/*
 *		INETPEER - A storage for permanent information about peers
 *
 *  Authors:	Andrey V. Savochkin <saw@msu.ru>
 */

#ifndef _NET_INETPEER_H
#define _NET_INETPEER_H

#include <linux/types.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/spinlock.h>
#include <linux/rtnetlink.h>
#include <net/ipv6.h>
#include <linux/atomic.h>

/* IPv4 address key for cache lookups */
struct ipv4_addr_key {
	__be32	addr;
	int	vif;
};

#define INETPEER_MAXKEYSZ   (sizeof(struct in6_addr) / sizeof(u32))

struct inetpeer_addr {
	union {
		struct ipv4_addr_key	a4;
		struct in6_addr		a6;
		u32			key[INETPEER_MAXKEYSZ];
	};
	__u16				family;
};

struct inet_peer {
	/* group together avl_left,avl_right,v4daddr to speedup lookups */
	struct inet_peer __rcu	*avl_left, *avl_right;
	struct inetpeer_addr	daddr;
	__u32			avl_height;

	u32			metrics[RTAX_MAX];
	u32			rate_tokens;	/* rate limiting for ICMP */
	unsigned long		rate_last;
	union {
		struct list_head	gc_list;
		struct rcu_head     gc_rcu;
	};
	/*
	 * Once inet_peer is queued for deletion (refcnt == -1), following field
	 * is not available: rid
	 * We can share memory with rcu_head to help keep inet_peer small.
	 */
	union {
		struct {
			atomic_t			rid;		/* Frag reception counter */
		};
		struct rcu_head         rcu;
		struct inet_peer	*gc_next;
	};

	/* following fields might be frequently dirtied */
	__u32			dtime;	/* the time of last use of not referenced entries */
	atomic_t		refcnt;
};

struct inet_peer_base {
	struct inet_peer __rcu	*root;
	seqlock_t		lock;
	int			total;
};

void inet_peer_base_init(struct inet_peer_base *);

void inet_initpeers(void) __init;

#define INETPEER_METRICS_NEW	(~(u32) 0)

static inline void inetpeer_set_addr_v4(struct inetpeer_addr *iaddr, __be32 ip)
{
	iaddr->a4.addr = ip;
	iaddr->a4.vif = 0;
	iaddr->family = AF_INET;
}

static inline __be32 inetpeer_get_addr_v4(struct inetpeer_addr *iaddr)
{
	return iaddr->a4.addr;
}

static inline void inetpeer_set_addr_v6(struct inetpeer_addr *iaddr,
					struct in6_addr *in6)
{
	iaddr->a6 = *in6;
	iaddr->family = AF_INET6;
}

static inline struct in6_addr *inetpeer_get_addr_v6(struct inetpeer_addr *iaddr)
{
	return &iaddr->a6;
}

/* can be called with or without local BH being disabled */
struct inet_peer *inet_getpeer(struct inet_peer_base *base,
			       const struct inetpeer_addr *daddr,
			       int create);

static inline struct inet_peer *inet_getpeer_v4(struct inet_peer_base *base,
						__be32 v4daddr,
						int vif, int create)
{
	struct inetpeer_addr daddr;

	daddr.a4.addr = v4daddr;
	daddr.a4.vif = vif;
	daddr.family = AF_INET;
	return inet_getpeer(base, &daddr, create);
}

static inline struct inet_peer *inet_getpeer_v6(struct inet_peer_base *base,
						const struct in6_addr *v6daddr,
						int create)
{
	struct inetpeer_addr daddr;

	daddr.a6 = *v6daddr;
	daddr.family = AF_INET6;
	return inet_getpeer(base, &daddr, create);
}

static inline int inetpeer_addr_cmp(const struct inetpeer_addr *a,
				    const struct inetpeer_addr *b)
{
	int i, n;

	if (a->family == AF_INET)
		n = sizeof(a->a4) / sizeof(u32);
	else
		n = sizeof(a->a6) / sizeof(u32);

	for (i = 0; i < n; i++) {
		if (a->key[i] == b->key[i])
			continue;
		if (a->key[i] < b->key[i])
			return -1;
		return 1;
	}

	return 0;
}

/* can be called from BH context or outside */
void inet_putpeer(struct inet_peer *p);
bool inet_peer_xrlim_allow(struct inet_peer *peer, int timeout);

void inetpeer_invalidate_tree(struct inet_peer_base *);

#endif /* _NET_INETPEER_H */
204f259ba09c'>x86</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86/westmereep-sp?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>westmereep-sp</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c26665ab5c49ad3e142e0f054ca3204f259ba09c'/><table><tr><td colspan='2'/></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/tools/perf/pmu-events/arch/x86/westmereep-sp?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>c26665ab5c49ad3e142e0f054ca3204f259ba09c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/pmu-events/arch/x86/westmereep-sp?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/tools/perf/pmu-events/arch/x86/westmereep-sp?id=c26665ab5c49ad3e142e0f054ca3204f259ba09c'>tools/perf/pmu-events/arch/x86/westmereep-sp</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86/westmereep-sp?id=7a308bb3016f57e5be11a677d15b821536419d36'>7a308bb3016f57e5be11a677d15b821536419d36</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/pmu-events/arch/x86/westmereep-sp?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 'tools/perf/pmu-events/arch/x86/westmereep-sp')</div><table summary='diffstat' class='diffstat'>