/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include "linux/mm.h"
-#include "asm/page.h"
-#include "asm/pgalloc.h"
+#include "asm/pgtable.h"
#include "asm/tlbflush.h"
-#include "choose-mode.h"
-#include "mode_kern.h"
-#include "user_util.h"
-#include "tlb.h"
-#include "mem.h"
+#include "as-layout.h"
#include "mem_user.h"
#include "os.h"
+#include "skas.h"
+#include "tlb.h"
static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
- int r, int w, int x, struct host_vm_op *ops, int *index,
- int last_filled, union mm_context *mmu, void **flush,
- int (*do_ops)(union mm_context *, struct host_vm_op *,
+ unsigned int prot, struct host_vm_op *ops, int *index,
+ int last_filled, struct mm_context *mmu, void **flush,
+ int (*do_ops)(struct mm_context *, struct host_vm_op *,
int, int, void **))
{
__u64 offset;
int fd, ret = 0;
fd = phys_mapping(phys, &offset);
- if(*index != -1){
+ if (*index != -1) {
last = &ops[*index];
- if((last->type == MMAP) &&
+ if ((last->type == MMAP) &&
(last->u.mmap.addr + last->u.mmap.len == virt) &&
- (last->u.mmap.r == r) && (last->u.mmap.w == w) &&
- (last->u.mmap.x == x) && (last->u.mmap.fd == fd) &&
- (last->u.mmap.offset + last->u.mmap.len == offset)){
+ (last->u.mmap.prot == prot) && (last->u.mmap.fd == fd) &&
+ (last->u.mmap.offset + last->u.mmap.len == offset)) {
last->u.mmap.len += len;
return 0;
}
}
- if(*index == last_filled){
+ if (*index == last_filled) {
ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
*index = -1;
}
.u = { .mmap = {
.addr = virt,
.len = len,
- .r = r,
- .w = w,
- .x = x,
+ .prot = prot,
.fd = fd,
.offset = offset }
} });
static int add_munmap(unsigned long addr, unsigned long len,
struct host_vm_op *ops, int *index, int last_filled,
- union mm_context *mmu, void **flush,
- int (*do_ops)(union mm_context *, struct host_vm_op *,
+ struct mm_context *mmu, void **flush,
+ int (*do_ops)(struct mm_context *, struct host_vm_op *,
int, int, void **))
{
struct host_vm_op *last;
int ret = 0;
- if(*index != -1){
+ if (*index != -1) {
last = &ops[*index];
- if((last->type == MUNMAP) &&
- (last->u.munmap.addr + last->u.mmap.len == addr)){
+ if ((last->type == MUNMAP) &&
+ (last->u.munmap.addr + last->u.mmap.len == addr)) {
last->u.munmap.len += len;
return 0;
}
}
- if(*index == last_filled){
+ if (*index == last_filled) {
ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
*index = -1;
}
return ret;
}
-static int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
- int x, struct host_vm_op *ops, int *index,
- int last_filled, union mm_context *mmu, void **flush,
- int (*do_ops)(union mm_context *, struct host_vm_op *,
+static int add_mprotect(unsigned long addr, unsigned long len,
+ unsigned int prot, struct host_vm_op *ops, int *index,
+ int last_filled, struct mm_context *mmu, void **flush,
+ int (*do_ops)(struct mm_context *, struct host_vm_op *,
int, int, void **))
{
struct host_vm_op *last;
int ret = 0;
- if(*index != -1){
+ if (*index != -1) {
last = &ops[*index];
- if((last->type == MPROTECT) &&
+ if ((last->type == MPROTECT) &&
(last->u.mprotect.addr + last->u.mprotect.len == addr) &&
- (last->u.mprotect.r == r) && (last->u.mprotect.w == w) &&
- (last->u.mprotect.x == x)){
+ (last->u.mprotect.prot == prot)) {
last->u.mprotect.len += len;
return 0;
}
}
- if(*index == last_filled){
+ if (*index == last_filled) {
ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
*index = -1;
}
.u = { .mprotect = {
.addr = addr,
.len = len,
- .r = r,
- .w = w,
- .x = x } } });
+ .prot = prot } } });
return ret;
}
#define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1))
-void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
- unsigned long end_addr, int force,
- int (*do_ops)(union mm_context *, struct host_vm_op *,
- int, int, void **))
+static inline int update_pte_range(pmd_t *pmd, unsigned long addr,
+ unsigned long end, struct host_vm_op *ops,
+ int last_op, int *op_index, int force,
+ struct mm_context *mmu, void **flush,
+ int (*do_ops)(struct mm_context *,
+ struct host_vm_op *, int, int,
+ void **))
{
- pgd_t *npgd;
- pud_t *npud;
- pmd_t *npmd;
- pte_t *npte;
- union mm_context *mmu = &mm->context;
- unsigned long addr, end;
- int r, w, x;
- struct host_vm_op ops[1];
- void *flush = NULL;
- int op_index = -1, last_op = ARRAY_SIZE(ops) - 1;
- int ret = 0;
+ pte_t *pte;
+ int r, w, x, prot, ret = 0;
+
+ pte = pte_offset_kernel(pmd, addr);
+ do {
+ r = pte_read(*pte);
+ w = pte_write(*pte);
+ x = pte_exec(*pte);
+ if (!pte_young(*pte)) {
+ r = 0;
+ w = 0;
+ } else if (!pte_dirty(*pte)) {
+ w = 0;
+ }
+ prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
+ (x ? UM_PROT_EXEC : 0));
+ if (force || pte_newpage(*pte)) {
+ if (pte_present(*pte))
+ ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
+ PAGE_SIZE, prot, ops, op_index,
+ last_op, mmu, flush, do_ops);
+ else ret = add_munmap(addr, PAGE_SIZE, ops, op_index,
+ last_op, mmu, flush, do_ops);
+ }
+ else if (pte_newprot(*pte))
+ ret = add_mprotect(addr, PAGE_SIZE, prot, ops, op_index,
+ last_op, mmu, flush, do_ops);
+ *pte = pte_mkuptodate(*pte);
+ } while (pte++, addr += PAGE_SIZE, ((addr != end) && !ret));
+ return ret;
+}
- if(mm == NULL)
- return;
+static inline int update_pmd_range(pud_t *pud, unsigned long addr,
+ unsigned long end, struct host_vm_op *ops,
+ int last_op, int *op_index, int force,
+ struct mm_context *mmu, void **flush,
+ int (*do_ops)(struct mm_context *,
+ struct host_vm_op *, int, int,
+ void **))
+{
+ pmd_t *pmd;
+ unsigned long next;
+ int ret = 0;
- ops[0].type = NONE;
- for(addr = start_addr; addr < end_addr && !ret;){
- npgd = pgd_offset(mm, addr);
- if(!pgd_present(*npgd)){
- end = ADD_ROUND(addr, PGDIR_SIZE);
- if(end > end_addr)
- end = end_addr;
- if(force || pgd_newpage(*npgd)){
- ret = add_munmap(addr, end - addr, ops,
- &op_index, last_op, mmu,
- &flush, do_ops);
- pgd_mkuptodate(*npgd);
+ pmd = pmd_offset(pud, addr);
+ do {
+ next = pmd_addr_end(addr, end);
+ if (!pmd_present(*pmd)) {
+ if (force || pmd_newpage(*pmd)) {
+ ret = add_munmap(addr, next - addr, ops,
+ op_index, last_op, mmu,
+ flush, do_ops);
+ pmd_mkuptodate(*pmd);
}
- addr = end;
- continue;
}
+ else ret = update_pte_range(pmd, addr, next, ops, last_op,
+ op_index, force, mmu, flush,
+ do_ops);
+ } while (pmd++, addr = next, ((addr != end) && !ret));
+ return ret;
+}
- npud = pud_offset(npgd, addr);
- if(!pud_present(*npud)){
- end = ADD_ROUND(addr, PUD_SIZE);
- if(end > end_addr)
- end = end_addr;
- if(force || pud_newpage(*npud)){
- ret = add_munmap(addr, end - addr, ops,
- &op_index, last_op, mmu,
- &flush, do_ops);
- pud_mkuptodate(*npud);
+static inline int update_pud_range(pgd_t *pgd, unsigned long addr,
+ unsigned long end, struct host_vm_op *ops,
+ int last_op, int *op_index, int force,
+ struct mm_context *mmu, void **flush,
+ int (*do_ops)(struct mm_context *,
+ struct host_vm_op *, int, int,
+ void **))
+{
+ pud_t *pud;
+ unsigned long next;
+ int ret = 0;
+
+ pud = pud_offset(pgd, addr);
+ do {
+ next = pud_addr_end(addr, end);
+ if (!pud_present(*pud)) {
+ if (force || pud_newpage(*pud)) {
+ ret = add_munmap(addr, next - addr, ops,
+ op_index, last_op, mmu,
+ flush, do_ops);
+ pud_mkuptodate(*pud);
}
- addr = end;
- continue;
}
+ else ret = update_pmd_range(pud, addr, next, ops, last_op,
+ op_index, force, mmu, flush,
+ do_ops);
+ } while (pud++, addr = next, ((addr != end) && !ret));
+ return ret;
+}
- npmd = pmd_offset(npud, addr);
- if(!pmd_present(*npmd)){
- end = ADD_ROUND(addr, PMD_SIZE);
- if(end > end_addr)
- end = end_addr;
- if(force || pmd_newpage(*npmd)){
- ret = add_munmap(addr, end - addr, ops,
+void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
+ unsigned long end_addr, int force,
+ int (*do_ops)(struct mm_context *, struct host_vm_op *,
+ int, int, void **))
+{
+ pgd_t *pgd;
+ struct mm_context *mmu = &mm->context;
+ struct host_vm_op ops[1];
+ unsigned long addr = start_addr, next;
+ int ret = 0, last_op = ARRAY_SIZE(ops) - 1, op_index = -1;
+ void *flush = NULL;
+
+ ops[0].type = NONE;
+ pgd = pgd_offset(mm, addr);
+ do {
+ next = pgd_addr_end(addr, end_addr);
+ if (!pgd_present(*pgd)) {
+ if (force || pgd_newpage(*pgd)) {
+ ret = add_munmap(addr, next - addr, ops,
&op_index, last_op, mmu,
&flush, do_ops);
- pmd_mkuptodate(*npmd);
+ pgd_mkuptodate(*pgd);
}
- addr = end;
- continue;
- }
-
- npte = pte_offset_kernel(npmd, addr);
- r = pte_read(*npte);
- w = pte_write(*npte);
- x = pte_exec(*npte);
- if (!pte_young(*npte)) {
- r = 0;
- w = 0;
- } else if (!pte_dirty(*npte)) {
- w = 0;
}
- if(force || pte_newpage(*npte)){
- if(pte_present(*npte))
- ret = add_mmap(addr,
- pte_val(*npte) & PAGE_MASK,
- PAGE_SIZE, r, w, x, ops,
- &op_index, last_op, mmu,
- &flush, do_ops);
- else ret = add_munmap(addr, PAGE_SIZE, ops,
- &op_index, last_op, mmu,
- &flush, do_ops);
- }
- else if(pte_newprot(*npte))
- ret = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
- &op_index, last_op, mmu,
- &flush, do_ops);
+ else ret = update_pud_range(pgd, addr, next, ops, last_op,
+ &op_index, force, mmu, &flush,
+ do_ops);
+ } while (pgd++, addr = next, ((addr != end_addr) && !ret));
- *npte = pte_mkuptodate(*npte);
- addr += PAGE_SIZE;
- }
- if(!ret)
+ if (!ret)
ret = (*do_ops)(mmu, ops, op_index, 1, &flush);
-/* This is not an else because ret is modified above */
- if(ret) {
- printk("fix_range_common: failed, killing current process\n");
+ /* This is not an else because ret is modified above */
+ if (ret) {
+ printk(KERN_ERR "fix_range_common: failed, killing current "
+ "process\n");
force_sig(SIGKILL, current);
}
}
int updated = 0, err;
mm = &init_mm;
- for(addr = start; addr < end;){
+ for (addr = start; addr < end;) {
pgd = pgd_offset(mm, addr);
- if(!pgd_present(*pgd)){
+ if (!pgd_present(*pgd)) {
last = ADD_ROUND(addr, PGDIR_SIZE);
- if(last > end)
+ if (last > end)
last = end;
- if(pgd_newpage(*pgd)){
+ if (pgd_newpage(*pgd)) {
updated = 1;
err = os_unmap_memory((void *) addr,
last - addr);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
}
}
pud = pud_offset(pgd, addr);
- if(!pud_present(*pud)){
+ if (!pud_present(*pud)) {
last = ADD_ROUND(addr, PUD_SIZE);
- if(last > end)
+ if (last > end)
last = end;
- if(pud_newpage(*pud)){
+ if (pud_newpage(*pud)) {
updated = 1;
err = os_unmap_memory((void *) addr,
last - addr);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
}
}
pmd = pmd_offset(pud, addr);
- if(!pmd_present(*pmd)){
+ if (!pmd_present(*pmd)) {
last = ADD_ROUND(addr, PMD_SIZE);
- if(last > end)
+ if (last > end)
last = end;
- if(pmd_newpage(*pmd)){
+ if (pmd_newpage(*pmd)) {
updated = 1;
err = os_unmap_memory((void *) addr,
last - addr);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
}
}
pte = pte_offset_kernel(pmd, addr);
- if(!pte_present(*pte) || pte_newpage(*pte)){
+ if (!pte_present(*pte) || pte_newpage(*pte)) {
updated = 1;
err = os_unmap_memory((void *) addr,
PAGE_SIZE);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
- if(pte_present(*pte))
+ if (pte_present(*pte))
map_memory(addr,
pte_val(*pte) & PAGE_MASK,
PAGE_SIZE, 1, 1, 1);
}
- else if(pte_newprot(*pte)){
+ else if (pte_newprot(*pte)) {
updated = 1;
os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1);
}
addr += PAGE_SIZE;
}
- return(updated);
+ return updated;
+}
+
+void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
+{
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+ struct mm_struct *mm = vma->vm_mm;
+ void *flush = NULL;
+ int r, w, x, prot, err = 0;
+ struct mm_id *mm_id;
+
+ address &= PAGE_MASK;
+ pgd = pgd_offset(mm, address);
+ if (!pgd_present(*pgd))
+ goto kill;
+
+ pud = pud_offset(pgd, address);
+ if (!pud_present(*pud))
+ goto kill;
+
+ pmd = pmd_offset(pud, address);
+ if (!pmd_present(*pmd))
+ goto kill;
+
+ pte = pte_offset_kernel(pmd, address);
+
+ r = pte_read(*pte);
+ w = pte_write(*pte);
+ x = pte_exec(*pte);
+ if (!pte_young(*pte)) {
+ r = 0;
+ w = 0;
+ } else if (!pte_dirty(*pte)) {
+ w = 0;
+ }
+
+ mm_id = &mm->context.id;
+ prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
+ (x ? UM_PROT_EXEC : 0));
+ if (pte_newpage(*pte)) {
+ if (pte_present(*pte)) {
+ unsigned long long offset;
+ int fd;
+
+ fd = phys_mapping(pte_val(*pte) & PAGE_MASK, &offset);
+ err = map(mm_id, address, PAGE_SIZE, prot, fd, offset,
+ 1, &flush);
+ }
+ else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush);
+ }
+ else if (pte_newprot(*pte))
+ err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush);
+
+ if (err)
+ goto kill;
+
+ *pte = pte_mkuptodate(*pte);
+
+ return;
+
+kill:
+ printk(KERN_ERR "Failed to flush page for address 0x%lx\n", address);
+ force_sig(SIGKILL, current);
}
pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
{
- return(pgd_offset(mm, address));
+ return pgd_offset(mm, address);
}
pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address)
{
- return(pud_offset(pgd, address));
+ return pud_offset(pgd, address);
}
pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address)
{
- return(pmd_offset(pud, address));
+ return pmd_offset(pud, address);
}
pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address)
{
- return(pte_offset_kernel(pmd, address));
+ return pte_offset_kernel(pmd, address);
}
pte_t *addr_pte(struct task_struct *task, unsigned long addr)
pud_t *pud = pud_offset(pgd, addr);
pmd_t *pmd = pmd_offset(pud, addr);
- return(pte_offset_map(pmd, addr));
-}
-
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
-{
- address &= PAGE_MASK;
- flush_tlb_range(vma, address, address + PAGE_SIZE);
+ return pte_offset_map(pmd, addr);
}
void flush_tlb_all(void)
void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
- CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt,
- flush_tlb_kernel_range_common, start, end);
+ flush_tlb_kernel_range_common(start, end);
}
void flush_tlb_kernel_vm(void)
{
- CHOOSE_MODE(flush_tlb_kernel_vm_tt(),
- flush_tlb_kernel_range_common(start_vm, end_vm));
+ flush_tlb_kernel_range_common(start_vm, end_vm);
}
void __flush_tlb_one(unsigned long addr)
{
- CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr);
+ flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
+}
+
+static int do_ops(struct mm_context *mmu, struct host_vm_op *ops, int last,
+ int finished, void **flush)
+{
+ struct host_vm_op *op;
+ int i, ret = 0;
+
+ for (i = 0; i <= last && !ret; i++) {
+ op = &ops[i];
+ switch(op->type) {
+ case MMAP:
+ ret = map(&mmu->id, op->u.mmap.addr, op->u.mmap.len,
+ op->u.mmap.prot, op->u.mmap.fd,
+ op->u.mmap.offset, finished, flush);
+ break;
+ case MUNMAP:
+ ret = unmap(&mmu->id, op->u.munmap.addr,
+ op->u.munmap.len, finished, flush);
+ break;
+ case MPROTECT:
+ ret = protect(&mmu->id, op->u.mprotect.addr,
+ op->u.mprotect.len, op->u.mprotect.prot,
+ finished, flush);
+ break;
+ default:
+ printk(KERN_ERR "Unknown op type %d in do_ops\n",
+ op->type);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void fix_range(struct mm_struct *mm, unsigned long start_addr,
+ unsigned long end_addr, int force)
+{
+ if (!proc_mm && (end_addr > CONFIG_STUB_START))
+ end_addr = CONFIG_STUB_START;
+
+ fix_range_common(mm, start_addr, end_addr, force, do_ops);
}
void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
- CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start,
- end);
+ if (vma->vm_mm == NULL)
+ flush_tlb_kernel_range_common(start, end);
+ else fix_range(vma->vm_mm, start, end, 0);
}
void flush_tlb_mm(struct mm_struct *mm)
{
- CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm);
+ unsigned long end;
+
+ /*
+ * Don't bother flushing if this address space is about to be
+ * destroyed.
+ */
+ if (atomic_read(&mm->mm_users) == 0)
+ return;
+
+ end = proc_mm ? task_size : CONFIG_STUB_START;
+ fix_range(mm, 0, end, 0);
}
void force_flush_all(void)
{
- CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas());
-}
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma = mm->mmap;
+ while (vma != NULL) {
+ fix_range(mm, vma->vm_start, vma->vm_end, 1);
+ vma = vma->vm_next;
+ }
+}
Code Review / linux-2.6.git / blobdiff