[thirdparty/kernel/linux.git] / arch / x86 / include / asm / tlb.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_TLB_H
#define _ASM_X86_TLB_H

#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)

#define tlb_flush(tlb)							\
{									\
	if (!tlb->fullmm && !tlb->need_flush_all) 			\
		flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end, 0UL);	\
	else								\
		flush_tlb_mm_range(tlb->mm, 0UL, TLB_FLUSH_ALL, 0UL);	\
}

#include <asm-generic/tlb.h>

/*
 * While x86 architecture in general requires an IPI to perform TLB
 * shootdown, enablement code for several hypervisors overrides
 * .flush_tlb_others hook in pv_mmu_ops and implements it by issuing
 * a hypercall. To keep software pagetable walkers safe in this case we
 * switch to RCU based table free (HAVE_RCU_TABLE_FREE). See the comment
 * below 'ifdef CONFIG_HAVE_RCU_TABLE_FREE' in include/asm-generic/tlb.h
 * for more details.
 */
static inline void __tlb_remove_table(void *table)
{
	free_page_and_swap_cache(table);
}

#endif /* _ASM_X86_TLB_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1965aae3 PA	2	#ifndef _ASM_X86_TLB_H
1965aae3 PA	3	#define _ASM_X86_TLB_H
01749f6d TG	4
	5	#define tlb_start_vma(tlb, vma) do { } while (0)
	6	#define tlb_end_vma(tlb, vma) do { } while (0)
	7	#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
611ae8e3 AS	8
	9	#define tlb_flush(tlb) \
	10	{ \
1de14c3c	11	if (!tlb->fullmm && !tlb->need_flush_all) \
611ae8e3 AS	12	flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end, 0UL); \
	13	else \
	14	flush_tlb_mm_range(tlb->mm, 0UL, TLB_FLUSH_ALL, 0UL); \
	15	}
01749f6d TG	16
	17	#include <asm-generic/tlb.h>
	18
9e52fc2b VK	19	/*
	20	* While x86 architecture in general requires an IPI to perform TLB
	21	* shootdown, enablement code for several hypervisors overrides
	22	* .flush_tlb_others hook in pv_mmu_ops and implements it by issuing
	23	* a hypercall. To keep software pagetable walkers safe in this case we
	24	* switch to RCU based table free (HAVE_RCU_TABLE_FREE). See the comment
	25	* below 'ifdef CONFIG_HAVE_RCU_TABLE_FREE' in include/asm-generic/tlb.h
	26	* for more details.
	27	*/
	28	static inline void __tlb_remove_table(void *table)
	29	{
	30	free_page_and_swap_cache(table);
	31	}
	32
1965aae3	33	#endif /* _ASM_X86_TLB_H */