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>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SCS_H
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#define _ASM_SCS_H
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#ifdef __ASSEMBLER__
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#include <asm/asm-offsets.h>
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#ifdef CONFIG_SHADOW_CALL_STACK
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/* Load init_shadow_call_stack to gp. */
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.macro scs_load_init_stack
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la gp, init_shadow_call_stack
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XIP_FIXUP_OFFSET gp
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.endm
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/* Load the per-CPU IRQ shadow call stack to gp. */
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.macro scs_load_irq_stack tmp
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load_per_cpu gp, irq_shadow_call_stack_ptr, \tmp
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.endm
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/* Load task_scs_sp(current) to gp. */
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.macro scs_load_current
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REG_L gp, TASK_TI_SCS_SP(tp)
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.endm
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/* Load task_scs_sp(current) to gp, but only if tp has changed. */
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.macro scs_load_current_if_task_changed prev
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beq \prev, tp, _skip_scs
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scs_load_current
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_skip_scs:
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.endm
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/* Save gp to task_scs_sp(current). */
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.macro scs_save_current
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REG_S gp, TASK_TI_SCS_SP(tp)
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.endm
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#else /* CONFIG_SHADOW_CALL_STACK */
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.macro scs_load_init_stack
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.endm
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.macro scs_load_irq_stack tmp
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.endm
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.macro scs_load_current
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.endm
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.macro scs_load_current_if_task_changed prev
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.endm
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.macro scs_save_current
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.endm
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#endif /* CONFIG_SHADOW_CALL_STACK */
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#endif /* __ASSEMBLER__ */
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#endif /* _ASM_SCS_H */
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