Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 2006, 2010
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef __ASM_IRQFLAGS_H
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#define __ASM_IRQFLAGS_H
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#include <linux/types.h>
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#define ARCH_IRQ_ENABLED (3UL << (BITS_PER_LONG - 8))
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/* store then OR system mask. */
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#define __arch_local_irq_stosm(__or) \
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({ \
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unsigned long __mask; \
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asm volatile( \
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" stosm %0,%1" \
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: "=Q" (__mask) : "i" (__or) : "memory"); \
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__mask; \
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})
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/* store then AND system mask. */
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#define __arch_local_irq_stnsm(__and) \
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({ \
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unsigned long __mask; \
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asm volatile( \
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" stnsm %0,%1" \
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: "=Q" (__mask) : "i" (__and) : "memory"); \
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__mask; \
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})
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/* set system mask. */
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static __always_inline void __arch_local_irq_ssm(unsigned long flags)
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{
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asm volatile("ssm %0" : : "Q" (flags) : "memory");
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}
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#ifdef CONFIG_KMSAN
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#define arch_local_irq_attributes noinline notrace __no_sanitize_memory __maybe_unused
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#else
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#define arch_local_irq_attributes __always_inline
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#endif
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static arch_local_irq_attributes unsigned long arch_local_save_flags(void)
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{
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return __arch_local_irq_stnsm(0xff);
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}
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static arch_local_irq_attributes unsigned long arch_local_irq_save(void)
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{
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return __arch_local_irq_stnsm(0xfc);
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}
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static __always_inline void arch_local_irq_disable(void)
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{
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arch_local_irq_save();
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}
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static arch_local_irq_attributes void arch_local_irq_enable_external(void)
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{
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__arch_local_irq_stosm(0x01);
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}
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static arch_local_irq_attributes void arch_local_irq_enable(void)
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{
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__arch_local_irq_stosm(0x03);
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}
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/* This only restores external and I/O interrupt state */
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static __always_inline void arch_local_irq_restore(unsigned long flags)
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{
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/* only disabled->disabled and disabled->enabled is valid */
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if (flags & ARCH_IRQ_ENABLED)
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arch_local_irq_enable();
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}
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static __always_inline bool arch_irqs_disabled_flags(unsigned long flags)
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{
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return !(flags & ARCH_IRQ_ENABLED);
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}
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static __always_inline bool arch_irqs_disabled(void)
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{
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return arch_irqs_disabled_flags(arch_local_save_flags());
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}
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#endif /* __ASM_IRQFLAGS_H */
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