On 3/1/2021 1:22 AM, Serge Semin wrote:

On Sun, Feb 28, 2021 at 07:50:45PM -0800, Florian Fainelli wrote:

quoted

Hi Serge,

On 2/28/2021 3:08 PM, Serge Semin wrote:

quoted

Hi folks,
What you've got here seems a more complicated problem than it
could originally look like. Please, see my comments below.

(Note I've discarded some of the email logs, which of no interest
to the discovered problem. Please also note that I haven't got any
Broadcom hardware to test out a solution suggested below.)

On Sun, Feb 28, 2021 at 10:19:51AM -0800, Florian Fainelli wrote:

quoted

Hi Mike,

On 2/28/2021 1:00 AM, Mike Rapoport wrote:

quoted

Hi Florian,

On Sat, Feb 27, 2021 at 08:18:47PM -0800, Florian Fainelli wrote:

quoted

quoted

quoted

quoted

[...]

quoted

quoted

quoted

Hi Roman, Thomas and other linux-mips folks,

Kamal and myself have been unable to boot v5.11 on MIPS since this
commit, reverting it makes our MIPS platforms boot successfully. We do
not see a warning like this one in the commit message, instead what
happens appear to be a corrupted Device Tree which prevents the parsing
of the "rdb" node and leading to the interrupt controllers not being
registered, and the system eventually not booting.

The Device Tree is built-into the kernel image and resides at
arch/mips/boot/dts/brcm/bcm97435svmb.dts.

Do you have any idea what could be wrong with MIPS specifically here?

Most likely the problem you've discovered has been there for quite
some time. The patch you are referring to just caused it to be
triggered by extending the early allocation range. See before that
patch was accepted the early memory allocations had been performed
in the range:
[kernel_end, RAM_END].
The patch changed that, so the early allocations are done within
[RAM_START + PAGE_SIZE, RAM_END].

In normal situations it's safe to do that as long as all the critical
memory regions (including the memory residing a space below the
kernel) have been reserved. But as soon as a memory with some critical
structures haven't been reserved, the kernel may allocate it to be used
for instance for early initializations with obviously unpredictable but
most of the times unpleasant consequences.

quoted

quoted

Apparently there is a memblock allocation in one of the functions called
from arch_mem_init() between plat_mem_setup() and
early_init_fdt_reserve_self().

Mike, alas according to the log provided by Florian that's not the reason
of the problem. Please, see my considerations below.

quoted

[...]

[    0.000000] Linux version 5.11.0-g5695e5161974 (florian@localhost)
(mipsel-linux-gcc (GCC) 8.3.0, GNU ld (GNU Binutils) 2.32) #84 SMP Sun
Feb 28 10:01:50 PST 2021
[    0.000000] CPU0 revision is: 00025b00 (Broadcom BMIPS5200)
[    0.000000] FPU revision is: 00130001

quoted

[    0.000000] memblock_add: [0x00000000-0x0fffffff]
early_init_dt_scan_memory+0x160/0x1e0
[    0.000000] memblock_add: [0x20000000-0x4fffffff]
early_init_dt_scan_memory+0x160/0x1e0
[    0.000000] memblock_add: [0x90000000-0xcfffffff]
early_init_dt_scan_memory+0x160/0x1e0

Here the memory has been added to the memblock allocator.

quoted

[    0.000000] MIPS: machine is Broadcom BCM97435SVMB
[    0.000000] earlycon: ns16550a0 at MMIO32 0x10406b00 (options '')
[    0.000000] printk: bootconsole [ns16550a0] enabled

quoted

[    0.000000] memblock_reserve: [0x00aa7600-0x00aaa0a0]
setup_arch+0x128/0x69c

Here the fdt memory has been reserved. (Note it's built into the
kernel.)

quoted

[    0.000000] memblock_reserve: [0x00010000-0x018313cf]
setup_arch+0x1f8/0x69c

Here the kernel itself together with built-in dtb have been reserved.
So far so good.

quoted

[    0.000000] Initrd not found or empty - disabling initrd

quoted

[    0.000000] memblock_alloc_try_nid: 10913 bytes align=0x40 nid=-1
from=0x00000000 max_addr=0x00000000
early_init_dt_alloc_memory_arch+0x40/0x84
[    0.000000] memblock_reserve: [0x00001000-0x00003aa0]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 32680 bytes align=0x4 nid=-1
from=0x00000000 max_addr=0x00000000
early_init_dt_alloc_memory_arch+0x40/0x84
[    0.000000] memblock_reserve: [0x00003aa4-0x0000ba4b]
memblock_alloc_range_nid+0xf8/0x198

The log above most likely belongs to the call-chain:
setup_arch()
+-> arch_mem_init()
    +-> device_tree_init() - BMIPS specific method
        +-> unflatten_and_copy_device_tree()

So to speak here we've copied the fdt from the original space
[0x00aa7600-0x00aaa0a0] into [0x00001000-0x00003aa0] and unflattened
it to [0x00003aa4-0x0000ba4b].

The problem is that a bit later the next call-chain is performed:
setup_arch()
+-> plat_smp_setup()
    +-> mp_ops->smp_setup(); - registered by prom_init()->register_bmips_smp_ops();
        +-> if (!board_ebase_setup)
                 board_ebase_setup = &bmips_ebase_setup;

So at the moment of the CPU traps initialization the bmips_ebase_setup()
method is called. What trap_init() does isn't compatible with the
allocation performed by the unflatten_and_copy_device_tree() method.
See the next comment.

quoted

[    0.000000] memblock_alloc_try_nid: 25 bytes align=0x4 nid=-1
from=0x00000000 max_addr=0x00000000
early_init_dt_alloc_memory_arch+0x40/0x84
[    0.000000] memblock_reserve: [0x0000ba4c-0x0000ba64]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_reserve: [0x0096a000-0x00969fff]
setup_arch+0x3fc/0x69c
[    0.000000] memblock_alloc_try_nid: 32 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 setup_arch+0x4e0/0x69c
[    0.000000] memblock_reserve: [0x0000ba80-0x0000ba9f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 32 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 setup_arch+0x4e0/0x69c
[    0.000000] memblock_reserve: [0x0000bb00-0x0000bb1f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 32 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 setup_arch+0x4e0/0x69c
[    0.000000] memblock_reserve: [0x0000bb80-0x0000bb9f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 64
bytes.
[    0.000000] Primary data cache 32kB, 4-way, VIPT, no aliases,
linesize 32 bytes
[    0.000000] MIPS secondary cache 512kB, 8-way, linesize 128 bytes.
[    0.000000] memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1
from=0x00000000 max_addr=0xffffffff fixrange_init+0x90/0xf4
[    0.000000] memblock_reserve: [0x0000c000-0x0000cfff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1
from=0x00000000 max_addr=0xffffffff fixrange_init+0x90/0xf4
[    0.000000] memblock_reserve: [0x0000d000-0x0000dfff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1
from=0x00000000 max_addr=0xffffffff fixrange_init+0x90/0xf4
[    0.000000] memblock_reserve: [0x0000e000-0x0000efff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x000000000fffffff]
[    0.000000]   HighMem  [mem 0x0000000010000000-0x00000000cfffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000000fffffff]
[    0.000000]   node   0: [mem 0x0000000020000000-0x000000004fffffff]
[    0.000000]   node   0: [mem 0x0000000090000000-0x00000000cfffffff]
[    0.000000] Initmem setup node 0 [mem
0x0000000000000000-0x00000000cfffffff]
[    0.000000] memblock_alloc_try_nid: 27262976 bytes align=0x80 nid=0
from=0x00000000 max_addr=0x00000000
alloc_node_mem_map.constprop.135+0x6c/0xc8
[    0.000000] memblock_reserve: [0x01831400-0x032313ff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 32 bytes align=0x80 nid=0
from=0x00000000 max_addr=0x00000000 setup_usemap+0x64/0x98
[    0.000000] memblock_reserve: [0x0000bc00-0x0000bc1f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 384 bytes align=0x80 nid=0
from=0x00000000 max_addr=0x00000000 setup_usemap+0x64/0x98
[    0.000000] memblock_reserve: [0x0000bc80-0x0000bdff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] MEMBLOCK configuration:
[    0.000000]  memory size = 0x80000000 reserved size = 0x0322f032
[    0.000000]  memory.cnt  = 0x3
[    0.000000]  memory[0x0]     [0x00000000-0x0fffffff], 0x10000000
bytes flags: 0x0
[    0.000000]  memory[0x1]     [0x20000000-0x4fffffff], 0x30000000
bytes flags: 0x0
[    0.000000]  memory[0x2]     [0x90000000-0xcfffffff], 0x40000000
bytes flags: 0x0
[    0.000000]  reserved.cnt  = 0xa
[    0.000000]  reserved[0x0]   [0x00001000-0x00003aa0], 0x00002aa1
bytes flags: 0x0
[    0.000000]  reserved[0x1]   [0x00003aa4-0x0000ba64], 0x00007fc1
bytes flags: 0x0
[    0.000000]  reserved[0x2]   [0x0000ba80-0x0000ba9f], 0x00000020
bytes flags: 0x0
[    0.000000]  reserved[0x3]   [0x0000bb00-0x0000bb1f], 0x00000020
bytes flags: 0x0
[    0.000000]  reserved[0x4]   [0x0000bb80-0x0000bb9f], 0x00000020
bytes flags: 0x0
[    0.000000]  reserved[0x5]   [0x0000bc00-0x0000bc1f], 0x00000020
bytes flags: 0x0
[    0.000000]  reserved[0x6]   [0x0000bc80-0x0000bdff], 0x00000180
bytes flags: 0x0
[    0.000000]  reserved[0x7]   [0x0000c000-0x0000efff], 0x00003000
bytes flags: 0x0
[    0.000000]  reserved[0x8]   [0x00010000-0x018313cf], 0x018213d0
bytes flags: 0x0
[    0.000000]  reserved[0x9]   [0x01831400-0x032313ff], 0x01a00000
bytes flags: 0x0
[    0.000000] memblock_alloc_try_nid: 30 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 start_kernel+0x12c/0x654
[    0.000000] memblock_reserve: [0x0000be00-0x0000be1d]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 30 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 start_kernel+0x150/0x654
[    0.000000] memblock_reserve: [0x0000be80-0x0000be9d]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_embed_first_chunk+0x3b0/0x884
[    0.000000] memblock_reserve: [0x0000f000-0x0000ffff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 4096 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_embed_first_chunk+0x5a4/0x884
[    0.000000] memblock_reserve: [0x03231400-0x032323ff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 294912 bytes align=0x1000 nid=-1
from=0x01000000 max_addr=0x00000000 pcpu_dfl_fc_alloc+0x24/0x30
[    0.000000] memblock_reserve: [0x03233000-0x0327afff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_free: [0x03245000-0x03244fff]
pcpu_embed_first_chunk+0x7a0/0x884
[    0.000000] memblock_free: [0x03257000-0x03256fff]
pcpu_embed_first_chunk+0x7a0/0x884
[    0.000000] memblock_free: [0x03269000-0x03268fff]
pcpu_embed_first_chunk+0x7a0/0x884
[    0.000000] memblock_free: [0x0327b000-0x0327afff]
pcpu_embed_first_chunk+0x7a0/0x884
[    0.000000] percpu: Embedded 18 pages/cpu s50704 r0 d23024 u73728
[    0.000000] memblock_alloc_try_nid: 4 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_setup_first_chunk+0x178/0x6ec
[    0.000000] memblock_reserve: [0x0000bf00-0x0000bf03]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 4 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_setup_first_chunk+0x1a8/0x6ec
[    0.000000] memblock_reserve: [0x0000bf80-0x0000bf83]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 16 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_setup_first_chunk+0x1dc/0x6ec
[    0.000000] memblock_reserve: [0x03232400-0x0323240f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 16 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_setup_first_chunk+0x20c/0x6ec
[    0.000000] memblock_reserve: [0x03232480-0x0323248f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 128 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_setup_first_chunk+0x558/0x6ec
[    0.000000] memblock_reserve: [0x03232500-0x0323257f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 92 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_alloc_first_chunk+0x8c/0x294
[    0.000000] memblock_reserve: [0x03232580-0x032325db]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 768 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_alloc_first_chunk+0xe0/0x294
[    0.000000] memblock_reserve: [0x03232600-0x032328ff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 772 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_alloc_first_chunk+0x124/0x294
[    0.000000] memblock_reserve: [0x03232900-0x03232c03]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_alloc_try_nid: 192 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 pcpu_alloc_first_chunk+0x158/0x294
[    0.000000] memblock_reserve: [0x03232c80-0x03232d3f]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] memblock_free: [0x0000f000-0x0000ffff]
pcpu_embed_first_chunk+0x838/0x884
[    0.000000] memblock_free: [0x03231400-0x032323ff]
pcpu_embed_first_chunk+0x850/0x884
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 523776
[    0.000000] Kernel command line: console=ttyS0,115200 earlycon
[    0.000000] memblock_alloc_try_nid: 131072 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 alloc_large_system_hash+0x1f8/0x33c
[    0.000000] memblock_reserve: [0x0327b000-0x0329afff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072
bytes, linear)
[    0.000000] memblock_alloc_try_nid: 65536 bytes align=0x80 nid=-1
from=0x00000000 max_addr=0x00000000 alloc_large_system_hash+0x1f8/0x33c
[    0.000000] memblock_reserve: [0x0329b000-0x032aafff]
memblock_alloc_range_nid+0xf8/0x198
[    0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536
bytes, linear)

quoted

[    0.000000] memblock_reserve: [0x00000000-0x000003ff]
trap_init+0x70/0x4e8

Most likely someplace here the corruption has happened. The log above
has just reserved a memory for NMI/reset vectors:
arch/mips/kernel/traps.c: trap_init(void): Line 2373.

But then the board_ebase_setup() pointer is dereferenced and called,
which has been initialized with bmips_ebase_setup() earlier and which
overwrites the ebase variable with: 0x80001000 as this is
CPU_BMIPS5000 CPU. So any further calls of the functions like
set_handler()/set_except_vector()/set_vi_srs_handler()/etc may cause a
corruption of the memory above 0x80001000, which as we have discovered
belongs to fdt and unflattened device tree.

quoted

[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 2045268K/2097152K available (8226K kernel code,
1070K rwdata, 1336K rodata, 13808K init, 260K bss, 51884K reserved, 0K
cma-reserved, 1835008K highmem)
[    0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu:     RCU event tracing is enabled.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay
is 25 jiffies.
[    0.000000] NR_IRQS: 256

quoted

[    0.000000] OF: Bad cell count for /rdb
[    0.000000] irq_bcm7038_l1: failed to remap intc L1 registers
[    0.000000] OF: of_irq_init: children remain, but no parents

So here is the first time we have got the consequence of the corruption
popped up. Luckily it's just the "Bad cells count" error. We could have
got much less obvious log here up to getting a crash at some place
further...

quoted

[    0.000000] random: get_random_bytes called from
start_kernel+0x444/0x654 with crng_init=0
[    0.000000] sched_clock: 32 bits at 250 Hz, resolution 4000000ns,
wraps every 8589934590000000ns

quoted

and with your patch applied which unfortunately did not work we have the
following:

[...]

So a patch like this shall workaround the corruption:

--- a/arch/mips/bmips/setup.c
+++ b/arch/mips/bmips/setup.c

@@ -174,6 +174,8 @@ void __init plat_mem_setup(void)
 
 	__dt_setup_arch(dtb);
 
+	memblock_reserve(0x0, 0x1000 + 0x100*64);
+
 	for (q = bmips_quirk_list; q->quirk_fn; q++) {
 		if (of_flat_dt_is_compatible(of_get_flat_dt_root(),
 					     q->compatible)) {

quoted

This patch works, thanks a lot for the troubleshooting and analysis! How
about the following which would be more generic and works as well and
should be more universal since it does not require each architecture to
provide an appropriate call to memblock_reserve():

Hm, are you sure it's working?

I was until I noticed that I was working on top of a revert of Roman's
patch sorry about the brain fart here.

If so, my analysis hasn't been quite
correct. My suggestion was based on the memory initializations,
allocations and reservations trace. So here is the sequence of most
crucial of them:
1) Memblock initialization:
   start_kernel()->setup_arch()->arch_mem_init()->plat_mem_setup()->__dt_setup_arch()
   (At this point I suggested to place the exceptions memory
    reservation.)
2) Base FDT memory reservation:
   start_kernel()->setup_arch()->arch_mem_init()->early_init_fdt_reserve_self()
3) FDT "reserved-memory" nodes parsing and corresponding memory ranges
   reservation:
   start_kernel()->setup_arch()->arch_mem_init()->early_init_fdt_scan_reserved_mem()
4) Reserve kernel itself, some critical sections like initrd and
   crash-kernel:
   start_kernel()->setup_arch()->arch_mem_init()->bootmem_init()...
5) Copy and unflatten the built-into the kernel device tree
   (BMIPS-platform code):
   start_kernel()->setup_arch()->arch_mem_init()->device_tree_init()
   This is the very first time an allocation from the memblock pool
   is performed. Since we haven't reserved a memory for the exception
   vectors yet, the memblock allocator is free to return that memory
   range for any other use. Needless to say if we try to use that memory
   later without consulting with memblock, we may and in our case
   will get into troubles.
6) Many random early memblock allocations for kernel use before
   buddy and sl*b allocators are up and running...
   Note if for some fortunate reason the allocations made in 5) didn't
   overlap the exceptions memory, here we have much more chances to
   do that with obviously fatal consequences of the ranges independent
   usage.
7) Trap/exception vectors initialization and !memory reservation! for
   them:
   start_kernel()->trap_init()
   Only at this point we get to reserve the memory for the vectors.
8) Init and run buddy/sl*b allocators:
   start_kernel()->mm_init()->...mem_init()...

There are a lot of allocations done in 5) and 6) before the
trap_init() is called in 7). You can see that in your log. That's why
I have doubts that your patch worked well. Most likely you've
forgotten to revert the workaround suggested by me in the previous
message. Could you make sure that you didn't and re-test your patch
again? If it still works then I might have confused something and it's
strange that my patch worked in the first place...

I would like to submit a fix for 5.12-rc1 and get it back ported into
5.11 so we have BMIPS machines boot again, that will be essentially your
earlier proposed fix.

BMIPS is the only "legacy" MIPS platform that defines an exception base,
so while this problem may certainly exist with other platforms, I do
wonder how likely it is there, though?

A food for thoughts for everyone (Thomas, Mark, please join the
discussion). What we've got here is a bit bigger problem. AFAICS
if bottom-up allocation is enabled (it's our case) memblock_find_in_range_node()
performs the allocation above the very first PAGE_SIZE memory chunk
(see that method code for details). So we are currently on a safe side
for some older MIPS platforms. But the platform with VEIC/VINT may get
into the same troubles here if they didn't reserve exception memory
early enough before the kernel starts random allocations from
memblock. So we either need to provide a generic workaround for that
or make sure each platform gets to reserve vectors itself for instance
in the plat_mem_setup() method.

-Sergey

quoted

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index e0352958e2f7..b0a173b500e8 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c

@@ -2367,10 +2367,7 @@ void __init trap_init(void)

        if (!cpu_has_mips_r2_r6) {
                ebase = CAC_BASE;
-               ebase_pa = virt_to_phys((void *)ebase);
                vec_size = 0x400;
-
-               memblock_reserve(ebase_pa, vec_size);
        } else {
                if (cpu_has_veic || cpu_has_vint)
                        vec_size = 0x200 + VECTORSPACING*64;

@@ -2410,6 +2407,14 @@ void __init trap_init(void)

        if (board_ebase_setup)
                board_ebase_setup();
+
+       /* board_ebase_setup() can change the exception base address
+        * reserve it now after changes were made.
+        */
+       if (!cpu_has_mips_r2_r6) {
+               ebase_pa = virt_to_phys((void *)ebase);
+               memblock_reserve(ebase_pa, vec_size);
+       }
        per_cpu_trap_init(true);
        memblock_set_bottom_up(false);

-- 
Florian

-- 
Florian