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<title>linux-toradex.git/include/linux/virtio_config.h, branch T20_LinuxImageV2.0Beta1_20121218</title>
<subtitle>Linux kernel for Apalis and Colibri modules</subtitle>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/'/>
<entry>
<title>virtio: add full three-clause BSD text to headers.</title>
<updated>2011-05-30T01:44:14+00:00</updated>
<author>
<name>Rusty Russell</name>
<email>rusty@rustcorp.com.au</email>
</author>
<published>2011-05-30T17:14:13+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=a1b383870a28cfbd1657d4922c0fafc634a62ebd'/>
<id>a1b383870a28cfbd1657d4922c0fafc634a62ebd</id>
<content type='text'>
It's unclear to me if it's important, but it's obviously causing my
technical colleages some headaches and I'd hate such imprecision to
slow virtio adoption.

I've emailed this to all non-trivial contributors for approval, too.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Acked-by: Grant Likely &lt;grant.likely@secretlab.ca&gt;
Acked-by: Ryan Harper &lt;ryanh@us.ibm.com&gt;
Acked-by: Anthony Liguori &lt;aliguori@us.ibm.com&gt;
Acked-by: Eric Van Hensbergen &lt;ericvh@gmail.com&gt;
Acked-by: john cooper &lt;john.cooper@redhat.com&gt;
Acked-by: Aneesh Kumar K.V &lt;aneesh.kumar@linux.vnet.ibm.com&gt;
Acked-by: Christian Borntraeger &lt;borntraeger@de.ibm.com&gt;
Acked-by: Fernando Luis Vazquez Cao &lt;fernando@oss.ntt.co.jp&gt;
</content>
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<pre>
It's unclear to me if it's important, but it's obviously causing my
technical colleages some headaches and I'd hate such imprecision to
slow virtio adoption.

I've emailed this to all non-trivial contributors for approval, too.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Acked-by: Grant Likely &lt;grant.likely@secretlab.ca&gt;
Acked-by: Ryan Harper &lt;ryanh@us.ibm.com&gt;
Acked-by: Anthony Liguori &lt;aliguori@us.ibm.com&gt;
Acked-by: Eric Van Hensbergen &lt;ericvh@gmail.com&gt;
Acked-by: john cooper &lt;john.cooper@redhat.com&gt;
Acked-by: Aneesh Kumar K.V &lt;aneesh.kumar@linux.vnet.ibm.com&gt;
Acked-by: Christian Borntraeger &lt;borntraeger@de.ibm.com&gt;
Acked-by: Fernando Luis Vazquez Cao &lt;fernando@oss.ntt.co.jp&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Remove MAYBE_BUILD_BUG_ON</title>
<updated>2011-01-24T04:15:11+00:00</updated>
<author>
<name>Rusty Russell</name>
<email>rusty@rustcorp.com.au</email>
</author>
<published>2011-01-24T20:45:10+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=1765e3a4933ea0870fabd755feffc5473c4363ce'/>
<id>1765e3a4933ea0870fabd755feffc5473c4363ce</id>
<content type='text'>
Now BUILD_BUG_ON() can handle optimizable constants, we don't need
MAYBE_BUILD_BUG_ON any more.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Now BUILD_BUG_ON() can handle optimizable constants, we don't need
MAYBE_BUILD_BUG_ON any more.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>BUILD_BUG_ON(): fix it and a couple of bogus uses of it</title>
<updated>2009-09-23T14:39:29+00:00</updated>
<author>
<name>Jan Beulich</name>
<email>JBeulich@novell.com</email>
</author>
<published>2009-09-22T23:43:52+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=8c87df457cb58fe75b9b893007917cf8095660a0'/>
<id>8c87df457cb58fe75b9b893007917cf8095660a0</id>
<content type='text'>
gcc permitting variable length arrays makes the current construct used for
BUILD_BUG_ON() useless, as that doesn't produce any diagnostic if the
controlling expression isn't really constant.  Instead, this patch makes
it so that a bit field gets used here.  Consequently, those uses where the
condition isn't really constant now also need fixing.

Note that in the gfp.h, kmemcheck.h, and virtio_config.h cases
MAYBE_BUILD_BUG_ON() really just serves documentation purposes - even if
the expression is compile time constant (__builtin_constant_p() yields
true), the array is still deemed of variable length by gcc, and hence the
whole expression doesn't have the intended effect.

[akpm@linux-foundation.org: make arch/sparc/include/asm/vio.h compile]
[akpm@linux-foundation.org: more nonsensical assertions in tpm.c..]
Signed-off-by: Jan Beulich &lt;jbeulich@novell.com&gt;
Cc: Andi Kleen &lt;andi@firstfloor.org&gt;
Cc: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Cc: "David S. Miller" &lt;davem@davemloft.net&gt;
Cc: Rajiv Andrade &lt;srajiv@linux.vnet.ibm.com&gt;
Cc: Mimi Zohar &lt;zohar@us.ibm.com&gt;
Cc: James Morris &lt;jmorris@namei.org&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
gcc permitting variable length arrays makes the current construct used for
BUILD_BUG_ON() useless, as that doesn't produce any diagnostic if the
controlling expression isn't really constant.  Instead, this patch makes
it so that a bit field gets used here.  Consequently, those uses where the
condition isn't really constant now also need fixing.

Note that in the gfp.h, kmemcheck.h, and virtio_config.h cases
MAYBE_BUILD_BUG_ON() really just serves documentation purposes - even if
the expression is compile time constant (__builtin_constant_p() yields
true), the array is still deemed of variable length by gcc, and hence the
whole expression doesn't have the intended effect.

[akpm@linux-foundation.org: make arch/sparc/include/asm/vio.h compile]
[akpm@linux-foundation.org: more nonsensical assertions in tpm.c..]
Signed-off-by: Jan Beulich &lt;jbeulich@novell.com&gt;
Cc: Andi Kleen &lt;andi@firstfloor.org&gt;
Cc: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Cc: "David S. Miller" &lt;davem@davemloft.net&gt;
Cc: Rajiv Andrade &lt;srajiv@linux.vnet.ibm.com&gt;
Cc: Mimi Zohar &lt;zohar@us.ibm.com&gt;
Cc: James Morris &lt;jmorris@namei.org&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>lguest and virtio: cleanup struct definitions to Linux style.</title>
<updated>2009-07-30T06:33:46+00:00</updated>
<author>
<name>Rusty Russell</name>
<email>rusty@rustcorp.com.au</email>
</author>
<published>2009-07-30T22:03:46+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=1842f23c05b6a866be831aa60bc8a8731c58ddd0'/>
<id>1842f23c05b6a866be831aa60bc8a8731c58ddd0</id>
<content type='text'>
I've been doing this for years, and akpm picked me up on it about 12
months ago.  lguest partly serves as example code, so let's do it Right.

Also, remove two unused fields in struct vblk_info in the example launcher.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Cc: Ingo Molnar &lt;mingo@redhat.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
I've been doing this for years, and akpm picked me up on it about 12
months ago.  lguest partly serves as example code, so let's do it Right.

Also, remove two unused fields in struct vblk_info in the example launcher.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Cc: Ingo Molnar &lt;mingo@redhat.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>virtio: teach virtio_has_feature() about transport features</title>
<updated>2009-06-12T12:46:38+00:00</updated>
<author>
<name>Mark McLoughlin</name>
<email>markmc@redhat.com</email>
</author>
<published>2009-05-11T17:11:44+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=ee006b353f1ca8c9a8470b72b462beb011d62e32'/>
<id>ee006b353f1ca8c9a8470b72b462beb011d62e32</id>
<content type='text'>
Drivers don't add transport features to their table, so we
shouldn't check these with virtio_check_driver_offered_feature().

We could perhaps add an -&gt;offered_feature() virtio_config_op,
but that perhaps that would be overkill for a consitency check
like this.

Signed-off-by: Mark McLoughlin &lt;markmc@redhat.com&gt;
Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Drivers don't add transport features to their table, so we
shouldn't check these with virtio_check_driver_offered_feature().

We could perhaps add an -&gt;offered_feature() virtio_config_op,
but that perhaps that would be overkill for a consitency check
like this.

Signed-off-by: Mark McLoughlin &lt;markmc@redhat.com&gt;
Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>virtio: find_vqs/del_vqs virtio operations</title>
<updated>2009-06-12T12:46:36+00:00</updated>
<author>
<name>Michael S. Tsirkin</name>
<email>mst@redhat.com</email>
</author>
<published>2009-06-13T04:16:36+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=d2a7ddda9ffb1c8961abff6714b0f1eb925c120f'/>
<id>d2a7ddda9ffb1c8961abff6714b0f1eb925c120f</id>
<content type='text'>
This replaces find_vq/del_vq with find_vqs/del_vqs virtio operations,
and updates all drivers. This is needed for MSI support, because MSI
needs to know the total number of vectors upfront.

Signed-off-by: Michael S. Tsirkin &lt;mst@redhat.com&gt;
Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt; (+ lguest/9p compile fixes)
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
This replaces find_vq/del_vq with find_vqs/del_vqs virtio operations,
and updates all drivers. This is needed for MSI support, because MSI
needs to know the total number of vectors upfront.

Signed-off-by: Michael S. Tsirkin &lt;mst@redhat.com&gt;
Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt; (+ lguest/9p compile fixes)
</pre>
</div>
</content>
</entry>
<entry>
<title>virtio: add names to virtqueue struct, mapping from devices to queues.</title>
<updated>2009-06-12T12:46:36+00:00</updated>
<author>
<name>Rusty Russell</name>
<email>rusty@rustcorp.com.au</email>
</author>
<published>2009-06-13T04:16:35+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=9499f5e7ed5224c40706f0cec6542a9916bc7606'/>
<id>9499f5e7ed5224c40706f0cec6542a9916bc7606</id>
<content type='text'>
Add a linked list of all virtqueues for a virtio device: this helps for
debugging and is also needed for upcoming interface change.

Also, add a "name" field for clearer debug messages.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Add a linked list of all virtqueues for a virtio device: this helps for
debugging and is also needed for upcoming interface change.

Also, add a "name" field for clearer debug messages.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>virtio: Rename set_features to finalize_features</title>
<updated>2008-07-25T02:06:12+00:00</updated>
<author>
<name>Rusty Russell</name>
<email>rusty@rustcorp.com.au</email>
</author>
<published>2008-07-25T17:06:07+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=c624896e488ba2bff5ae497782cfb265c8b00646'/>
<id>c624896e488ba2bff5ae497782cfb265c8b00646</id>
<content type='text'>
Rather than explicitly handing the features to the lower-level, we just
hand the virtio_device and have it set the features.  This make it clear
that it has the chance to manipulate the features of the device at this
point (and that all feature negotiation is already done).

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Rather than explicitly handing the features to the lower-level, we just
hand the virtio_device and have it set the features.  This make it clear
that it has the chance to manipulate the features of the device at this
point (and that all feature negotiation is already done).

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>virtio: Formally reserve bits 28-31 to be 'transport' features.</title>
<updated>2008-07-25T02:06:07+00:00</updated>
<author>
<name>Rusty Russell</name>
<email>rusty@rustcorp.com.au</email>
</author>
<published>2008-07-25T17:06:07+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=dd7c7bc46211785a1aa7d70feb15830f62682b3c'/>
<id>dd7c7bc46211785a1aa7d70feb15830f62682b3c</id>
<content type='text'>
We assign feature bits as required, but it makes sense to reserve some
for the particular transport, rather than the particular device.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
We assign feature bits as required, but it makes sense to reserve some
for the particular transport, rather than the particular device.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>virtio: clarify that ABI is usable by any implementations</title>
<updated>2008-07-25T02:06:04+00:00</updated>
<author>
<name>Rusty Russell</name>
<email>rusty@rustcorp.com.au</email>
</author>
<published>2008-07-25T17:06:03+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=674bfc23c585b34c42263d73fb51710d49762a23'/>
<id>674bfc23c585b34c42263d73fb51710d49762a23</id>
<content type='text'>
We want others to implement and use virtio, so it makes sense to BSD
license the non-__KERNEL__ parts of the headers to make this crystal
clear.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Acked-by: Christian Borntraeger &lt;borntraeger@de.ibm.com&gt;
Acked-by: Mark McLoughlin &lt;markmc@redhat.com&gt;
Acked-by: Ryan Harper &lt;ryanh@us.ibm.com&gt;
Acked-by: Eric Van Hensbergen &lt;ericvh@gmail.com&gt;
Acked-by: Anthony Liguori &lt;aliguori@us.ibm.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
We want others to implement and use virtio, so it makes sense to BSD
license the non-__KERNEL__ parts of the headers to make this crystal
clear.

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
Acked-by: Christian Borntraeger &lt;borntraeger@de.ibm.com&gt;
Acked-by: Mark McLoughlin &lt;markmc@redhat.com&gt;
Acked-by: Ryan Harper &lt;ryanh@us.ibm.com&gt;
Acked-by: Eric Van Hensbergen &lt;ericvh@gmail.com&gt;
Acked-by: Anthony Liguori &lt;aliguori@us.ibm.com&gt;
</pre>
</div>
</content>
</entry>
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