Le 29/04/2019 à 10:20, Serge Belyshev a écrit :
Hi!
As pointed by Segher, those are not correct, bat 2 for instance should
be 0xc0c00000-0xc0ffffff
Could you try the below changes ?
commit 5953416b8ef52107e8f04559a08a90aa5368cfcd
Author: Christophe Leroy <christophe.le...@c-s.fr>
Date: Mon Apr 29 07:22:08 2019 +0000
powerpc/32s: fix BATs setting with CONFIG_STRICT_KERNEL_RWX
The box did boot successfully, and survived disk read test, thanks!
Here is the new debug information for the record:
Thanks for testing. I'll send a proper patch to Michael
/sys/kernel/debug/kernel_page_tables
---[ Start of kernel VM ]---
0xe0000000-0xefffffff 0x20000000 256M rw present
dirty accessed
The above looks a lot better.
It shows that 256M of RAM is not mapped with bats.
I'd recommend you to change CONFIG_DATA_SHIFT to 23 (you need
CONFIG_ADVANCED_OPTIONS and CONFIG_DATA_SHIFT_BOOL to be able to wave
the default value), that should free some bats used for small blocks and
make it available for mapping that area.
/sys/kernel/debug/powerpc/block_address_translation
---[ Instruction Block Address Translation ]---
0: 0xc0000000-0xc07fffff 0x00000000 Kernel EXEC coherent
1: 0xc0800000-0xc087ffff 0x00800000 Kernel EXEC coherent
2: -
3: -
4: -
5: -
6: -
7: -
---[ Data Block Address Translation ]---
0: 0xc0000000-0xc07fffff 0x00000000 Kernel RO coherent
1: 0xc0800000-0xc0bfffff 0x00800000 Kernel RO coherent
2: 0xc0c00000-0xc0ffffff 0x00c00000 Kernel RW coherent
3: 0xc1000000-0xc1ffffff 0x01000000 Kernel RW coherent
4: 0xc2000000-0xc3ffffff 0x02000000 Kernel RW coherent
5: 0xc4000000-0xc7ffffff 0x04000000 Kernel RW coherent
6: 0xc8000000-0xcfffffff 0x08000000 Kernel RW coherent
7: 0xd0000000-0xdfffffff 0x10000000 Kernel RW coherent
Looks as it should be. So you now have:
8M + 4M are Read Only
4M + 16M + 32M + 64M + 128M + 256M are Read Write
256M mapped by pages as there are only 8 bats.
With the change I suggested above, you should end up with:
16M be Read Only
16M + 32M + 64M + 128M + 256M + 256M be Read Write.
Christophe
/sys/kernel/debug/powerpc/segment_registers
---[ User Segments ]---
0x00000000-0x0fffffff Kern key 1 User key 1 VSID 0x5d84d0
0x10000000-0x1fffffff Kern key 1 User key 1 VSID 0x5d85e1
0x20000000-0x2fffffff Kern key 1 User key 1 VSID 0x5d86f2
0x30000000-0x3fffffff Kern key 1 User key 1 VSID 0x5d8803
0x40000000-0x4fffffff Kern key 1 User key 1 VSID 0x5d8914
0x50000000-0x5fffffff Kern key 1 User key 1 VSID 0x5d8a25
0x60000000-0x6fffffff Kern key 1 User key 1 VSID 0x5d8b36
0x70000000-0x7fffffff Kern key 1 User key 1 VSID 0x5d8c47
0x80000000-0x8fffffff Kern key 1 User key 1 VSID 0x5d8d58
0x90000000-0x9fffffff Kern key 1 User key 1 VSID 0x5d8e69
0xa0000000-0xafffffff Kern key 1 User key 1 VSID 0x5d8f7a
0xb0000000-0xbfffffff Kern key 1 User key 1 VSID 0x5d908b
---[ Kernel Segments ]---
0xc0000000-0xcfffffff Kern key 0 User key 1 No Exec VSID 0x000ccc
0xd0000000-0xdfffffff Kern key 0 User key 1 No Exec VSID 0x000ddd
0xe0000000-0xefffffff Kern key 0 User key 1 No Exec VSID 0x000eee
0xf0000000-0xffffffff Kern key 0 User key 1 No Exec VSID 0x000fff
first lines of dmesg
[ 0.000000] Total memory = 1024MB; using 2048kB for hash table (at (ptrval))
[ 0.000000] Linux version 5.1.0-rc7-dirty (ssb@spider) (gcc version 9.0.1
20190426 (prerelease) (GCC)) #1193 PREEMPT Mon Apr 29 10:59:53 MSK 2019
[ 0.000000] Found UniNorth memory controller & host bridge @ 0xf8000000
revision: 0xd2
[ 0.000000] Mapped at 0xff7c0000
[ 0.000000] Found a Intrepid mac-io controller, rev: 0, mapped at 0x(ptrval)
[ 0.000000] Processor NAP mode on idle enabled.
[ 0.000000] PowerMac motherboard: PowerBook G4 15"
[ 0.000000] Using PowerMac machine description
[ 0.000000] printk: bootconsole [udbg0] enabled
[ 0.000000] -----------------------------------------------------
[ 0.000000] Hash_size = 0x200000
[ 0.000000] phys_mem_size = 0x40000000
[ 0.000000] dcache_bsize = 0x20
[ 0.000000] icache_bsize = 0x20
[ 0.000000] cpu_features = 0x000000002510600a
[ 0.000000] possible = 0x000000002f7ff14b
[ 0.000000] always = 0x0000000000000000
[ 0.000000] cpu_user_features = 0x9c000001 0x00000000
[ 0.000000] mmu_features = 0x00010001
[ 0.000000] Hash = 0x(ptrval)
[ 0.000000] Hash_mask = 0x7fff
[ 0.000000] -----------------------------------------------------
[ 0.000000] Found UniNorth PCI host bridge at 0x00000000f0000000. Firmware bus
number: 0->1
[ 0.000000] PCI host bridge /pci@f0000000 ranges:
[ 0.000000] MEM 0x00000000f1000000..0x00000000f1ffffff -> 0x00000000f1000000
[ 0.000000] IO 0x00000000f0000000..0x00000000f07fffff -> 0x0000000000000000
[ 0.000000] MEM 0x00000000b0000000..0x00000000bfffffff -> 0x00000000b0000000
[ 0.000000] Found UniNorth PCI host bridge at 0x00000000f2000000. Firmware bus
number: 0->1
[ 0.000000] PCI host bridge /pci@f2000000 (primary) ranges:
[ 0.000000] MEM 0x00000000f3000000..0x00000000f3ffffff -> 0x00000000f3000000
[ 0.000000] IO 0x00000000f2000000..0x00000000f27fffff -> 0x0000000000000000
[ 0.000000] MEM 0x0000000080000000..0x00000000afffffff -> 0x0000000080000000
[ 0.000000] Found UniNorth PCI host bridge at 0x00000000f4000000. Firmware bus
number: 0->1
[ 0.000000] PCI host bridge /pci@f4000000 ranges:
[ 0.000000] MEM 0x00000000f5000000..0x00000000f5ffffff -> 0x00000000f5000000
[ 0.000000] IO 0x00000000f4000000..0x00000000f47fffff -> 0x0000000000000000
[ 0.000000] via-pmu: Server Mode is disabled
[ 0.000000] PMU driver v2 initialized for Core99, firmware: 0c
[ 0.000000] Top of RAM: 0x40000000, Total RAM: 0x40000000
[ 0.000000] Memory hole size: 0MB
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x000000002fffffff]
[ 0.000000] HighMem [mem 0x0000000030000000-0x000000003fffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000003fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000003fffffff]
[ 0.000000] On node 0 totalpages: 262144
[ 0.000000] Normal zone: 1536 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 196608 pages, LIFO batch:63
[ 0.000000] HighMem zone: 65536 pages, LIFO batch:15
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 260608
[ 0.000000] Kernel command line: root=/dev/hda3 ro console=ttyUSB0,115200
console=tty0 consoleblank=120
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] Memory: 1023076K/1048576K available (8704K kernel code, 352K
rwdata, 1344K rodata, 208K init, 1176K bss, 25500K reserved, 0K cma-reserved,
262144K highmem)
[ 0.000000] Kernel virtual memory layout:
[ 0.000000] * 0xfffcf000..0xfffff000 : fixmap
[ 0.000000] * 0xff800000..0xffc00000 : highmem PTEs
[ 0.000000] * 0xfde2b000..0xff800000 : early ioremap
[ 0.000000] * 0xf1000000..0xfde2b000 : vmalloc & ioremap
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
