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Diffstat (limited to 'arch/x86/kernel/machine_kexec_32.c')
-rw-r--r--arch/x86/kernel/machine_kexec_32.c87
1 files changed, 25 insertions, 62 deletions
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 5b19e4d78b00..1f325304c4a8 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -1,54 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* handle transition of Linux booting another kernel
* Copyright (C) 2002-2005 Eric Biederman <ebiederm@xmission.com>
- *
- * This source code is licensed under the GNU General Public License,
- * Version 2. See the file COPYING for more details.
*/
#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/delay.h>
-#include <linux/init.h>
#include <linux/numa.h>
#include <linux/ftrace.h>
#include <linux/suspend.h>
#include <linux/gfp.h>
#include <linux/io.h>
-#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
#include <asm/apic.h>
+#include <asm/io_apic.h>
#include <asm/cpufeature.h>
#include <asm/desc.h>
-#include <asm/cacheflush.h>
+#include <asm/set_memory.h>
#include <asm/debugreg.h>
-static void set_idt(void *newidt, __u16 limit)
-{
- struct desc_ptr curidt;
-
- /* ia32 supports unaliged loads & stores */
- curidt.size = limit;
- curidt.address = (unsigned long)newidt;
-
- load_idt(&curidt);
-}
-
-
-static void set_gdt(void *newgdt, __u16 limit)
-{
- struct desc_ptr curgdt;
-
- /* ia32 supports unaligned loads & stores */
- curgdt.size = limit;
- curgdt.address = (unsigned long)newgdt;
-
- load_gdt(&curgdt);
-}
-
static void load_segments(void)
{
#define __STR(X) #X
@@ -60,8 +34,6 @@ static void load_segments(void)
"\tmovl $"STR(__KERNEL_DS)",%%eax\n"
"\tmovl %%eax,%%ds\n"
"\tmovl %%eax,%%es\n"
- "\tmovl %%eax,%%fs\n"
- "\tmovl %%eax,%%gs\n"
"\tmovl %%eax,%%ss\n"
: : : "eax", "memory");
#undef STR
@@ -70,18 +42,24 @@ static void load_segments(void)
static void machine_kexec_free_page_tables(struct kimage *image)
{
- free_page((unsigned long)image->arch.pgd);
+ free_pages((unsigned long)image->arch.pgd, pgd_allocation_order());
+ image->arch.pgd = NULL;
#ifdef CONFIG_X86_PAE
free_page((unsigned long)image->arch.pmd0);
+ image->arch.pmd0 = NULL;
free_page((unsigned long)image->arch.pmd1);
+ image->arch.pmd1 = NULL;
#endif
free_page((unsigned long)image->arch.pte0);
+ image->arch.pte0 = NULL;
free_page((unsigned long)image->arch.pte1);
+ image->arch.pte1 = NULL;
}
static int machine_kexec_alloc_page_tables(struct kimage *image)
{
- image->arch.pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
+ image->arch.pgd = (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ pgd_allocation_order());
#ifdef CONFIG_X86_PAE
image->arch.pmd0 = (pmd_t *)get_zeroed_page(GFP_KERNEL);
image->arch.pmd1 = (pmd_t *)get_zeroed_page(GFP_KERNEL);
@@ -93,7 +71,6 @@ static int machine_kexec_alloc_page_tables(struct kimage *image)
!image->arch.pmd0 || !image->arch.pmd1 ||
#endif
!image->arch.pte0 || !image->arch.pte1) {
- machine_kexec_free_page_tables(image);
return -ENOMEM;
}
return 0;
@@ -103,6 +80,7 @@ static void machine_kexec_page_table_set_one(
pgd_t *pgd, pmd_t *pmd, pte_t *pte,
unsigned long vaddr, unsigned long paddr)
{
+ p4d_t *p4d;
pud_t *pud;
pgd += pgd_index(vaddr);
@@ -110,7 +88,8 @@ static void machine_kexec_page_table_set_one(
if (!(pgd_val(*pgd) & _PAGE_PRESENT))
set_pgd(pgd, __pgd(__pa(pmd) | _PAGE_PRESENT));
#endif
- pud = pud_offset(pgd, vaddr);
+ p4d = p4d_offset(pgd, vaddr);
+ pud = pud_offset(p4d, vaddr);
pmd = pmd_offset(pud, vaddr);
if (!(pmd_val(*pmd) & _PAGE_PRESENT))
set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
@@ -157,7 +136,7 @@ int machine_kexec_prepare(struct kimage *image)
{
int error;
- set_pages_x(image->control_code_page, 1);
+ set_memory_x((unsigned long)page_address(image->control_code_page), 1);
error = machine_kexec_alloc_page_tables(image);
if (error)
return error;
@@ -171,7 +150,7 @@ int machine_kexec_prepare(struct kimage *image)
*/
void machine_kexec_cleanup(struct kimage *image)
{
- set_pages_nx(image->control_code_page, 1);
+ set_memory_nx((unsigned long)page_address(image->control_code_page), 1);
machine_kexec_free_page_tables(image);
}
@@ -181,15 +160,10 @@ void machine_kexec_cleanup(struct kimage *image)
*/
void machine_kexec(struct kimage *image)
{
+ relocate_kernel_fn *relocate_kernel_ptr;
unsigned long page_list[PAGES_NR];
void *control_page;
int save_ftrace_enabled;
- asmlinkage unsigned long
- (*relocate_kernel_ptr)(unsigned long indirection_page,
- unsigned long control_page,
- unsigned long start_address,
- unsigned int has_pae,
- unsigned int preserve_context);
#ifdef CONFIG_KEXEC_JUMP
if (image->preserve_context)
@@ -207,11 +181,11 @@ void machine_kexec(struct kimage *image)
/*
* We need to put APICs in legacy mode so that we can
* get timer interrupts in second kernel. kexec/kdump
- * paths already have calls to disable_IO_APIC() in
- * one form or other. kexec jump path also need
- * one.
+ * paths already have calls to restore_boot_irq_mode()
+ * in one form or other. kexec jump path also need one.
*/
- disable_IO_APIC();
+ clear_IO_APIC();
+ restore_boot_irq_mode();
#endif
}
@@ -242,13 +216,14 @@ void machine_kexec(struct kimage *image)
* The gdt & idt are now invalid.
* If you want to load them you must set up your own idt & gdt.
*/
- set_gdt(phys_to_virt(0), 0);
- set_idt(phys_to_virt(0), 0);
+ native_idt_invalidate();
+ native_gdt_invalidate();
/* now call it */
image->start = relocate_kernel_ptr((unsigned long)image->head,
(unsigned long)page_list,
- image->start, cpu_has_pae,
+ image->start,
+ boot_cpu_has(X86_FEATURE_PAE),
image->preserve_context);
#ifdef CONFIG_KEXEC_JUMP
@@ -258,15 +233,3 @@ void machine_kexec(struct kimage *image)
__ftrace_enabled_restore(save_ftrace_enabled);
}
-
-void arch_crash_save_vmcoreinfo(void)
-{
-#ifdef CONFIG_NUMA
- VMCOREINFO_SYMBOL(node_data);
- VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
-#endif
-#ifdef CONFIG_X86_PAE
- VMCOREINFO_CONFIG(X86_PAE);
-#endif
-}
-
generated by cgit (git 2.34.1) at 2025-12-25 08:04:46 +0000