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scs: Move DEFINE_SCS macro into core code

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Defining static shadow call stacks is not architecture-specific, so move
the DEFINE_SCS() macro into the core header file.

Tested-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2020-05-15 16:17:12 +01:00
parent aa7a65ae5b
commit 871e100e43
2 changed files with 4 additions and 4 deletions
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4
arch/arm64/kernel/scs.c
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@ -8,10 +8,6 @@
#include <linux/percpu.h>
#include <linux/scs.h>
/* Allocate a static per-CPU shadow stack */
#define DEFINE_SCS(name) \
DEFINE_PER_CPU(unsigned long [SCS_SIZE/sizeof(long)], name) \
DEFINE_SCS(irq_shadow_call_stack);
#ifdef CONFIG_ARM_SDE_INTERFACE

4
include/linux/scs.h
View File

@ -26,6 +26,10 @@
/* An illegal pointer value to mark the end of the shadow stack. */
#define SCS_END_MAGIC (0x5f6UL + POISON_POINTER_DELTA)
/* Allocate a static per-CPU shadow stack */
#define DEFINE_SCS(name) \
DEFINE_PER_CPU(unsigned long [SCS_SIZE/sizeof(long)], name) \
#define task_scs(tsk) (task_thread_info(tsk)->scs_base)
#define task_scs_sp(tsk) (task_thread_info(tsk)->scs_sp)