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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irqflags.h (1193B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
      4 */
      5#ifndef _ASM_IRQFLAGS_H
      6#define _ASM_IRQFLAGS_H
      7
      8#include <asm/registers.h>
      9
     10static inline unsigned long arch_local_save_flags(void)
     11{
     12	return RDCTL(CTL_FSTATUS);
     13}
     14
     15/*
     16 * This will restore ALL status register flags, not only the interrupt
     17 * mask flag.
     18 */
     19static inline void arch_local_irq_restore(unsigned long flags)
     20{
     21	WRCTL(CTL_FSTATUS, flags);
     22}
     23
     24static inline void arch_local_irq_disable(void)
     25{
     26	unsigned long flags;
     27
     28	flags = arch_local_save_flags();
     29	arch_local_irq_restore(flags & ~STATUS_PIE);
     30}
     31
     32static inline void arch_local_irq_enable(void)
     33{
     34	unsigned long flags;
     35
     36	flags = arch_local_save_flags();
     37	arch_local_irq_restore(flags | STATUS_PIE);
     38}
     39
     40static inline int arch_irqs_disabled_flags(unsigned long flags)
     41{
     42	return (flags & STATUS_PIE) == 0;
     43}
     44
     45static inline int arch_irqs_disabled(void)
     46{
     47	return arch_irqs_disabled_flags(arch_local_save_flags());
     48}
     49
     50static inline unsigned long arch_local_irq_save(void)
     51{
     52	unsigned long flags;
     53
     54	flags = arch_local_save_flags();
     55	arch_local_irq_restore(flags & ~STATUS_PIE);
     56	return flags;
     57}
     58
     59#endif /* _ASM_IRQFLAGS_H */