cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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page.h (2510B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_X86_PAGE_H
      3#define _ASM_X86_PAGE_H
      4
      5#include <linux/types.h>
      6
      7#ifdef __KERNEL__
      8
      9#include <asm/page_types.h>
     10
     11#ifdef CONFIG_X86_64
     12#include <asm/page_64.h>
     13#else
     14#include <asm/page_32.h>
     15#endif	/* CONFIG_X86_64 */
     16
     17#ifndef __ASSEMBLY__
     18
     19struct page;
     20
     21#include <linux/range.h>
     22extern struct range pfn_mapped[];
     23extern int nr_pfn_mapped;
     24
     25static inline void clear_user_page(void *page, unsigned long vaddr,
     26				   struct page *pg)
     27{
     28	clear_page(page);
     29}
     30
     31static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
     32				  struct page *topage)
     33{
     34	copy_page(to, from);
     35}
     36
     37#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
     38	alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
     39#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
     40
     41#ifndef __pa
     42#define __pa(x)		__phys_addr((unsigned long)(x))
     43#endif
     44
     45#define __pa_nodebug(x)	__phys_addr_nodebug((unsigned long)(x))
     46/* __pa_symbol should be used for C visible symbols.
     47   This seems to be the official gcc blessed way to do such arithmetic. */
     48/*
     49 * We need __phys_reloc_hide() here because gcc may assume that there is no
     50 * overflow during __pa() calculation and can optimize it unexpectedly.
     51 * Newer versions of gcc provide -fno-strict-overflow switch to handle this
     52 * case properly. Once all supported versions of gcc understand it, we can
     53 * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated)
     54 */
     55#define __pa_symbol(x) \
     56	__phys_addr_symbol(__phys_reloc_hide((unsigned long)(x)))
     57
     58#ifndef __va
     59#define __va(x)			((void *)((unsigned long)(x)+PAGE_OFFSET))
     60#endif
     61
     62#define __boot_va(x)		__va(x)
     63#define __boot_pa(x)		__pa(x)
     64
     65/*
     66 * virt_to_page(kaddr) returns a valid pointer if and only if
     67 * virt_addr_valid(kaddr) returns true.
     68 */
     69#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
     70#define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
     71extern bool __virt_addr_valid(unsigned long kaddr);
     72#define virt_addr_valid(kaddr)	__virt_addr_valid((unsigned long) (kaddr))
     73
     74static __always_inline u64 __canonical_address(u64 vaddr, u8 vaddr_bits)
     75{
     76	return ((s64)vaddr << (64 - vaddr_bits)) >> (64 - vaddr_bits);
     77}
     78
     79static __always_inline u64 __is_canonical_address(u64 vaddr, u8 vaddr_bits)
     80{
     81	return __canonical_address(vaddr, vaddr_bits) == vaddr;
     82}
     83
     84#endif	/* __ASSEMBLY__ */
     85
     86#include <asm-generic/memory_model.h>
     87#include <asm-generic/getorder.h>
     88
     89#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
     90
     91#endif	/* __KERNEL__ */
     92#endif /* _ASM_X86_PAGE_H */