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This is a simple non-material change.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@542 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@541 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@540 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Approved Aug 2:
https://www.oasis-open.org/apps/org/workgroup/virtio/ballot.php?id=2843
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@537 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@536 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Actually strike out deleted text.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@535 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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work around more latexdiff issues:
- force FL style within headers
- fix beginFL ending with end and vice versa
across begin/end of enum or itemize
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@534 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Helps detect begin/end crossing these environments
and fix up automatically.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@533 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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\\note just before start of subsection seems to
confuse latex, resulting in incorrect text alignment.
Replace with \begin{note} \end{note}.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@532 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Document resolutions to VIRTIO-123, VIRTIO-124, VIRTIO-126 and
VIRTIO-143.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@531 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Link new conformance statements added by commit
network device: document VIRTIO_NET_F_CTRL_RX_EXTRA
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@530 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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VIRTIO-124
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@529 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Fix up multiple issues in xmit/receive sections:
- drop MAY/MUST/SHOULD outside normative statements
- spell out conformance requirements for both drivers and
devices, for xmit and receive paths
- document the missing VIRTIO_NET_HDR_F_DATA_VALID
- document handling of unrecognized flag bits so we can extend
flags in the future, similar to VIRTIO_NET_HDR_F_DATA_VALID
VIRTIO-123
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@528 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Document the new option, and also clarify behaviour
without it.
In particular, I noticed that actual field is not the
actual number of pages in the balloon as
driver might do inflate followed by deflate.
Also, device isn't always driven by interrupts,
driver can inflate/deflate in response to e.g.
memory compaction.
VIRTIO-126
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@527 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Virtio 1.0 cs02 doesn't include a modern balloon device. At some
point we'll likely define an incompatible interface with a
different ID and different semantics. But for now, it's not a
big effort to support a transitional balloon device: this has the
advantage of supporting existing drivers, transparently, as well
as transports that don't allow mixing virtio 0 and virtio 1
devices. And balloon is an easy device to test, so it's also
useful for people to test virtio core handling of transitional
devices.
Three issues with legacy hypervisors have been identified:
1. Actual value is actually used, and is necessary for management
to work. Luckily 4 byte config space writes are now atomic.
When using old guests, hypervisors can detect access to the last byte.
When using old hypervisors, drivers can use atomic 4-byte accesses.
2. Hypervisors actually didn't ignore the stats from the first
buffer supplied. This means the values there would be
incorrect until hypervisor resends the request.
Add a note suggesting hypervisors ignore the 1st buffer.
3. QEMU simply over-writes stats from each buffer it gets.
Thus if driver supplies a different subset of stats
on each request, stale values will be there.
Require drivers to supply the same subset on each
request. This also gives us a simple way to figure out
which stats are supported.
VIRTIO-143
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@526 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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document changes made by commits r520 to r523 inclusive
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@525 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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previous commit "used ring: specify legacy behaviour for len field"
to resolve VIRTIO-141 added new sections with normative
statements for legacy balloon and scsi devices. Link them from
the conformance section.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@524 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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The driver MUST examine the length written by the driver
makes no sense. length is written by the device.
VIRTIO-142
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@523 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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many hypervisors implemented len field incorrectly.
Document existing bugs in the legacy sections.
VIRTIO-141
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@522 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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1) It's implied that a chain terminates with an indirect descriptor (since
VIRTIO-15) but we didn't spell out that a device MUST NOT continue it.
2) We allow [direct]->[direct]->[indirect], and qemu and bhyve both accept
it. Make it clear that this is valid, thus devices MUST handle it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@521 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Just saying 64 bit fields may not be atomic is true, but less helpful
than it might be. Add explicit guidance about what the consequences of
non-atomicity are.
VIRTIO-140
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@520 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Should be Michael S. Tsirkin, not Michael Tsirkin.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@519 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@518 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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acknowledge feedback by Jason Wang, add Richard Sohn who joined
the TC, sort acknowledged reviewers alphabetically.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@517 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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wording tweak in balloon.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@516 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@515 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@514 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@513 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Changelog appears within DIFaddbegin/DIFaddend,
suppress marking it as added text, that's confusing.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@512 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@511 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Add links to new conformance statements added to
resolve VIRTIO-137 (describing used ring entry len usage).
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@510 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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MUST shouldn't be used outside normative statements,
that's confusing. Replace with "has to".
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@509 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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pci spec says what width access to use for 32, 16 and 8
bit fields, but does not explicitly say what to do for
32 bit fields. As we have text that says driver must
treat 64 bit accesses as non-atomic, this seems
to imply driver should always do two 32 bit wide accesses.
Let's make this an explicit requirement, and require
devices to support this.
VIRTIO-139
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@508 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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latexdiff doesn't handle changing labels well,
causes latex unresolved reference errors.
opencode and mark up diff manually.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@507 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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virtio 1.0 has two sections titled "Non-transitional Device With
Legacy Driver" the first says devices SHOULD fail, the second
says devices MUST fail. Clearly a mistake.
Other issues: devices don't really fail - they cause drivers to
fail. second section seems to be in the wrong place, and also
have a section followed by subsection with no explanatory text in
between, which is ugly.
Finally, this text was originally ritten to handle buggy windows
drivers gracefully, but later we changed device IDs so it's not
really required there. Might be handy for some other buggy legacy
drivers, though no such drivers are known.
To fix, drop the duplicate section variant, add some explanatory
text, clarify what does "same ID" mean here, and clarify
that the work-around is only needed if a buggy driver
is known to bind to a transitional device.
VIRTIO-138
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@506 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@505 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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We said what it was for, and noted why. We didn't place any requirements
on it, nor clearly spell out the implications of its use.
This clarification comes particularly from noticing that QEMU didn't
set len correctly, and philosophising over the correct value when
an error has occurred.
(Wording precision feedback from Michael and Cornelia - Thanks!)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@504 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@503 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@502 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@501 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@500 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@499 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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makes changelog diff slightly prettier.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@498 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@497 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@496 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Doesn't work properly with latexdiff anyway.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@495 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@494 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@493 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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This reverts commit de1e7c191a168195f67aa5259603f83264b35e28.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@492 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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This reverts commit d9536a52200d9f9f5048fd6534605ec75aadb08f.
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@491 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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