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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aclinuxex.h (3333B)

      1/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
      2/******************************************************************************
      3 *
      4 * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux
      5 *
      6 * Copyright (C) 2000 - 2022, Intel Corp.
      7 *
      8 *****************************************************************************/
      9
     10#ifndef __ACLINUXEX_H__
     11#define __ACLINUXEX_H__
     12
     13#ifdef __KERNEL__
     14
     15#ifndef ACPI_USE_NATIVE_DIVIDE
     16
     17#ifndef ACPI_DIV_64_BY_32
     18#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
     19	do { \
     20		u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \
     21		(r32) = do_div ((__n), (d32)); \
     22		(q32) = (u32) (__n); \
     23	} while (0)
     24#endif
     25
     26#ifndef ACPI_SHIFT_RIGHT_64
     27#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
     28	do { \
     29		(n_lo) >>= 1; \
     30		(n_lo) |= (((n_hi) & 1) << 31); \
     31		(n_hi) >>= 1; \
     32	} while (0)
     33#endif
     34
     35#endif
     36
     37/*
     38 * Overrides for in-kernel ACPICA
     39 */
     40acpi_status ACPI_INIT_FUNCTION acpi_os_initialize(void);
     41
     42acpi_status acpi_os_terminate(void);
     43
     44/*
     45 * The irqs_disabled() check is for resume from RAM.
     46 * Interrupts are off during resume, just like they are for boot.
     47 * However, boot has  (system_state != SYSTEM_RUNNING)
     48 * to quiet __might_sleep() in kmalloc() and resume does not.
     49 */
     50static inline void *acpi_os_allocate(acpi_size size)
     51{
     52	return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
     53}
     54
     55static inline void *acpi_os_allocate_zeroed(acpi_size size)
     56{
     57	return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
     58}
     59
     60static inline void acpi_os_free(void *memory)
     61{
     62	kfree(memory);
     63}
     64
     65static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
     66{
     67	return kmem_cache_zalloc(cache,
     68				 irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
     69}
     70
     71static inline acpi_thread_id acpi_os_get_thread_id(void)
     72{
     73	return (acpi_thread_id) (unsigned long)current;
     74}
     75
     76/*
     77 * When lockdep is enabled, the spin_lock_init() macro stringifies it's
     78 * argument and uses that as a name for the lock in debugging.
     79 * By executing spin_lock_init() in a macro the key changes from "lock" for
     80 * all locks to the name of the argument of acpi_os_create_lock(), which
     81 * prevents lockdep from reporting false positives for ACPICA locks.
     82 */
     83#define acpi_os_create_lock(__handle) \
     84	({ \
     85		spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \
     86		if (lock) { \
     87			*(__handle) = lock; \
     88			spin_lock_init(*(__handle)); \
     89		} \
     90		lock ? AE_OK : AE_NO_MEMORY; \
     91	})
     92
     93
     94#define acpi_os_create_raw_lock(__handle) \
     95	({ \
     96		raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \
     97		if (lock) { \
     98			*(__handle) = lock; \
     99			raw_spin_lock_init(*(__handle)); \
    100		} \
    101		lock ? AE_OK : AE_NO_MEMORY; \
    102	})
    103
    104static inline acpi_cpu_flags acpi_os_acquire_raw_lock(acpi_raw_spinlock lockp)
    105{
    106	acpi_cpu_flags flags;
    107
    108	raw_spin_lock_irqsave(lockp, flags);
    109	return flags;
    110}
    111
    112static inline void acpi_os_release_raw_lock(acpi_raw_spinlock lockp,
    113					    acpi_cpu_flags flags)
    114{
    115	raw_spin_unlock_irqrestore(lockp, flags);
    116}
    117
    118static inline void acpi_os_delete_raw_lock(acpi_raw_spinlock handle)
    119{
    120	ACPI_FREE(handle);
    121}
    122
    123static inline u8 acpi_os_readable(void *pointer, acpi_size length)
    124{
    125	return TRUE;
    126}
    127
    128static inline acpi_status acpi_os_initialize_debugger(void)
    129{
    130	return AE_OK;
    131}
    132
    133static inline void acpi_os_terminate_debugger(void)
    134{
    135	return;
    136}
    137
    138/*
    139 * OSL interfaces added by Linux
    140 */
    141
    142#endif				/* __KERNEL__ */
    143
    144#endif				/* __ACLINUXEX_H__ */