/*
 * net/sched/act_meta_prio.c IFE skb->priority metadata module
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * copyright Jamal Hadi Salim (2015)
 *
*/

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/module.h>
#include <linux/init.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <uapi/linux/tc_act/tc_ife.h>
#include <net/tc_act/tc_ife.h>

static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e)
{
	return ife_check_meta_u32(skb->priority, e);
}

static int skbprio_encode(struct sk_buff *skb, void *skbdata,
			  struct tcf_meta_info *e)
{
	u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/

	return ife_encode_meta_u32(ifeprio, skbdata, e);
}

static int skbprio_decode(struct sk_buff *skb, void *data, u16 len)
{
	u32 ifeprio = *(u32 *)data;

	skb->priority = ntohl(ifeprio);
	return 0;
}

static struct tcf_meta_ops ife_prio_ops = {
	.metaid = IFE_META_PRIO,
	.metatype = NLA_U32,
	.name = "skbprio",
	.synopsis = "skb prio metadata",
	.check_presence = skbprio_check,
	.encode = skbprio_encode,
	.decode = skbprio_decode,
	.get = ife_get_meta_u32,
	.alloc = ife_alloc_meta_u32,
	.owner = THIS_MODULE,
};

static int __init ifeprio_init_module(void)
{
	return register_ife_op(&ife_prio_ops);
}

static void __exit ifeprio_cleanup_module(void)
{
	unregister_ife_op(&ife_prio_ops);
}

module_init(ifeprio_init_module);
module_exit(ifeprio_cleanup_module);

MODULE_AUTHOR("Jamal Hadi Salim(2015)");
MODULE_DESCRIPTION("Inter-FE skb prio metadata action");
MODULE_LICENSE("GPL");
MODULE_ALIAS_IFE_META(IFE_META_PRIO);
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=97e219b7c1f75b14b29abe28ad53e8709e8d15e5'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?id=97e219b7c1f75b14b29abe28ad53e8709e8d15e5'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/6lowpan?id=97e219b7c1f75b14b29abe28ad53e8709e8d15e5'>6lowpan</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/6lowpan/iphc.c?id=97e219b7c1f75b14b29abe28ad53e8709e8d15e5'>iphc.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/6lowpan/iphc.c?id=97e219b7c1f75b14b29abe28ad53e8709e8d15e5&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
/tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Borislav Petkov &lt;bp@suse.de&gt;</td><td class='right'>2017-01-20 21:29:40 +0100</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-23 09:39:55 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/platform_pci.h?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>c26665ab5c49ad3e142e0f054ca3204f259ba09c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/xen/platform_pci.h?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>3bab11918e18e9d25ef7544dba05cdf39d1abec5</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/xen/platform_pci.h?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>include/xen/platform_pci.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/platform_pci.h?id=7a308bb3016f57e5be11a677d15b821536419d36'>7a308bb3016f57e5be11a677d15b821536419d36</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen/platform_pci.h?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c&amp;id2=7a308bb3016f57e5be11a677d15b821536419d36'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/microcode/intel: Drop stashed AP patch pointer optimization</div><div class='commit-msg'>This was meant to save us the scanning of the microcode containter in
the initrd since the first AP had already done that but it can also hurt
us:

Imagine a single hyperthreaded CPU (Intel(R) Atom(TM) CPU N270, for
example) which updates the microcode on the BSP but since the microcode
engine is shared between the two threads, the update on CPU1 doesn't
happen because it has already happened on CPU0 and we don't find a newer
microcode revision on CPU1.

Which doesn't set the intel_ucode_patch pointer and at initrd
jettisoning time we don't save the microcode patch for later
application.

Now, when we suspend to RAM, the loaded microcode gets cleared so we
need to reload but there's no patch saved in the cache.

Removing the optimization fixes this issue and all is fine and dandy.

Fixes: 06b8534cb728 ("x86/microcode: Rework microcode loading")
Signed-off-by: Borislav Petkov &lt;bp@suse.de&gt;
Reviewed-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Link: http://lkml.kernel.org/r/20170120202955.4091-2-bp@alien8.de
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>Diffstat</a> (limited to 'include/xen/platform_pci.h')</div><table summary='diffstat' class='diffstat'>