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add_process_memory_range(): optionally return range object

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This commit is contained in:
Balazs Gerofi
2016-12-30 15:51:17 +09:00
parent 1794232989
commit ec75095073
5 changed files with 51 additions and 59 deletions
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6
arch/x86/kernel/syscall.c
View File

@ -1741,7 +1741,8 @@ int arch_map_vdso(struct process_vm *vm)
vrflags = VR_REMOTE;
vrflags |= VR_PROT_READ | VR_PROT_EXEC;
vrflags |= VRFLAG_PROT_TO_MAXPROT(vrflags);
error = add_process_memory_range(vm, (intptr_t)s, (intptr_t)e, NOPHYS, vrflags, NULL, 0, PAGE_SHIFT);
error = add_process_memory_range(vm, (intptr_t)s, (intptr_t)e,
NOPHYS, vrflags, NULL, 0, PAGE_SHIFT, NULL);
if (error) {
ekprintf("ERROR: adding memory range for vdso. %d\n", error);
goto out;
@ -1772,7 +1773,8 @@ int arch_map_vdso(struct process_vm *vm)
vrflags = VR_REMOTE;
vrflags |= VR_PROT_READ;
vrflags |= VRFLAG_PROT_TO_MAXPROT(vrflags);
error = add_process_memory_range(vm, (intptr_t)s, (intptr_t)e, NOPHYS, vrflags, NULL, 0, PAGE_SHIFT);
error = add_process_memory_range(vm, (intptr_t)s, (intptr_t)e,
NOPHYS, vrflags, NULL, 0, PAGE_SHIFT, NULL);
if (error) {
ekprintf("ERROR: adding memory range for vvar. %d\n", error);
goto out;

4
kernel/host.c
View File

@ -125,7 +125,7 @@ int prepare_process_ranges_args_envs(struct thread *thread,
up = virt_to_phys(up_v);
if (add_process_memory_range(vm, s, e, up, flags, NULL, 0,
PAGE_SHIFT) != 0) {
PAGE_SHIFT, NULL) != 0) {
ihk_mc_free_pages(up_v, range_npages);
kprintf("ERROR: adding memory range for ELF section %i\n", i);
goto err;
@ -213,7 +213,7 @@ int prepare_process_ranges_args_envs(struct thread *thread,
args_envs_p = virt_to_phys(args_envs);
if(add_process_memory_range(vm, addr, e, args_envs_p,
flags, NULL, 0, PAGE_SHIFT) != 0){
flags, NULL, 0, PAGE_SHIFT, NULL) != 0){
ihk_mc_free_pages(args_envs, ARGENV_PAGE_COUNT);
kprintf("ERROR: adding memory range for args/envs\n");
goto err;

7
kernel/include/process.h
View File

@ -716,9 +716,10 @@ void free_process_memory_ranges(struct process_vm *vm);
int populate_process_memory(struct process_vm *vm, void *start, size_t len);
int add_process_memory_range(struct process_vm *vm,
unsigned long start, unsigned long end,
unsigned long phys, unsigned long flag,
struct memobj *memobj, off_t objoff, int pgshift);
unsigned long start, unsigned long end,
unsigned long phys, unsigned long flag,
struct memobj *memobj, off_t offset,
int pgshift, struct vm_range **rp);
int remove_process_memory_range(struct process_vm *vm, unsigned long start,
unsigned long end, int *ro_freedp);
int split_process_memory_range(struct process_vm *vm,

87
kernel/process.c
View File

@ -1018,21 +1018,18 @@ enum ihk_mc_pt_attribute common_vrflag_to_ptattr(unsigned long flag, uint64_t fa
}
int add_process_memory_range(struct process_vm *vm,
unsigned long start, unsigned long end,
unsigned long phys, unsigned long flag,
struct memobj *memobj, off_t offset,
int pgshift)
unsigned long start, unsigned long end,
unsigned long phys, unsigned long flag,
struct memobj *memobj, off_t offset,
int pgshift, struct vm_range **rp)
{
struct vm_range *range;
int rc;
#if 0
extern void __host_update_process_range(struct thread *process,
struct vm_range *range);
#endif
if ((start < vm->region.user_start)
|| (vm->region.user_end < end)) {
kprintf("range(%#lx - %#lx) is not in user avail(%#lx - %#lx)\n",
kprintf("%s: error: range %lx - %lx is not in user available area\n",
__FUNCTION__,
start, end, vm->region.user_start,
vm->region.user_end);
return -EINVAL;
@ -1040,9 +1037,10 @@ int add_process_memory_range(struct process_vm *vm,
range = kmalloc(sizeof(struct vm_range), IHK_MC_AP_NOWAIT);
if (!range) {
kprintf("ERROR: allocating pages for range\n");
kprintf("%s: ERROR: allocating pages for range\n", __FUNCTION__);
return -ENOMEM;
}
INIT_LIST_HEAD(&range->list);
range->start = start;
range->end = end;
@ -1051,48 +1049,34 @@ int add_process_memory_range(struct process_vm *vm,
range->objoff = offset;
range->pgshift = pgshift;
if(range->flag & VR_DEMAND_PAGING) {
dkprintf("range: 0x%lX - 0x%lX => physicall memory area is allocated on demand (%ld) [%lx]\n",
range->start, range->end, range->end - range->start,
range->flag);
} else {
dkprintf("range: 0x%lX - 0x%lX (%ld) [%lx]\n",
range->start, range->end, range->end - range->start,
range->flag);
}
rc = 0;
if (0) {
/* dummy */
}
else if (phys == NOPHYS) {
/* nothing to map */
}
else if (flag & VR_REMOTE) {
rc = 0;
if (phys == NOPHYS) {
/* Nothing to map */
}
else if (flag & VR_REMOTE) {
rc = update_process_page_table(vm, range, phys, IHK_PTA_REMOTE);
} else if (flag & VR_IO_NOCACHE) {
}
else if (flag & VR_IO_NOCACHE) {
rc = update_process_page_table(vm, range, phys, PTATTR_UNCACHABLE);
} else if(flag & VR_DEMAND_PAGING){
//demand paging no need to update process table now
dkprintf("demand paging do not update process page table\n");
rc = 0;
} else if ((range->flag & VR_PROT_MASK) == VR_PROT_NONE) {
}
else if (flag & VR_DEMAND_PAGING) {
dkprintf("%s: range: 0x%lx - 0x%lx is demand paging\n",
__FUNCTION__, range->start, range->end);
rc = 0;
} else {
}
else if ((range->flag & VR_PROT_MASK) == VR_PROT_NONE) {
rc = 0;
}
else {
rc = update_process_page_table(vm, range, phys, 0);
}
if(rc != 0){
kprintf("ERROR: preparing page tables\n");
if (rc != 0) {
kprintf("%s: ERROR: preparing page tables\n", __FUNCTION__);
kfree(range);
return rc;
}
#if 0 // disable __host_update_process_range() in add_process_memory_range(), because it has no effect on the actual mapping on the MICs side.
if (!(flag & VR_REMOTE)) {
__host_update_process_range(process, range);
}
#endif
insert_vm_range_list(vm, range);
/* Clear content! */
@ -1101,6 +1085,11 @@ int add_process_memory_range(struct process_vm *vm,
memset((void*)phys_to_virt(phys), 0, end - start);
}
/* Return range object if requested */
if (rp) {
*rp = range;
}
return 0;
}
@ -1870,7 +1859,7 @@ int init_process_stack(struct thread *thread, struct program_load_desc *pn,
vrflag |= VR_MAXPROT_READ | VR_MAXPROT_WRITE | VR_MAXPROT_EXEC;
#define NOPHYS ((uintptr_t)-1)
if ((rc = add_process_memory_range(thread->vm, start, end, NOPHYS,
vrflag, NULL, 0, PAGE_SHIFT)) != 0) {
vrflag, NULL, 0, PAGE_SHIFT, NULL)) != 0) {
return rc;
}
@ -1989,7 +1978,7 @@ unsigned long extend_process_region(struct process_vm *vm,
}
if((rc = add_process_memory_range(vm, old_aligned_end,
aligned_end, virt_to_phys(p), flag,
LARGE_PAGE_SHIFT)) != 0){
LARGE_PAGE_SHIFT, NULL)) != 0){
ihk_mc_free_pages(p, (aligned_end - old_aligned_end) >> PAGE_SHIFT);
return end;
}
@ -2019,7 +2008,7 @@ unsigned long extend_process_region(struct process_vm *vm,
if((rc = add_process_memory_range(vm, aligned_end,
aligned_new_end, virt_to_phys((void *)p_aligned),
flag, LARGE_PAGE_SHIFT)) != 0){
flag, LARGE_PAGE_SHIFT, NULL)) != 0){
ihk_mc_free_pages(p, (aligned_new_end - aligned_end + LARGE_PAGE_SIZE) >> PAGE_SHIFT);
return end;
}
@ -2044,9 +2033,9 @@ unsigned long extend_process_region(struct process_vm *vm,
return end;
}
}
if((rc = add_process_memory_range(vm, aligned_end, aligned_new_end,
(p==0?0:virt_to_phys(p)), flag, NULL, 0,
PAGE_SHIFT)) != 0){
if ((rc = add_process_memory_range(vm, aligned_end, aligned_new_end,
(p == 0 ? 0 : virt_to_phys(p)), flag, NULL, 0,
PAGE_SHIFT, NULL)) != 0) {
ihk_mc_free_pages(p, (aligned_new_end - aligned_end) >> PAGE_SHIFT);
return end;
}

6
kernel/syscall.c
View File

@ -1355,7 +1355,7 @@ do_mmap(const intptr_t addr0, const size_t len0, const int prot,
vrflags |= VRFLAG_PROT_TO_MAXPROT(PROT_TO_VR_FLAG(maxprot));
error = add_process_memory_range(thread->vm, addr, addr+len, phys,
vrflags, memobj, off, pgshift);
vrflags, memobj, off, pgshift, NULL);
if (error) {
kprintf("%s: add_process_memory_range failed for 0x%lx:%lu"
" flags: %lx, vrflags: %lx, pgshift: %d, error: %d\n",
@ -4343,7 +4343,7 @@ SYSCALL_DECLARE(shmat)
memobj_ref(&obj->memobj);
error = add_process_memory_range(vm, addr, addr+len, -1,
vrflags, &obj->memobj, 0, obj->pgshift);
vrflags, &obj->memobj, 0, obj->pgshift, NULL);
if (error) {
if (!(prot & PROT_WRITE)) {
(void)set_host_vma(addr, len, PROT_READ|PROT_WRITE);
@ -7103,7 +7103,7 @@ SYSCALL_DECLARE(mremap)
error = add_process_memory_range(thread->vm, newstart, newend, -1,
range->flag, range->memobj,
range->objoff + (oldstart - range->start),
range->pgshift);
range->pgshift, NULL);
if (error) {
ekprintf("sys_mremap(%#lx,%#lx,%#lx,%#x,%#lx):"
"add failed. %d\n",