Le 07/11/2025 à 15:37, Ritesh Harjani a écrit :

Christophe Leroy [off-list ref] writes:

quoted

Le 06/11/2025 à 16:02, David Hildenbrand (Red Hat) a écrit :

quoted

quoted

quoted

Yes, we discussed that in [1].

We'll have to set ARCH_HAS_GIGANTIC_PAGE on ppc and increase
MAX_FOLIO_ORDER, because apparently, there might be ppc configs that
have even larger hugetlb sizes than PUDs.

@Cristophe, I was under the impression that you would send a fix. Do you
want me to prepare something and send it out?

Indeed I would have liked to better understand the implications of all
this, but I didn't have the time.

Indeed, too me longer than it should to understand and make up my mind
as well.

quoted

By the way, you would describe the fix better than me so yes if you can
prepare and send a fix please do.

I just crafted the following. I yet have to test it more, some early
feedback+testing would be appreciated!

  From 274928854644c49c92515f8675c090dba15a0db6 Mon Sep 17 00:00:00 2001
From: "David Hildenbrand (Red Hat)" <david@kernel.org>
Date: Thu, 6 Nov 2025 11:31:45 +0100
Subject: [PATCH] mm: fix MAX_FOLIO_ORDER on some ppc64 configs with hugetlb

In the past, CONFIG_ARCH_HAS_GIGANTIC_PAGE indicated that we support
runtime allocation of gigantic hugetlb folios. In the meantime it evolved
into a generic way for the architecture to state that it supports
gigantic hugetlb folios.

In commit fae7d834c43c ("mm: add __dump_folio()") we started using
CONFIG_ARCH_HAS_GIGANTIC_PAGE to decide MAX_FOLIO_ORDER: whether we could
have folios larger than what the buddy can handle. In the context of
that commit, we started using MAX_FOLIO_ORDER to detect page corruptions
when dumping tail pages of folios. Before that commit, we assumed that
we cannot have folios larger than the highest buddy order, which was
obviously wrong.

In commit 7b4f21f5e038 ("mm/hugetlb: check for unreasonable folio sizes
when registering hstate"), we used MAX_FOLIO_ORDER to detect
inconsistencies, and in fact, we found some now.

Powerpc allows for configs that can allocate gigantic folio during boot
(not at runtime), that do not set CONFIG_ARCH_HAS_GIGANTIC_PAGE and can
exceed PUD_ORDER.

To fix it, let's make powerpc select CONFIG_ARCH_HAS_GIGANTIC_PAGE for
all 64bit configs, and increase the maximum folio size to P4D_ORDER.

Ideally, we'd have a better way to obtain a maximum value. But this should
be good enough for now fix the issue and now mostly states "no real folio
size limit".

While at it, handle gigantic DAX folios more clearly: DAX can only
end up creating gigantic folios with HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD.

Add a new Kconfig option HAVE_GIGANTIC_FOLIOS to make both cases
clearer. In particular, worry about ARCH_HAS_GIGANTIC_PAGE only with
HUGETLB_PAGE.

Note: with enabling CONFIG_ARCH_HAS_GIGANTIC_PAGE on PPC64, we will now
also allow for runtime allocations of folios in some more powerpc configs.
I don't think this is a problem, but if it is we could handle it through
__HAVE_ARCH_GIGANTIC_PAGE_RUNTIME_SUPPORTED.

While __dump_page()/__dump_folio was also problematic (not handling dumping
of tail pages of such gigantic folios correctly), it doesn't relevant
critical enough to mark it as a fix.

Fixes: 7b4f21f5e038 ("mm/hugetlb: check for unreasonable folio sizes
when registering hstate")
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>
---
   arch/powerpc/Kconfig                   | 1 +
   arch/powerpc/platforms/Kconfig.cputype | 1 -
   include/linux/mm.h                     | 4 ++--
   include/linux/pgtable.h                | 1 +
   mm/Kconfig                             | 7 +++++++
   5 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e24f4d88885ae..55c3626c86273 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig

@@ -137,6 +137,7 @@ config PPC
       select ARCH_HAS_DMA_OPS            if PPC64
       select ARCH_HAS_FORTIFY_SOURCE
       select ARCH_HAS_GCOV_PROFILE_ALL
+    select ARCH_HAS_GIGANTIC_PAGE        if PPC64

The patch looks good from PPC64 perspective, it also fixes the problem
reported on corenet64_smp_defconfig...

quoted

Problem is not only on PPC64, it is on PPC32 as well, for instance
corenet32_smp_defconfig has the problem as well.

However on looking deeper into it - I agree with Christophe that this
problem might still exist on PPC32.

I did try the patch on corenet32_smp_defconfig and I can see the WARN_ON
still triggering. You can check the logs here..

https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Friteshharjani%2Flinux-ci%2Factions%2Fruns%2F19169468405%2Fjob%2F54799498288&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C27caddf37d884b359c4008de1e13dd22%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638981267852035218%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=ceCXfRzudcYmZhzcoUYKMUeirOlKLgVdEy1L2vNrSPI%3D&reserved=0

quoted

So I think what you want instead is:

diff --git a/arch/powerpc/platforms/Kconfig.cputype

b/arch/powerpc/platforms/Kconfig.cputype
index 7b527d18aa5ee..1f5a1e587740c 100644

--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype

@@ -276,6 +276,7 @@ config PPC_E500
          select FSL_EMB_PERFMON
          bool
          select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
+       select ARCH_HAS_GIGANTIC_PAGE if ARCH_SUPPORTS_HUGETLBFS
          select PPC_SMP_MUXED_IPI
          select PPC_DOORBELL
          select PPC_KUEP

@Christophe,

I don't think even the above diff will fix the warning on PPC32.
The patch defines MAX_FOLIO_ORDER as P4D_ORDER...

+#define MAX_FOLIO_ORDER        P4D_ORDER
+#define P4D_ORDER              (P4D_SHIFT - PAGE_SHIFT)

and for ppc32 in..
include/asm-generic/pgtable-nop4d.h
     #define P4D_SHIFT		PGDIR_SHIFT

Then in..
arch/powerpc/include/asm/nohash/32/pgtable.h
     #define PGDIR_SHIFT	(PAGE_SHIFT + PTE_INDEX_SIZE)
     #define PTE_INDEX_SIZE	PTE_SHIFT

in...
arch/powerpc/include/asm/page_32.h
     #define PTE_SHIFT	(PAGE_SHIFT - PTE_T_LOG2)	/* full page */

     #define PTE_T_LOG2	(__builtin_ffs(sizeof(pte_t)) - 1)


So if you see from above P4D_ORDER is coming down to PTE_INDEX_SIZE

IIUC, that will cause MAX_FOLIO_ORDER to be 9 in case of e500mc machine type right?

Can you please confirm if the above analysis looks correct to you?

Ah you are right, that's not enough. I was thinking that PGDIR_ORDER was 
the highest possible value ever but in fact not. PGDIR_SIZE is 4Mbytes 
so any page larger than that still triggers the warning. Here are the 
warnings I get on QEMU with corenet32_smp_defconfig

random: crng init done
Hash pointers mode set to never.
Memory CAM mapping: 16/16/16/16/64/64/64/256/256 Mb, residual: 256Mb
Activating Kernel Userspace Access Protection
Activating Kernel Userspace Execution Prevention
Linux version 6.18.0-rc4-00026-g274928854644-dirty 
(chleroy@PO20335.IDSI0.si.c-s.fr) (powerpc64-linux-gcc (GCC) 8.5.0, GNU 
ld (GNU Binutils) 2.36.1) #1706 SMP Fri Nov  7 17:01:26 CET 2025
OF: reserved mem: Reserved memory: No reserved-memory node in the DT
Found initrd at 0xc4000000:0xc41d1a3b
Hardware name: QEMU ppce500 e5500 0x80240020 QEMU e500
printk: legacy bootconsole [udbg0] enabled
CPU maps initialized for 1 thread per core
-----------------------------------------------------
phys_mem_size     = 0x40000000
dcache_bsize      = 0x40
icache_bsize      = 0x40
cpu_features      = 0x0000000000000194
   possible        = 0x000000000001039c
   always          = 0x0000000000000100
cpu_user_features = 0x8c008000 0x08000000
mmu_features      = 0x000a0210
-----------------------------------------------------
qemu_e500_setup_arch()
barrier-nospec: using isync; sync as speculation barrier
Zone ranges:
   Normal   [mem 0x0000000000000000-0x000000002fffffff]
   HighMem  [mem 0x0000000030000000-0x000000003fffffff]
Movable zone start for each node
Early memory node ranges
   node   0: [mem 0x0000000000000000-0x000000003fffffff]
Initmem setup node 0 [mem 0x0000000000000000-0x000000003fffffff]
MMU: Allocated 1088 bytes of context maps for 255 contexts
percpu: Embedded 17 pages/cpu s39436 r8192 d22004 u69632
Kernel command line: hugepagesz=1g hugepages=1 hugepagesz=64m 
hugepages=1 hugepagesz=256m hugepages=1 noreboot no_hash_pointers
Unknown kernel command line parameters "noreboot", will be passed to 
user space.
printk: log buffer data + meta data: 16384 + 51200 = 67584 bytes
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at mm/hugetlb.c:4753 hugetlb_add_hstate+0x170/0x178
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 
6.18.0-rc4-00026-g274928854644-dirty #1706 NONE
Hardware name: QEMU ppce500 e5500 0x80240020 QEMU e500
NIP:  c2027d88 LR: c2028548 CTR: 00000003
REGS: c24b5e10 TRAP: 0700   Not tainted 
(6.18.0-rc4-00026-g274928854644-dirty)
MSR:  00021002 <CE,ME>  CR: 24000424  XER: 20000000

GPR00: c2028548 c24b5f00 c23b5580 00000012 40000000 c24b5ee0 c24c0000 
00000000
GPR08: c24f7934 00001000 c23b74cc 00000000 c24f5070 02089cc0 00000000 
00000000
GPR16: 00000000 00000000 00000000 00000000 c0000000 00000000 ef7e7fc0 
c23b5008
GPR24: 00000000 c10937d4 0000000a c205b000 00000000 c24f7934 40000000 
c24f7934
NIP [c2027d88] hugetlb_add_hstate+0x170/0x178
LR [c2028548] hugepagesz_setup+0xb0/0x16c
Call Trace:
[c24b5f00] [c0d3dc6c] memparse+0x2c/0x104 (unreliable)
[c24b5f30] [c2028548] hugepagesz_setup+0xb0/0x16c
[c24b5f50] [c2028d18] hugetlb_bootmem_alloc+0x7c/0x194
[c24b5f80] [c2021628] mm_core_init+0x30/0x368
[c24b5fa0] [c2000ec0] start_kernel+0x2f4/0x7bc
[c24b5ff0] [c0000478] set_ivor+0x150/0x18c
Code: 60000000 60000000 2f8a0000 41deff28 83810020 83a10024 83c10028 
83e1002c 38210030 4e800020 0fe00000 0fe00000 <0fe00000> 4bffff24 
3d20c24d 9421ff60
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at mm/hugetlb.c:4753 hugetlb_add_hstate+0x170/0x178
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper Tainted: G        W 
6.18.0-rc4-00026-g274928854644-dirty #1706 NONE
Tainted: [W]=WARN
Hardware name: QEMU ppce500 e5500 0x80240020 QEMU e500
NIP:  c2027d88 LR: c2028548 CTR: 00000005
REGS: c24b5e10 TRAP: 0700   Tainted: G        W 
(6.18.0-rc4-00026-g274928854644-dirty)
MSR:  00021002 <CE,ME>  CR: 24000224  XER: 20000000

GPR00: c2028548 c24b5f00 c23b5580 0000000e 04000000 c24b5ee0 c24c0000 
00000001
GPR08: 00001000 40000000 c24f79b4 00000000 24000424 02089cc0 00000000 
00000000
GPR16: 00000000 00000000 00000000 00000000 c0000000 00000000 ef7e7fc0 
c23b5008
GPR24: 00000000 c10937d4 0000000a c205b000 00000080 c24f7934 04000000 
c24f79b4
NIP [c2027d88] hugetlb_add_hstate+0x170/0x178
LR [c2028548] hugepagesz_setup+0xb0/0x16c
Call Trace:
[c24b5f00] [c0d3dc6c] memparse+0x2c/0x104 (unreliable)
[c24b5f30] [c2028548] hugepagesz_setup+0xb0/0x16c
[c24b5f50] [c2028d18] hugetlb_bootmem_alloc+0x7c/0x194
[c24b5f80] [c2021628] mm_core_init+0x30/0x368
[c24b5fa0] [c2000ec0] start_kernel+0x2f4/0x7bc
[c24b5ff0] [c0000478] set_ivor+0x150/0x18c
Code: 60000000 60000000 2f8a0000 41deff28 83810020 83a10024 83c10028 
83e1002c 38210030 4e800020 0fe00000 0fe00000 <0fe00000> 4bffff24 
3d20c24d 9421ff60
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at mm/hugetlb.c:4753 hugetlb_add_hstate+0x170/0x178
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper Tainted: G        W 
6.18.0-rc4-00026-g274928854644-dirty #1706 NONE
Tainted: [W]=WARN
Hardware name: QEMU ppce500 e5500 0x80240020 QEMU e500
NIP:  c2027d88 LR: c2028548 CTR: 00000004
REGS: c24b5e10 TRAP: 0700   Tainted: G        W 
(6.18.0-rc4-00026-g274928854644-dirty)
MSR:  00021002 <CE,ME>  CR: 24000224  XER: 20000000

GPR00: c2028548 c24b5f00 c23b5580 00000010 10000000 c24b5ee0 c24c0000 
00000002
GPR08: 00001000 04000000 c24f7a34 00000000 24000224 02089cc0 00000000 
00000000
GPR16: 00000000 00000000 00000000 00000000 c0000000 00000000 ef7e7fc0 
c23b5008
GPR24: 00000000 c10937d4 0000000a c205b000 00000100 c24f7934 10000000 
c24f7a34
NIP [c2027d88] hugetlb_add_hstate+0x170/0x178
LR [c2028548] hugepagesz_setup+0xb0/0x16c
Call Trace:
[c24b5f00] [c0d3dc6c] memparse+0x2c/0x104 (unreliable)
[c24b5f30] [c2028548] hugepagesz_setup+0xb0/0x16c
[c24b5f50] [c2028d18] hugetlb_bootmem_alloc+0x7c/0x194
[c24b5f80] [c2021628] mm_core_init+0x30/0x368
[c24b5fa0] [c2000ec0] start_kernel+0x2f4/0x7bc
[c24b5ff0] [c0000478] set_ivor+0x150/0x18c
Code: 60000000 60000000 2f8a0000 41deff28 83810020 83a10024 83c10028 
83e1002c 38210030 4e800020 0fe00000 0fe00000 <0fe00000> 4bffff24 
3d20c24d 9421ff60
---[ end trace 0000000000000000 ]---
HugeTLB: allocating 1 of page size 1.00 GiB failed.  Only allocated 0 
hugepages.
Built 1 zonelists, mobility grouping on.  Total pages: 262144
mem auto-init: stack:off, heap alloc:off, heap free:off
**********************************************************
**   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
**                                                      **
** This system shows unhashed kernel memory addresses   **
** via the console, logs, and other interfaces. This    **
** might reduce the security of your system.            **
**                                                      **
** If you see this message and you are not debugging    **
** the kernel, report this immediately to your system   **
** administrator!                                       **
**                                                      **
** Use hash_pointers=always to force this mode off      **
**                                                      **
**   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
**********************************************************
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
rcu: Hierarchical RCU implementation.
rcu: 	RCU event tracing is enabled.
rcu: 	RCU restricting CPUs from NR_CPUS=24 to nr_cpu_ids=2.
	Tracing variant of Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
RCU Tasks Trace: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 
rcu_task_cpu_ids=2.
NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
mpic: Setting up MPIC " OpenPIC  " version 1.2 at fe0040000, max 2 CPUs
mpic: ISU size: 256, shift: 8, mask: ff
mpic: Initializing for 256 sources
rcu: srcu_init: Setting srcu_struct sizes based on contention.
clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 
0x5c4093a7d1, max_idle_ns: 440795210635 ns
clocksource: timebase mult[2800000] shift[24] registered
Console: colour dummy device 80x25
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
e500 family performance monitor hardware support registered
rcu: Hierarchical SRCU implementation.
rcu: 	Max phase no-delay instances is 1000.
Timer migration: 1 hierarchy levels; 8 children per group; 1 crossnode level
smp: Bringing up secondary CPUs ...
Activating Kernel Userspace Access Protection
smp: Brought up 1 node, 2 CPUs
Memory: 668416K/1048576K available (13796K kernel code, 1160K rwdata, 
18972K rodata, 3796K init, 245K bss, 377736K reserved, 0K cma-reserved, 
262144K highmem)
devtmpfs: initialized
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, 
max_idle_ns: 7645041785100000 ns
posixtimers hash table entries: 1024 (order: 1, 8192 bytes, linear)
futex hash table entries: 512 (32768 bytes on 1 NUMA nodes, total 32 
KiB, linear).
Machine: QEMU ppce500
SoC family: QorIQ
SoC ID: svr:0x00000000, Revision: 0.0
NET: Registered PF_NETLINK/PF_ROUTE protocol family
audit: initializing netlink subsys (disabled)
audit: type=2000 audit(0.224:1): state=initialized audit_enabled=0 res=1

------------[ cut here ]------------
WARNING: CPU: 1 PID: 1 at mm/hugetlb.c:4753 hugetlb_add_hstate+0x170/0x178
Modules linked in:
CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W 
6.18.0-rc4-00026-g274928854644-dirty #1706 NONE
Tainted: [W]=WARN
Hardware name: QEMU ppce500 e5500 0x80240020 QEMU e500
NIP:  c2027d88 LR: c200bab4 CTR: 00000008
REGS: c50cdce0 TRAP: 0700   Tainted: G        W 
(6.18.0-rc4-00026-g274928854644-dirty)
MSR:  00029002 <CE,EE,ME>  CR: 48000824  XER: 20000000

GPR00: c200bab4 c50cddd0 c50f0000 0000000a 00029002 0000002c c24c0000 
00000003
GPR08: 00001000 10000000 c24f7ab4 00000004 44000828 00000000 c00043b8 
00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 c24be774 c205c024 
c20000c4
GPR24: c5138a80 00000000 c23b74dc 00000000 00000180 c24f7934 00400000 
c24f7ab4
NIP [c2027d88] hugetlb_add_hstate+0x170/0x178
LR [c200bab4] hugetlbpage_init+0x98/0x118
Call Trace:
[c50cddd0] [c0017de0] udbg_uart_putc+0x48/0x94 (unreliable)
[c50cde00] [c200bab4] hugetlbpage_init+0x98/0x118
[c50cde30] [c0004130] do_one_initcall+0x58/0x228
[c50cdea0] [c200162c] kernel_init_freeable+0x224/0x3c8
[c50cdee0] [c00043d8] kernel_init+0x20/0x148
[c50cdf00] [c0015224] ret_from_kernel_user_thread+0x10/0x18
---- interrupt: 0 at 0x0
Code: 60000000 60000000 2f8a0000 41deff28 83810020 83a10024 83c10028 
83e1002c 38210030 4e800020 0fe00000 0fe00000 <0fe00000> 4bffff24 
3d20c24d 9421ff60
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1 at mm/hugetlb.c:4753 hugetlb_add_hstate+0x170/0x178
Modules linked in:
CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W 
6.18.0-rc4-00026-g274928854644-dirty #1706 NONE
Tainted: [W]=WARN
Hardware name: QEMU ppce500 e5500 0x80240020 QEMU e500
NIP:  c2027d88 LR: c200bab4 CTR: 00000006
REGS: c50cdce0 TRAP: 0700   Tainted: G        W 
(6.18.0-rc4-00026-g274928854644-dirty)
MSR:  00029002 <CE,EE,ME>  CR: 44000224  XER: 20000000

GPR00: c200bab4 c50cddd0 c50f0000 0000000c c100e27a 00000002 c24c0000 
00000004
GPR08: 00001000 00400000 c24f7b34 ffffffff 48000824 00000000 c00043b8 
00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 c24be774 c205c024 
c20000c4
GPR24: c5138a80 00000001 c23b74dc 00000000 00000200 c24f7934 01000000 
c24f7b34
NIP [c2027d88] hugetlb_add_hstate+0x170/0x178
LR [c200bab4] hugetlbpage_init+0x98/0x118
Call Trace:
[c50cddd0] [c2027d2c] hugetlb_add_hstate+0x114/0x178 (unreliable)
[c50cde00] [c200bab4] hugetlbpage_init+0x98/0x118
[c50cde30] [c0004130] do_one_initcall+0x58/0x228
[c50cdea0] [c200162c] kernel_init_freeable+0x224/0x3c8
[c50cdee0] [c00043d8] kernel_init+0x20/0x148
[c50cdf00] [c0015224] ret_from_kernel_user_thread+0x10/0x18
---- interrupt: 0 at 0x0
Code: 60000000 60000000 2f8a0000 41deff28 83810020 83a10024 83c10028 
83e1002c 38210030 4e800020 0fe00000 0fe00000 <0fe00000> 4bffff24 
3d20c24d 9421ff60
---[ end trace 0000000000000000 ]---
Found FSL PCI host bridge at 0x0000000fe0008000. Firmware bus number: 0->255
PCI host bridge /pci@fe0008000 (primary) ranges:
  MEM 0x0000000c00000000..0x0000000c1fffffff -> 0x00000000e0000000
   IO 0x0000000fe1000000..0x0000000fe100ffff -> 0x0000000000000000
/pci@fe0008000: PCICSRBAR @ 0xdff00000
setup_pci_atmu: end of DRAM 40000000
fsl-pamu: fsl_pamu_init: could not find a PAMU node
PCI: Probing PCI hardware
fsl-pci fe0008000.pci: PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
pci_bus 0000:00: root bus resource [mem 0xc00000000-0xc1fffffff] (bus 
address [0xe0000000-0xffffffff])
pci_bus 0000:00: root bus resource [bus 00-ff]
pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to ff
pci 0000:00:00.0: [1957:0030] type 00 class 0x0b2000 conventional PCI 
endpoint
pci 0000:00:00.0: BAR 0 [mem 0xdff00000-0xdfffffff]
pci 0000:00:01.0: [8086:100e] type 00 class 0x020000 conventional PCI 
endpoint
pci 0000:00:01.0: BAR 0 [mem 0x00000000-0x0001ffff]
pci 0000:00:01.0: BAR 1 [io  0x0000-0x003f]
pci 0000:00:01.0: ROM [mem 0x00000000-0x0003ffff pref]
pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
pci 0000:00:01.0: ROM [mem 0xc00000000-0xc0003ffff pref]: assigned
pci 0000:00:01.0: BAR 0 [mem 0xc00040000-0xc0005ffff]: assigned
pci 0000:00:01.0: BAR 1 [io  0x1000-0x103f]: assigned
pci_bus 0000:00: resource 4 [io  0x0000-0xffff]
pci_bus 0000:00: resource 5 [mem 0xc00000000-0xc1fffffff]
HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 1.00 GiB page
HugeTLB: registered 64.0 MiB page size, pre-allocated 1 pages
HugeTLB: 0 KiB vmemmap can be freed for a 64.0 MiB page
HugeTLB: registered 256 MiB page size, pre-allocated 1 pages
HugeTLB: 0 KiB vmemmap can be freed for a 256 MiB page
HugeTLB: registered 4.00 MiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 4.00 MiB page
HugeTLB: registered 16.0 MiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 16.0 MiB page


Christophe