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arm64: mte: Restore the GCR_EL1 register after a suspend

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The CPU resume/suspend routines only take care of the common system
registers. Restore GCR_EL1 in addition via the __cpu_suspend_exit()
function.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Catalin Marinas
2020-04-17 18:29:35 +01:00
parent af5ce95282
commit 39d08e8318
3 changed files with 16 additions and 0 deletions
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4
arch/arm64/include/asm/mte.h
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@@ -22,6 +22,7 @@ void mte_sync_tags(pte_t *ptep, pte_t pte);
void mte_copy_page_tags(void *kto, const void *kfrom);
void flush_mte_state(void);
void mte_thread_switch(struct task_struct *next);
void mte_suspend_exit(void);
long set_mte_ctrl(unsigned long arg);
long get_mte_ctrl(void);
@@ -42,6 +43,9 @@ static inline void flush_mte_state(void)
static inline void mte_thread_switch(struct task_struct *next)
{
}
static inline void mte_suspend_exit(void)
{
}
static inline long set_mte_ctrl(unsigned long arg)
{
return 0;