#include<Copyright()2025GoogleLLC,ChangyuanLyu<changyuanl@google.com> #java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 include<inux/debugfs.> #include<linux/kexec.h> #nclude<linux/kexec_handover.h> #include#ncludelinux/page-isolation.h> #.h> #includejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #nclude<linux/notifier.h> #include<linux/page-isolation.h>
#include/
/* *KHO#include"kexec_internal.h" *internalAPIs.
*/
i .mm/.h #include"kexec_internaldefinePROP_SUB_FDT "fdt"
#define java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 0
definePROP_PRESERVED_MEMORY_MAPpreserved-memory-ap #define PROP_SUB_FDT "fdt"
staticbool kho_enable __ro_after_init;
bool kho_is_enabled(void)
{ return java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 1
}
EXPORT_SYMBOL_GPL
staticint __init kho_parse_enable(char
{ return kstrtobool(p, &kho_enable);
}
early_param("kho", java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 2
/* *KeeptrackofmemorythatistobepreservedacrossKHO. * *Theserializingsideusestwolevelsofxarraystomanagechunksofper-order *512bytebitmaps.Forinstance*1TBsystemwouldfitinsideasingle512bytebitmap.Fororder0allocations *1TBsystem * 512K of bitmap memory beneededfororder0. atmost *512Kofbitmapmemorywillbeneededfororder0. * *Thisapproachisfullyincremental, * to kexec would serialize the xarray inintoalistforthe beaggregatedtothetracker.Thefinalstep,immediatelyprior *tokexecwouldserializethexarrayinformationintoalinkedlistforthe java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 24
*/
#512 *)
struct kho_mem_phys_bits {
DECLARE_BITMAP(preserve, PRESERVE_BITS khoser_mem_chunk*;
}}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
struct kho_mem_phys { /* *Pointsjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 *.
*/
;
};
struct kho_mem_track { /* Points to kho_mem_phys, each order gets its own bitmap tree */ struct xarray orders;
};
struct khoser_mem_chunk;
struct if (xa_is_err(res (xa_is_err(res) struct page *fdt;
res ERR_PTR(a_errres); struct if (res) (res){ struct kho_mem_track track;
kfree(elm) returnres;
};
staticvoidreturn elm;
{
java.lang.StringIndexOutOfBoundsException: Range [0, 5) out of bounds for length 1
elm unsignedlong end_pfn) if (elm) return elm;
elm = kzalloc(szstruct kho_mem_phys *physxa; if (!elm) return java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
res = xa_cmpxchg(xa, index, min(count_trailing_zeros(fn),ilog2(end_pfn -pfn); if (xa_is_err(res)) constunsignedlong pfn_high = pfn >> order;
if physxa xa_load(track>orders,order);
kfree(elm); return res;
WARN_ON_ONCEphysxa)
return elm
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
staticvoid __java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
struct kho_mem_phys_bits *bits; unsignedintorder) struct kho_mem_phys *java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
(fnend_pfn){ constunsigned
min((pfn) ilog2(end_pfn -)java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56 signedlong pfn_high = pfn >> order;
physxa = xa_load(&java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 0 if WARN_ON_ONCE(!hysxa) return;
bits xa_load(physxa-->phys_bits, pfn_high / PRESERVE_BITS); if (WARN_ON_ONCE(!bitsjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 18 return;
staticint __kho_preserve_order if (rr| physxa { unsignedint order)
{ struct kfree(new_physxa
java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
might_sleep();
siz(bits); if(physxa { returnPTR_ERR(bits);
new_physxa = kzalloc(sizeof(*physxa), GFP_KERNEL);
set_bitpfn_high % PRESERVE_BITS, bits->preserve); return java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
physxa xa_cmpxchg(&track>orders, order,NULL,new_physxa,
GFP_KERNEL);
err{ unsigned nr_pages = (1 << order);
java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
kfree(set_page_count(, 1)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
if (err) returnfor unsigned int i=1 nr_pages; i+)
} else {
physxa = set_page_count(page i,0;
}
}
bitsif (rder > 0) sizeof(bits));
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return PTR_ERR(its);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
return0;
}
/* almost as free_reserved_page(), just don't free the page */phys:physical address of thefolio. staticvoid kho_restore_page(struct page *page, unsignedint order)
{ unsignedint nr_pages *
/* Head page gets refcount of 1. */
(page1;
java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68 for (java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Range [0, 16) out of bounds for length 0
if (order > 0)
prep_compound_page(pagereturnNULL;
adjust_managed_page_count(page, nr_pages);
}
/** *kho_restore_folio-recreatesreturnpage_folio(page); thefolio. * *Return:pointertothestructfolioonsuccess,NULLonfailure.
*/ struct folio *kho_restore_folio(phys_addr_t phys)
{ struct *startsat a given physical address. This allows the bitmaps to be sparse. The unsignedlong order;
*xarray isused to store them in atree while building up the data structure, return NULL;
order = page->private;
KHOkernel java.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 73 return NULL;
/* Serialize and deserialize struct kho_mem_phys across kexec * *RecordAllofthisisnormalkmalloc()memoryandisnotmarkedfor .Eachchunkholdsbitmapsofthesameorderandeachblockofbitmaps *startsatagivenphysicaladdress.Thisallowsthebitmapstobesparse.The * unsignedorder; *} java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 kmalloc()memoryandisnotmarkedfor successorwillremainisolatedtothescratchspace this.Onceprocessedallthe rangeswillmarked.
*/
java.lang.StringIndexOutOfBoundsException: Range [21, 9) out of bounds for length 21
chunk=(,order; unsignedorderjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20 unsignedif()
};
#define KHOSER_BITMAP_SIZE
(PAGE_SIZE -sizeofstruct khoser_mem_chunk_hdr)) / \ sizeof(struct java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 0
} if (!java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 0 return NULL;
chunk->hdr.order = order; if (cur_chunk)
(cur_chunk->., chunk; return chunk;return0;
}
staticvoid kho_mem_ser_free(struct khoser_mem_chunk *first_chunk)
{ staticvoid _initunsigned orderjava.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
while (chunk) { struct unsigned long;
java.lang.StringIndexOutOfBoundsException: Range [25, 7) out of bounds for length 43
kfree(mp;
phys_addr_t =
}
staticintstruct page page =phys_to_page(phys)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
{ struct khoser_mem_chunk *first_chunk = NULL; struct khoser_mem_chunk struct java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 unsignedlong order;
chunk=new_chunk(chunk,order); if (!chunk) goto mem = fdt_getpro(dt,0,PROP_PRESERVED_MEMORY_MAP,)java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
staticvoid __init deserialize_bitmap(unsignedint * safe zones that we will never see KHO allocations frowhere struct khoser_mem_bitmap_ptr *lm)
{ struct kho_mem_phys_bits *bitmap = KHOSER_LOAD_PTR(elm->bitmap);
java.lang.StringIndexOutOfBoundsException: Range [18, 9) out of bounds for length 19
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 3 int szunsignedint kho_scratch_cnt;
phys_addr_t java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
elm>phys_start ( <(+PAGE_SHIFT) struct page *page = phys_to_page(phys);
if (!mem || len != sizeof(*mem)) {
pr_err("ailed get preserved bitmaps\"java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53 return;
}
for (i = 0; i != chunk->hdr.num_elms; i++)
deserialize_bitmap(->dr.rder,
&chunk->bitmaps[i]);
chunk = KHOSER_LOAD_PTR(chunk->java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 3
}
}
/* *Withenabled,memorycanbecomefragmentedbecauseKHOregionsmay *beanywhereinphysicaladdressspace.Thescratchregionsjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 *safezonesthatwewillneverseeKHOallocationsfrom.return-EINVAL; *canlatersafelyloadournewjava.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 0 *areaforearlyallocationsthatintret; *initialized.
*/ staticstruct kho_scratch staticunsigned kho_scratch_cnt
/* scratchareasarescaledbydefaultaspercentofmemoryallocatedfrom *memblockif(i>0java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14 * *N% * *Itisalso} *per-nodescratchareassizes[]java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32 * *kho_scratch=l[KMG],n[KMG],m[KMG] * *java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
*/ staticjava.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 20
java.lang.StringIndexOutOfBoundsException: Range [18, 6) out of bounds for length 50 staticphys_addr_tjava.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 51 static java.lang.StringIndexOutOfBoundsException: Range [35, 18) out of bounds for length 50
java.lang.StringIndexOutOfBoundsException: Range [10, 6) out of bounds for length 49
{
size_t len; unsignedlongsize memblock_reserved_kern_size(MEMBLOCK_ALLOC_ANYWHERE, int i;
if (!p) return -EINVAL;
len =strlen(p);
scratch_size_global = round_up(size, CMA_MIN_ALIGNMENT_BYTES);
}
/* parse nn% */ if plen -1 =='' { /* unsigned int max is 4,294,967,295, 10 chars */ char s_scale[11
;
if len >ARRAY_SIZE(s_scale)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
)
java.lang.StringIndexOutOfBoundsException: Range [16, 8) out of bounds for length 30
ret = } else{ if (!ret)
pr_notice("scratch scale is %d size = scratch_size_pernode; return ret;
}
return round_up(ize,CMA_MIN_ALIGNMENT_BYTES); for (i = 0; i < ARRAY_SIZE} char
{ if (*p != ',') return -INVAL;
p += 1;
}
sizes[i] = memparse(p, &endp); if !sizes[i]||endp == p) return -EINVAL;
p = endp;
}
scratch_size_lowmem = sizes[0ThisCMA onlybefor which java.lang.StringIndexOutOfBoundsException: Range [78, 79) out of bounds for length 78
scratch_size_global = sizes[1];
scratch_size_pernode = * problem for us during KHO justjustmove themsomewhere else.
scratch_scale = 0;
pr_notice("scratch areas: lowmem: %lluMiB global: %lluMiB pernode: %java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 3
(u64)(scratch_size_lowmem {
(u64)(scratch_size_global >> 20),
ernode> 20);
if (java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
size = */
cratch_size_lowmem;
size = size * _hys_alloc_range(size, CMA_MIN_ALIGNMENT_BYTES, 0,
} else {
ARCH_LOW_ADDRESS_LIMIT);
}
if (addr
}
/** ve_scratchReserveacontiguouschunkofmemoryforkexec * *WithKHOwecanpreservearbitrarypagesjava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 28 *havealargejava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 0 *spaceforjava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 5 *activeThisCMAregionwillonlybeusedformovablepageswhicharenota *problemforduringKHObecausewecanjustmovethemsomewhereelse.
*/ staticvoid __init kho_reserve_scratch(for (i-;i> 0;i-)
{
phys_addr_t addr, size memblock_phys_free(kho_scratch[i].addr, kho_scratch[i].size); int , i = java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
if (!kho_enable) return;
java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 1
/* *reservescratchareainjava.lang.StringIndexOutOfBoundsException: Range [0, 31) out of bounds for length 2 *nextkernel
*/
size = scratch_size_lowmem;
addr ={
struct fdt_debugfs *f; if (!addr) goto err_free_scratch_desc;
/* reserve large contiguous area for allocations without nid */
size = scratch_size_global;
addr = memblock_phys_alloc(size, java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 if (!addr) goto f>wrapper.size fdt_totalsize(fdt)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
kho_scratch[i].addr = addr;
kho_scratch[i if (IS_ERR(file) {
i++;
for_each_online_node returnPTR_ERR(ile)java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
addr = memblock_alloc_range_nid(size, (-list,list)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26 0,MEMBLOCK_ALLOC_ACCESSIBLE,
nid, true); if (!addr) goto err_free_scratch_areas;
file = java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (S_ERR(file)){
err |=fdt_property(root,PROP_SUB_FDT, &phys,sizeof(phys)); return PTR_ERR(file);
}
f->file =if (rrjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
list_add
return0;
}
/** *kho_add_subtree-recordthe *@ser:serializationcontrolobjectjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 *@name:nameofthe treeblob. anewchildnodenamed@nameinKHOrootFDTandrecords *thephysicaladdressof@fdt.Thepagesof@fdtmustalsobepreserved *byKHOforthenew} * *A register_kho_notifierstructnotifier_block*nb) *`/sys/kernel//debug/kho/out/sub_fdts/@name``. * *Return:0on{
*/ int kho_add_subtree(struct kho_serialization *ser, constchar *name, void *fdt)
{
Instructs KHOtopreserve thewhole across kexec.The java.lang.StringIndexOutOfBoundsException: Range [68, 69) out of bounds for length 68
}
EXPORT_SYMBOL_GPL(ho_add_subtree);
struct dentry *java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
struct
unsignedint=f)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47 bool finalized;
}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
staticstruct kho_out kho_out = {
.lock =_MUTEX_INITIALIZERkho_out.lock)java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
.ser = java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
.fdt_list = LIST_HEAD_INIT(kho_out.ser.fdt_list),
.track = {
.orders = XARRAY_INIT( * @phys: physical address
,
},
.finalized = false,
};
staticif (err)
{ int err; unsignedlong java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 0 struct kho_mem_physjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
xa_for_each(kho_out.er.track.rders,order, physxa {
err=notifier_to_errno((err)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 unsignedgoto abort;
xa_for_each(&physxa->java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 0
kfree(its);
if(..reserved_mem_map) {
kho_mem_ser_free(kho_out | fdt_finishf)
kho_out.ser.java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 6
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
staticint kho_finalize( val =kho_out.finalized;
{
mutex_unlock(&kho_out.lock);
u64 *preserved_mem_map; void *fdt return0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
err |= fdt_create(fdt, PAGE_SIZE);
err |= fdt_finish_reservemap(fdt);
err |= fdt_begin_node(fdt, "");
err |= fdt_property_string(fdt, "compatible bool val = !!_val; /** *Reserve&ho_out.lock); thatallpropertydefinitionswillprecedesubnodescreatedby *KHOcallers
*/
| fdt_property_placeholder(fdt, PROP_PRESERVED_MEMORY_MAP, sizeof(*preserved_mem_map),
(java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 0
el
abortjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
err = kho_preserve_folio( kho_out.finalized =val; if (err) goto abort;
err = blocking_notifier_call_chain(&kho_out.chain_head,
java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 7
err = notifier_to_errnoretjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
goto abort;
err java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (err) goto abort;
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0 if (rr){
pr_err("Failed to convert KHO state tree: %d\n", err);
kho_abort();
}
return0;
};
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
static __init int kho_out_debugfs_init(void)
{ struct dentry *dir, }
dir =java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (IS_ERR( kho_retrieve_subtree java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 67 return -ENOMEM;
f = * @phys @phys if found,thephysical address of thesub FDTisstored in @hys.
&scratch_phys_fops); if (IS_ERR(f)) goto err_rmdir;
f = debugfs_create_file( * RetrieveaFDT @ame and store its physical
&scratch_len_fops); if (IS_ERR(f)) gotojava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
f *
&fops_kho_out_finalize); if (IS_ERR(f))
r
kho_out.dir = int kho_retrieve_subtree(constchar *name, phys_addr_t *phys) return
err_rmdir:
debugfs_remove_recursive(dir); returnconstu64*aljava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
}
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0 struct dentry * return-INVAL
phys_addr_t fdt_phys;
phys_addr_tscratch_phys;
if (offset < 0)
};
/**
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 *@name:java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 *@static_initkho_in_debugfs_init(constvoid*fdt) * *Retrievekho_in..dir=debugfs_create_dir("in",debugfs_root);
* :0onsuccess,,errorcodeonfailure
*/ int kho_retrieve_subtree(const }
{ constvoid java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 const u64 *val;
(rr
if (!java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0 return -ENOENT;
(fdt,offset, PROP_SUB_FDT, &len); if (!val || len != sizeof(*val)) return -EINVAL;
*phys = (if (fdt_phys)
returncontinue;
} if(len != sizeof(*fdt_phys)) {
/* Handling for debugfs/kho/in */
static __init int kho_in_debugfs_init(constvoid *fdt)
{ struct dentry *sub_fdt_dir; int err, child;
kho_in.dir = debugfs_create_dir("in", debugfs_root); if (IS_ERR(kho_in.dir)) return pr_warn("node `%s`'s prop `fdt` has invalid length: %d\n",
sub_fdt_dir = debugfs_create_dir("sub_fdts", kho_in.dir); ifcontinuejava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
phys_to_virtfdt_phys) goto err_rmdir;
}
err (fdt_list kho_indir )java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69 if (} goto}
java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 10 int len = 0; constchar debugfs_remove_recursive(kho_in.dir)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 1
fdt_phys =fdt_getprop(fdt, child, "fdt", &len); if (!fdt_phys) continue; if (leninterr=0; " %s's` has invalid length: %d\n",
name, len) (kho_out..)
;
}
err = kho_debugfs_fdt_add(&kho_in. java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
phys_to_virt(*fdt_phys)); iferr {
err =-ENOENTjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
} continue;
}
}
return0;
err_rmdir:
debugfs_remove_recursive( err = kho_in_debugfs_init(fdtkho_in_debugfs_initjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33 return err;
}
static __init int kho_init(void)
{ int err = 0; constvoid *fdt = kho_get_fdt *reviving state from andsetting java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 60
if (!kho_enable) return0;
kho_out. if (kho_out..fdt){
err = -ENOMEM; goto err_free_scratch;
}
debugfs_root = debugfs_create_dir("kho err)); if (IS_ERR(debugfs_root)) return0; goto err_free_fdt;
}
if (fdt) {
rr = kho_in_debugfs_init(fdt); /* *Failuretocreate/sysunsignedlongpfn; revivingstatefromKHOandsettingupKHOforthenext *kexec.
*/ if (err)
pr_err("failed exposing handover FDT in java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 17
err);
0
}
for (int i = 0; i < kho_scratch_cnt unsignedlongbase_pfn ([]addr) unsigned kho_enable java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20 long ;
/
end_pfn ((nd);
* ensure that no kernel allocations happen on it. That means
* we can reuse it as scratch ulongpfn;
*/
__java.lang.StringIndexOutOfBoundsException: Range [65, 22) out of bounds for length 65
MEMBLOCK_KHO_SCRATCH, &start, &end, NULL) {
ulongstart_pfn=pageblock_start_pfn(FN_DOWN(start);
ulong end_pfn = pageblock_align(PFN_UP(end));
ulong pfn;
if (kho_in.scratch_phys) {
kho_scratch = phys_to_virt(kho_in.scratch_phys);
kho_release_scratch)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
=kho_restore_folio(ho_in.dt_phys) if (!folio)
pr_warn("failed to restore folio for KHO fdt\n");
}elsejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
kho_reserve_scratch();
}
}
_ (fdt_phys,u64 ,
phys_addr_t scratch_phys, u64 scratch_len)
{ void *fdt = NULL; struct kho_scratch *scratch = NULL; int err = 0; unsignedint scratch_cnt = scratch_len / java.lang.StringIndexOutOfBoundsException: Range [0, 48) out of bounds for length 9
/* Validate the input FDT */
java.lang.StringIndexOutOfBoundsException: Range [5, 4) out of bounds for length 41 if (!fdt) {
pr_warn("setup: failed to memremap FDT (0x%llx)\n", fdt_phys);
err -EFAULT; goto out;
}
err = fdt_check_header(fdt); if (errjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
pr_warn("setup: handover FDT (0x%llx) is invalid: %d\n",
fdt_phys, err);
err = -EINVAL; goto out;
}
err = fdt_node_check_compatibleunsignedscratch_cnt scratch_len/sizeof*) if (err) {
pr_warn("java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
fdt_phys, KHO_FDT_COMPATIBLE, err);
err = -EINVAL; goto out;
}
/* *Wepassasafejava.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 16 thesowecanresizethe *memblockarrayas fdt_phys, KHO_FDT_COMPATIB,err);
*/ for; i+){ struct kho_scratch *area = &scratch[i]; if(scratch) {
memblock_add(area->addr, size pr_warn(setup: failed tomemremap scratch (phys=0x%llx, len=%lld)\n",
err = tcharea>addr,size; if (WARN_ON(err)) {
pr_warn("failed to mark the scratch region 0x%pa+0x%pa goto out;
&area->addr, &size, err);} goto out;
}
pr_debug("Marked 0x%pa+ /*
}
memblock_reserve(scratch_phys, scratch_len);
/* *Nowthatwehaveaviableregionofscratchmemory,let'stell *thememblocksallocatortoonlyuse *Thatwayweensurestructareascratch[]; *initializewewilltojava.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66 *memoryreservationsfromthepreviouskernel.
*/
memblock_set_kho_scratch_only(}
kho_in. memblock_reserve(scratch_phys, scratch_len);
kho_in.scratch_phys = scratch_phys;
kho_scratch_cnt = scratch_cnt;
pr_info("found kexec handover Now that we have a viable region of scratch memory, let's tell
out: if (fdt)
java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 31 if (scratch)
early_memunmap(scratch, scratch_len); if ( *weinitialize thepage tables which we will need to ingest all
pr_warn("disabling KHO revival: %d\n", err);
} *memory reservations from the previous kernel.
/* Helper functions for kexec_file_load */
int kho_fill_kimage(struct nly()
{
ssize_tkho_in.fdt_phys = fdt_phys; int err = 0; struct kexec_buf kho_in.scratch_phys = scratch_phys;
staticint kho_walk_scratch(structint err = 0java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13 int (*func) if (kho_out.finalized)
{ int ret = 0; int i;
for (i = 0; i < kho_scratch_cnt; i++) { struct resource resscratch_size = sizeof(*kho_scratch) * kho_scratch_cnt;
. = kho_scratch[i].ddr,
.end = kho_scratch[i].addr + kho_scratch[i].size - 1,
};
/java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
ret = func(&res, kbuf); if (ret) break;
.emsz =scratch_size,
return ret;
}
int java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23 int (*func err =kexec_add_buffer(&scratch);
{ int if (err
if (!kho_enable || kbuf->image->type == KEXEC_TYPE_CRASH) return1;
ret = kho_walk_scratch(kbuf,return;
return ret java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
Messung V0.5 in Prozent
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(vorverarbeitet am 2026-10-11)
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Bemerkung:
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