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65fddcfca8
The replacement of <asm/pgrable.h> with <linux/pgtable.h> made the include of the latter in the middle of asm includes. Fix this up with the aid of the below script and manual adjustments here and there. import sys import re if len(sys.argv) is not 3: print "USAGE: %s <file> <header>" % (sys.argv[0]) sys.exit(1) hdr_to_move="#include <linux/%s>" % sys.argv[2] moved = False in_hdrs = False with open(sys.argv[1], "r") as f: lines = f.readlines() for _line in lines: line = _line.rstrip(' ') if line == hdr_to_move: continue if line.startswith("#include <linux/"): in_hdrs = True elif not moved and in_hdrs: moved = True print hdr_to_move print line Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200514170327.31389-4-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Hibernation support for x86-64
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*
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* Copyright (c) 2007 Rafael J. Wysocki <rjw@sisk.pl>
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* Copyright (c) 2002 Pavel Machek <pavel@ucw.cz>
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* Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
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*/
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#include <linux/gfp.h>
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#include <linux/smp.h>
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#include <linux/suspend.h>
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#include <linux/scatterlist.h>
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#include <linux/kdebug.h>
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#include <linux/pgtable.h>
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#include <crypto/hash.h>
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#include <asm/e820/api.h>
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#include <asm/init.h>
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#include <asm/proto.h>
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#include <asm/page.h>
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#include <asm/mtrr.h>
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#include <asm/sections.h>
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#include <asm/suspend.h>
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#include <asm/tlbflush.h>
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static int set_up_temporary_text_mapping(pgd_t *pgd)
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{
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pmd_t *pmd;
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pud_t *pud;
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p4d_t *p4d = NULL;
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pgprot_t pgtable_prot = __pgprot(_KERNPG_TABLE);
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pgprot_t pmd_text_prot = __pgprot(__PAGE_KERNEL_LARGE_EXEC);
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/* Filter out unsupported __PAGE_KERNEL* bits: */
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pgprot_val(pmd_text_prot) &= __default_kernel_pte_mask;
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pgprot_val(pgtable_prot) &= __default_kernel_pte_mask;
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/*
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* The new mapping only has to cover the page containing the image
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* kernel's entry point (jump_address_phys), because the switch over to
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* it is carried out by relocated code running from a page allocated
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* specifically for this purpose and covered by the identity mapping, so
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* the temporary kernel text mapping is only needed for the final jump.
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* Moreover, in that mapping the virtual address of the image kernel's
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* entry point must be the same as its virtual address in the image
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* kernel (restore_jump_address), so the image kernel's
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* restore_registers() code doesn't find itself in a different area of
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* the virtual address space after switching over to the original page
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* tables used by the image kernel.
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*/
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if (pgtable_l5_enabled()) {
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p4d = (p4d_t *)get_safe_page(GFP_ATOMIC);
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if (!p4d)
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return -ENOMEM;
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}
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pud = (pud_t *)get_safe_page(GFP_ATOMIC);
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if (!pud)
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return -ENOMEM;
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pmd = (pmd_t *)get_safe_page(GFP_ATOMIC);
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if (!pmd)
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return -ENOMEM;
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set_pmd(pmd + pmd_index(restore_jump_address),
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__pmd((jump_address_phys & PMD_MASK) | pgprot_val(pmd_text_prot)));
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set_pud(pud + pud_index(restore_jump_address),
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__pud(__pa(pmd) | pgprot_val(pgtable_prot)));
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if (p4d) {
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p4d_t new_p4d = __p4d(__pa(pud) | pgprot_val(pgtable_prot));
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pgd_t new_pgd = __pgd(__pa(p4d) | pgprot_val(pgtable_prot));
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set_p4d(p4d + p4d_index(restore_jump_address), new_p4d);
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set_pgd(pgd + pgd_index(restore_jump_address), new_pgd);
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} else {
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/* No p4d for 4-level paging: point the pgd to the pud page table */
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pgd_t new_pgd = __pgd(__pa(pud) | pgprot_val(pgtable_prot));
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set_pgd(pgd + pgd_index(restore_jump_address), new_pgd);
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}
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return 0;
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}
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static void *alloc_pgt_page(void *context)
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{
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return (void *)get_safe_page(GFP_ATOMIC);
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}
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static int set_up_temporary_mappings(void)
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{
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struct x86_mapping_info info = {
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.alloc_pgt_page = alloc_pgt_page,
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.page_flag = __PAGE_KERNEL_LARGE_EXEC,
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.offset = __PAGE_OFFSET,
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};
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unsigned long mstart, mend;
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pgd_t *pgd;
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int result;
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int i;
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pgd = (pgd_t *)get_safe_page(GFP_ATOMIC);
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if (!pgd)
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return -ENOMEM;
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/* Prepare a temporary mapping for the kernel text */
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result = set_up_temporary_text_mapping(pgd);
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if (result)
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return result;
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/* Set up the direct mapping from scratch */
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for (i = 0; i < nr_pfn_mapped; i++) {
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mstart = pfn_mapped[i].start << PAGE_SHIFT;
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mend = pfn_mapped[i].end << PAGE_SHIFT;
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result = kernel_ident_mapping_init(&info, pgd, mstart, mend);
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if (result)
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return result;
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}
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temp_pgt = __pa(pgd);
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return 0;
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}
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asmlinkage int swsusp_arch_resume(void)
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{
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int error;
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/* We have got enough memory and from now on we cannot recover */
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error = set_up_temporary_mappings();
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if (error)
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return error;
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error = relocate_restore_code();
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if (error)
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return error;
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restore_image();
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return 0;
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}
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