pgalloc.h (762f99f4f3cb41a775b5157dd761217beba65873) pgalloc.h (ea4654e0885348f0faa47f6d7b44a08d75ad16e9)
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_PGALLOC_H
3#define _ASM_X86_PGALLOC_H
4
5#include <linux/threads.h>
6#include <linux/mm.h> /* for struct page */
7#include <linux/pagemap.h>
8

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29static inline void paravirt_release_p4d(unsigned long pfn) {}
30#endif
31
32/*
33 * Flags to use when allocating a user page table page.
34 */
35extern gfp_t __userpte_alloc_gfp;
36
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_PGALLOC_H
3#define _ASM_X86_PGALLOC_H
4
5#include <linux/threads.h>
6#include <linux/mm.h> /* for struct page */
7#include <linux/pagemap.h>
8

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29static inline void paravirt_release_p4d(unsigned long pfn) {}
30#endif
31
32/*
33 * Flags to use when allocating a user page table page.
34 */
35extern gfp_t __userpte_alloc_gfp;
36
37#ifdef CONFIG_PAGE_TABLE_ISOLATION
37#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
38/*
39 * Instead of one PGD, we acquire two PGDs. Being order-1, it is
40 * both 8k in size and 8k-aligned. That lets us just flip bit 12
41 * in a pointer to swap between the two 4k halves.
42 */
43#define PGD_ALLOCATION_ORDER 1
44#else
45#define PGD_ALLOCATION_ORDER 0

--- 136 unchanged lines hidden --- 		38/*
39 * Instead of one PGD, we acquire two PGDs. Being order-1, it is
40 * both 8k in size and 8k-aligned. That lets us just flip bit 12
41 * in a pointer to swap between the two 4k halves.
42 */
43#define PGD_ALLOCATION_ORDER 1
44#else
45#define PGD_ALLOCATION_ORDER 0

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