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439dc2a117
This change adds per-CPU shadow call stacks for the SDEI handler. Similarly to how the kernel stacks are handled, we add separate shadow stacks for normal and critical events. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: James Morse <james.morse@arm.com> Tested-by: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
20 lines
462 B
C
20 lines
462 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Shadow Call Stack support.
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*
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* Copyright (C) 2019 Google LLC
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*/
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#include <linux/percpu.h>
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#include <asm/scs.h>
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/* Allocate a static per-CPU shadow stack */
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#define DEFINE_SCS(name) \
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DEFINE_PER_CPU(unsigned long [SCS_SIZE/sizeof(long)], name) \
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DEFINE_SCS(irq_shadow_call_stack);
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#ifdef CONFIG_ARM_SDE_INTERFACE
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DEFINE_SCS(sdei_shadow_call_stack_normal);
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DEFINE_SCS(sdei_shadow_call_stack_critical);
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#endif
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