From: Tiwei Bie <tiwei.bie@intel.com>
To: mst@redhat.com, cohuck@redhat.com, stefanha@redhat.com,
pbonzini@redhat.com, virtio-dev@lists.oasis-open.org
Cc: dan.daly@intel.com, cunming.liang@intel.com, zhihong.wang@intel.com
Subject: [virtio-dev] [RFC] content: use a consistent wording for device status
Date: Tue, 12 Jun 2018 13:32:21 +0800 [thread overview]
Message-ID: <20180612053221.22925-1-tiwei.bie@intel.com> (raw)
There is a part called "device status field" in a
Virtio device. Currently, both of \field{status}
and \field{device status} are used to refer to it,
which is a bit confusing. This patch changes spec
to use \field{device status} consistently.
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
---
If we want this change, I'll open an issue and
send a formal patch.
content.tex | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/content.tex b/content.tex
index be18234..b8f7b0a 100644
--- a/content.tex
+++ b/content.tex
@@ -2099,7 +2099,7 @@ value.
As described in
\ref{devicenormative:Basic Facilities of a Virtio Device / Feature Bits},
-a device sometimes fails to set the \field{status} field: For example, it
+a device sometimes fails to set the \field{device status} field: For example, it
might fail to accept the FEATURES_OK status bit during device initialization.
With revision 2, CCW_CMD_READ_STATUS is defined: It reads an 8 bit status
@@ -2109,10 +2109,11 @@ value from the device and acts as a reverse operation to CCW_CMD_WRITE_STATUS.
If the device posts a unit check with command reject in response to the
CCW_CMD_WRITE_STATUS command, the driver MUST assume that the device failed
-to set the status and the \field{status} field retained its previous value.
+to set the status and the \field{device status} field retained
+its previous value.
If at least revision 2 has been negotiated, the driver SHOULD use the
-CCW_CMD_READ_STATUS command to retrieve the \field{status} field after
+CCW_CMD_READ_STATUS command to retrieve the \field{device status} field after
a configuration change has been detected.
If not at least revision 2 has been negotiated, the driver MUST NOT attempt
@@ -2120,12 +2121,14 @@ to issue the CCW_CMD_READ_STATUS command.
\devicenormative{\paragraph}{Communicating Status Information}{Virtio Transport Options / Virtio over channel I/O / Device Initialization / Communicating Status Information}
-If the device fails to set the \field{status} field to the value written by
-the driver, the device MUST assure that the \field{status} field is left
-unchanged and MUST post a unit check with command reject.
+If the device fails to set the \field{device status} field
+to the value written by the driver, the device MUST assure
+that the \field{device status} field is left unchanged and
+MUST post a unit check with command reject.
If at least revision 2 has been negotiated, the device MUST return the
-current \field{status} field if the CCW_CMD_READ_STATUS command is issued.
+current \field{device status} field if the CCW_CMD_READ_STATUS
+command is issued.
\subsubsection{Handling Device Features}\label{sec:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Handling Device Features}
@@ -3665,7 +3668,7 @@ If VIRTIO_BLK_F_CONFIG_WCE was not negotiated but VIRTIO_BLK_F_FLUSH was,
the driver SHOULD assume presence of a writeback cache.
The driver MUST NOT read \field{writeback} before setting
-the FEATURES_OK \field{status} bit.
+the FEATURES_OK \field{device status} bit.
\devicenormative{\subsubsection}{Device Initialization}{Device Types / Block Device / Device Initialization}
@@ -3687,7 +3690,7 @@ legacy interface:
\begin{itemize}
\item the driver MAY read or write \field{writeback} before setting
- the DRIVER or DRIVER_OK \field{status} bit
+ the DRIVER or DRIVER_OK \field{device status} bit
\item the device MUST NOT modify the cache mode (and \field{writeback})
as a result of a driver setting a status bit, unless
--
2.17.0
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next reply other threads:[~2018-06-12 5:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-12 5:32 Tiwei Bie [this message]
2018-06-13 9:05 ` [virtio-dev] Re: [RFC] content: use a consistent wording for device status Cornelia Huck
2018-06-13 9:13 ` Tiwei Bie
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