Types / Memory Balloon Device / Device Operation / Memory Statistics / Legacy Interface: Memory Statistics} -For legacy devices, the fields in struct virtio_balloon_stat are the -native endian of the guest rather than (necessarily) little-endian. - - subsubsection{Memory Statistics Tags}label{sec:Device Types / Memory Balloon Device / Device Operation / Memory Statistics Tags} egin{description} -- 1.8.3.2