tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_TLB_H
3#define _ASM_X86_TLB_H
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)
8
9#define tlb_flush(tlb) \
10{ \
11 if (!tlb->fullmm && !tlb->need_flush_all) \
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}
16
17#include <asm-generic/tlb.h>
18
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 */
28static inline void __tlb_remove_table(void *table)
29{
30 free_page_and_swap_cache(table);
31}
32
33#endif /* _ASM_X86_TLB_H */