On 2013-6-14 20:23, Tomasz Nowicki wrote:
W dniu 14.06.2013 11:53, Hanjun Guo pisze:
PM Event and Control registers and other ACPI fixed hardware features were not supported on ARM64 yet, so we need enable reduced hardware as described in ACPI 5.0.
I met a boot panic failure on the ARMv8 model,
[ 9.024370] Unable to handle kernel paging request at virtual address ffffffbffbe00001 [ 9.024423] pgd = ffffffc00007d000 [ 9.024468] [ffffffbffbe00001] *pgd=000000008007f003, *pmd=0000000000000000 [ 9.024538] Internal error: Oops: 96000006 [#1] SMP [ 9.024577] Modules linked in: [ 9.024627] CPU: 0 Not tainted (3.9.0+ #3) [ 9.024691] PC is at acpi_os_read_port+0x58/0xc8 [ 9.024753] LR is at acpi_hw_read_port+0x4c/0xc4 [ 9.024810] pc : [<ffffffc0002810cc>] lr : [<ffffffc0002a4fc4>] pstate: 600003c5 .... [ 9.031956] Call trace: [ 9.032021] [<ffffffc0002810cc>] acpi_os_read_port+0x58/0xc8 [ 9.032094] [<ffffffc0002a4fc4>] acpi_hw_read_port+0x4c/0xc4 [ 9.032165] [<ffffffc0002a4198>] acpi_hw_read+0x6c/0x100 [ 9.032237] [<ffffffc0002a4250>] acpi_hw_read_multiple+0x24/0x70 [ 9.032312] [<ffffffc0002a457c>] acpi_hw_register_read+0xa8/0x164 [ 9.032386] [<ffffffc0002a52dc>] acpi_write_bit_register+0x9c/0x194 [ 9.032472] [<ffffffc0002bffb4>] acpi_processor_get_power_info+0x6c4/0x748 [ 9.032550] [<ffffffc000565220>] acpi_processor_power_init+0xac/0x138 [ 9.032630] [<ffffffc0003f3c00>] acpi_processor_start+0x48/0x138 [ 9.032704] [<ffffffc000565118>] acpi_processor_add+0x43c/0x498 [ 9.032784] [<ffffffc000283a74>] acpi_device_probe+0x3c/0x198 [ 9.032862] [<ffffffc0002ef0fc>] driver_probe_device+0x90/0x348 [ 9.032940] [<ffffffc0002ef450>] __driver_attach+0x9c/0xa0 [ 9.033015] [<ffffffc0002ed40c>] bus_for_each_dev+0x4c/0x8c [ 9.033090] [<ffffffc0002eeb98>] driver_attach+0x20/0x28 [ 9.033166] [<ffffffc0002ee6e0>] bus_add_driver+0xfc/0x254 [ 9.033244] [<ffffffc0002ef8b0>] driver_register+0x6c/0x184 [ 9.033325] [<ffffffc000284894>] acpi_bus_register_driver+0x34/0x44 [ 9.033400] [<ffffffc000559c60>] acpi_processor_init+0x28/0x40 [ 9.033469] [<ffffffc000081438>] do_one_initcall+0x100/0x138 [ 9.033544] [<ffffffc0005448c8>] kernel_init_freeable+0x128/0x1cc [ 9.033620] [<ffffffc0003f2f90>] kernel_init+0x10/0xcc [ 9.033700] Code: d2bf7c02 f2dff7e2 f2ffffe2 8b020000 (79400000) [ 9.033843] ---[ end trace 64376967e6bc20a9 ]--- [ 9.033995] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
Since PM control register is not exist on ARM64, It will cause such failure.
Does PM control register exist on ARM?
PM control registers here are ACPI PM control registers, which described in ACPI5.0 section 4.8, so I think they are not exist on ARM at present.
Thanks Hanjun
ACPICA provided a macro to enable reduced hardware feature, and functions deal with ACPI hardware will defined as empty when ACPI_REDUCED_HARDWARE is TRUE, so we can avoid panic when excute the ACPI driver code.
Signed-off-by: Hanjun Guo hanjun.guo@linaro.org
include/acpi/acconfig.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) mode change 100644 => 100755 arch/arm64/boot/install.sh
diff --git a/arch/arm64/boot/install.sh b/arch/arm64/boot/install.sh old mode 100644 new mode 100755 diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h index 14ceff7..cb80ea9 100644 --- a/include/acpi/acconfig.h +++ b/include/acpi/acconfig.h @@ -100,7 +100,7 @@
ACPI PM timerFACS table (Waking vectors and Global Lock)*/ -#define ACPI_REDUCED_HARDWARE FALSE +#define ACPI_REDUCED_HARDWARE TRUE
/******************************************************************************