cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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smp_types.h (1382B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __LINUX_SMP_TYPES_H
      3#define __LINUX_SMP_TYPES_H
      4
      5#include <linux/llist.h>
      6
      7enum {
      8	CSD_FLAG_LOCK		= 0x01,
      9
     10	IRQ_WORK_PENDING	= 0x01,
     11	IRQ_WORK_BUSY		= 0x02,
     12	IRQ_WORK_LAZY		= 0x04, /* No IPI, wait for tick */
     13	IRQ_WORK_HARD_IRQ	= 0x08, /* IRQ context on PREEMPT_RT */
     14
     15	IRQ_WORK_CLAIMED	= (IRQ_WORK_PENDING | IRQ_WORK_BUSY),
     16
     17	CSD_TYPE_ASYNC		= 0x00,
     18	CSD_TYPE_SYNC		= 0x10,
     19	CSD_TYPE_IRQ_WORK	= 0x20,
     20	CSD_TYPE_TTWU		= 0x30,
     21
     22	CSD_FLAG_TYPE_MASK	= 0xF0,
     23};
     24
     25/*
     26 * struct __call_single_node is the primary type on
     27 * smp.c:call_single_queue.
     28 *
     29 * flush_smp_call_function_queue() only reads the type from
     30 * __call_single_node::u_flags as a regular load, the above
     31 * (anonymous) enum defines all the bits of this word.
     32 *
     33 * Other bits are not modified until the type is known.
     34 *
     35 * CSD_TYPE_SYNC/ASYNC:
     36 *	struct {
     37 *		struct llist_node node;
     38 *		unsigned int flags;
     39 *		smp_call_func_t func;
     40 *		void *info;
     41 *	};
     42 *
     43 * CSD_TYPE_IRQ_WORK:
     44 *	struct {
     45 *		struct llist_node node;
     46 *		atomic_t flags;
     47 *		void (*func)(struct irq_work *);
     48 *	};
     49 *
     50 * CSD_TYPE_TTWU:
     51 *	struct {
     52 *		struct llist_node node;
     53 *		unsigned int flags;
     54 *	};
     55 *
     56 */
     57
     58struct __call_single_node {
     59	struct llist_node	llist;
     60	union {
     61		unsigned int	u_flags;
     62		atomic_t	a_flags;
     63	};
     64#ifdef CONFIG_64BIT
     65	u16 src, dst;
     66#endif
     67};
     68
     69#endif /* __LINUX_SMP_TYPES_H */