disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/arch/parisc/include/asm/mmu_context.h
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@@ -5,8 +5,7 @@
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 #include <linux/mm.h>
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 #include <linux/sched.h>
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 #include <linux/atomic.h>
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-#include <asm/pgalloc.h>
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-#include <asm/pgtable.h>
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+#include <linux/spinlock.h>
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 #include <asm-generic/mm_hooks.h>
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 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
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@@ -54,6 +53,12 @@
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 		struct mm_struct *next, struct task_struct *tsk)
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 {
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 	if (prev != next) {
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+#ifdef CONFIG_TLB_PTLOCK
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+		/* put physical address of page_table_lock in cr28 (tr4)
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+		   for TLB faults */
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+		spinlock_t *pgd_lock = &next->page_table_lock;
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+		mtctl(__pa(__ldcw_align(&pgd_lock->rlock.raw_lock)), 28);
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+#endif
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 		mtctl(__pa(next->pgd), 25);
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 		load_context(next->context);
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 	}