Re: [PATCH 2/3] ARM : kdump : add arch_crash_save_vmcoreinfo

Liu hua
2014-04-14T12:41:34Z

于 2014/4/14 19:37, Will Deacon 写道:
> On Thu, Mar 27, 2014 at 08:00:39AM +0000, Liu Hua wrote:
>> For vmcore generated by LPAE enabled kernel, user space
>> utility such as crash needs additional infomation to
>> parse.
>>
>> So this patch add arch_crash_save_vmcoreinfo as what PAE enabled
>> i386 linux does.
>
> Looks sensible to me:
>
> Reviewed-by: Will Deacon <will.deacon@arm.com>
>
> Will

Hi Will,

Thanks to you reply. How about the first one of the patch
series named "[PATCH 1/3] ARM : kdump : Add LPAE support".

Now the ARM linux will simply return error when parse an
LPAE enabled kernel, becausethe commit 4b3bf7ae provide
zero vmcore_elf64_check_arch(). So if we want parse LPAE
enabled kernel, we need that one.

Thanks,
Liu Hua
>
>> Signed-off-by: Liu Hua <sdu.liu@huawei.com>
>> To: Russell King <linux@arm.linux.org.uk>
>> Cc: Stephen Warren <swarren@nvidia.com>
>> Cc: Will Deacon <will.deacon@arm.com>
>> Cc: Vijaya Kumar K <vijay.kilari@gmail.com>
>> Cc: <linux-arm-kernel@lists.infradead.org>
>> Cc: <linux-kernel@vger.kernel.org>
>> Cc: <kexec@lists.infradead.org>
>> ---
>> arch/arm/kernel/machine_kexec.c | 7 +++++++
>> 1 file changed, 7 insertions(+)
>>
>> diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
>> index f0d180d..8cf0996 100644
>> --- a/arch/arm/kernel/machine_kexec.c
>> +++ b/arch/arm/kernel/machine_kexec.c
>> @@ -184,3 +184,10 @@ void machine_kexec(struct kimage *image)
>>
>> soft_restart(reboot_entry_phys);
>> }
>> +
>> +void arch_crash_save_vmcoreinfo(void)
>> +{
>> +#ifdef CONFIG_ARM_LPAE
>> + VMCOREINFO_CONFIG(ARM_LPAE);
>> +#endif
>> +}
>> --
>> 1.9.0
>>
>>
>
> .
>