mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
cf4fb15b31
In order to support on-demand page table creation when moving the kernel for KASLR, we need to use kernel_ident_mapping_init() in the decompression code. This splits it out into its own file for use outside of init_64.c. Additionally, checking for __pa/__va defines is added since they need to be overridden in the decompression code. [kees: rewrote changelog] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: kernel-hardening@lists.openwall.com Cc: lasse.collin@tukaani.org Link: http://lkml.kernel.org/r/1462572095-11754-3-git-send-email-keescook@chromium.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
#ifndef _ASM_X86_PAGE_H
|
|
#define _ASM_X86_PAGE_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/page_types.h>
|
|
|
|
#ifdef CONFIG_X86_64
|
|
#include <asm/page_64.h>
|
|
#else
|
|
#include <asm/page_32.h>
|
|
#endif /* CONFIG_X86_64 */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct page;
|
|
|
|
#include <linux/range.h>
|
|
extern struct range pfn_mapped[];
|
|
extern int nr_pfn_mapped;
|
|
|
|
static inline void clear_user_page(void *page, unsigned long vaddr,
|
|
struct page *pg)
|
|
{
|
|
clear_page(page);
|
|
}
|
|
|
|
static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
|
|
struct page *topage)
|
|
{
|
|
copy_page(to, from);
|
|
}
|
|
|
|
#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
|
|
alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
|
|
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
|
|
|
|
#ifndef __pa
|
|
#define __pa(x) __phys_addr((unsigned long)(x))
|
|
#endif
|
|
|
|
#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
|
|
/* __pa_symbol should be used for C visible symbols.
|
|
This seems to be the official gcc blessed way to do such arithmetic. */
|
|
/*
|
|
* We need __phys_reloc_hide() here because gcc may assume that there is no
|
|
* overflow during __pa() calculation and can optimize it unexpectedly.
|
|
* Newer versions of gcc provide -fno-strict-overflow switch to handle this
|
|
* case properly. Once all supported versions of gcc understand it, we can
|
|
* remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated)
|
|
*/
|
|
#define __pa_symbol(x) \
|
|
__phys_addr_symbol(__phys_reloc_hide((unsigned long)(x)))
|
|
|
|
#ifndef __va
|
|
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
|
|
#endif
|
|
|
|
#define __boot_va(x) __va(x)
|
|
#define __boot_pa(x) __pa(x)
|
|
|
|
/*
|
|
* virt_to_page(kaddr) returns a valid pointer if and only if
|
|
* virt_addr_valid(kaddr) returns true.
|
|
*/
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
extern bool __virt_addr_valid(unsigned long kaddr);
|
|
#define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr))
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/getorder.h>
|
|
|
|
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_X86_PAGE_H */
|