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authorEric W. Biederman <ebiederm@xmission.com>2005-07-29 13:25:28 -0600
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-29 13:12:49 -0700
commit8bf2755664bfe03a414e7ec02d9f16a3d5beb60d (patch)
tree4cf707d59b69c153a29d93e90fa5dc53baec64a0 /arch
parent36c4fd23cc06f81d68ee968c4c1bf1cebb3dcea5 (diff)
[PATCH] x86_64 machine_kexec: Use standard pagetable helpers
Use the standard hardware page table manipulation macros. This is possible now that linux works with all 4 levels of the page tables. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86_64/kernel/machine_kexec.c67
1 files changed, 25 insertions, 42 deletions
diff --git a/arch/x86_64/kernel/machine_kexec.c b/arch/x86_64/kernel/machine_kexec.c
index 717f7db4b532..89fab51e20f4 100644
--- a/arch/x86_64/kernel/machine_kexec.c
+++ b/arch/x86_64/kernel/machine_kexec.c
@@ -8,43 +8,26 @@
#include <linux/mm.h>
#include <linux/kexec.h>
-#include <linux/delay.h>
#include <linux/string.h>
#include <linux/reboot.h>
-#include <asm/pda.h>
#include <asm/pgtable.h>
-#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
-#include <asm/apic.h>
-#include <asm/cpufeature.h>
-#include <asm/hw_irq.h>
-
-#define LEVEL0_SIZE (1UL << 12UL)
-#define LEVEL1_SIZE (1UL << 21UL)
-#define LEVEL2_SIZE (1UL << 30UL)
-#define LEVEL3_SIZE (1UL << 39UL)
-#define LEVEL4_SIZE (1UL << 48UL)
-
-#define L0_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define L1_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE)
-#define L2_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define L3_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
-
-static void init_level2_page(u64 *level2p, unsigned long addr)
+
+static void init_level2_page(pmd_t *level2p, unsigned long addr)
{
unsigned long end_addr;
addr &= PAGE_MASK;
- end_addr = addr + LEVEL2_SIZE;
+ end_addr = addr + PUD_SIZE;
while (addr < end_addr) {
- *(level2p++) = addr | L1_ATTR;
- addr += LEVEL1_SIZE;
+ set_pmd(level2p++, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC));
+ addr += PMD_SIZE;
}
}
-static int init_level3_page(struct kimage *image, u64 *level3p,
+static int init_level3_page(struct kimage *image, pud_t *level3p,
unsigned long addr, unsigned long last_addr)
{
unsigned long end_addr;
@@ -52,32 +35,32 @@ static int init_level3_page(struct kimage *image, u64 *level3p,
result = 0;
addr &= PAGE_MASK;
- end_addr = addr + LEVEL3_SIZE;
+ end_addr = addr + PGDIR_SIZE;
while ((addr < last_addr) && (addr < end_addr)) {
struct page *page;
- u64 *level2p;
+ pmd_t *level2p;
page = kimage_alloc_control_pages(image, 0);
if (!page) {
result = -ENOMEM;
goto out;
}
- level2p = (u64 *)page_address(page);
+ level2p = (pmd_t *)page_address(page);
init_level2_page(level2p, addr);
- *(level3p++) = __pa(level2p) | L2_ATTR;
- addr += LEVEL2_SIZE;
+ set_pud(level3p++, __pud(__pa(level2p) | _KERNPG_TABLE));
+ addr += PUD_SIZE;
}
/* clear the unused entries */
while (addr < end_addr) {
- *(level3p++) = 0;
- addr += LEVEL2_SIZE;
+ pud_clear(level3p++);
+ addr += PUD_SIZE;
}
out:
return result;
}
-static int init_level4_page(struct kimage *image, u64 *level4p,
+static int init_level4_page(struct kimage *image, pgd_t *level4p,
unsigned long addr, unsigned long last_addr)
{
unsigned long end_addr;
@@ -85,28 +68,28 @@ static int init_level4_page(struct kimage *image, u64 *level4p,
result = 0;
addr &= PAGE_MASK;
- end_addr = addr + LEVEL4_SIZE;
+ end_addr = addr + (PTRS_PER_PGD * PGDIR_SIZE);
while ((addr < last_addr) && (addr < end_addr)) {
struct page *page;
- u64 *level3p;
+ pud_t *level3p;
page = kimage_alloc_control_pages(image, 0);
if (!page) {
result = -ENOMEM;
goto out;
}
- level3p = (u64 *)page_address(page);
+ level3p = (pud_t *)page_address(page);
result = init_level3_page(image, level3p, addr, last_addr);
if (result) {
goto out;
}
- *(level4p++) = __pa(level3p) | L3_ATTR;
- addr += LEVEL3_SIZE;
+ set_pgd(level4p++, __pgd(__pa(level3p) | _KERNPG_TABLE));
+ addr += PGDIR_SIZE;
}
/* clear the unused entries */
while (addr < end_addr) {
- *(level4p++) = 0;
- addr += LEVEL3_SIZE;
+ pgd_clear(level4p++);
+ addr += PGDIR_SIZE;
}
out:
return result;
@@ -115,8 +98,8 @@ out:
static int init_pgtable(struct kimage *image, unsigned long start_pgtable)
{
- u64 *level4p;
- level4p = (u64 *)__va(start_pgtable);
+ pgd_t *level4p;
+ level4p = (pgd_t *)__va(start_pgtable);
return init_level4_page(image, level4p, 0, end_pfn << PAGE_SHIFT);
}
@@ -176,7 +159,7 @@ int machine_kexec_prepare(struct kimage *image)
/* Calculate the offsets */
start_pgtable = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
- control_code_buffer = start_pgtable + 4096UL;
+ control_code_buffer = start_pgtable + PAGE_SIZE;
/* Setup the identity mapped 64bit page table */
result = init_pgtable(image, start_pgtable);
@@ -212,7 +195,7 @@ NORET_TYPE void machine_kexec(struct kimage *image)
/* Calculate the offsets */
page_list = image->head;
start_pgtable = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
- control_code_buffer = start_pgtable + 4096UL;
+ control_code_buffer = start_pgtable + PAGE_SIZE;
/* Set the low half of the page table to my identity mapped
* page table for kexec. Leave the high half pointing at the