Hi all
I notice we have hibernation.c in arm/kernel, however, I don't find it in arm64. Does it mean arm64 do not support hibernation/suspend-to-disk function?
I tried some path to search the reason, but found nothing, they all say arm64 has the backward compatibility. So I send this email to the community and hope to get the reason. Thanks!
I ported the arm hibernation.c to arm64/kernel(with LP64), but failed in a strange way. When I do resume, the arch_restore_image() get a page_fault when it calls the copy_page(), like: "Unable to handle kernel paging request at virtual address 0xffffffbc055c3fa8" I'm sure the copy_page()'s parameters is in the memory area, why and how I get the strange address 0xffffffbc055c3fa8?
vmalloc: 0xffffff8000000000 - 0xffffffbb00000000 vmemmap: 0xffffffbc01400000 - 0xffffffbc04f88000 modules: 0xffffffbffc000000 - 0xffffffc000000000 memory: 0xffffffc000000000 - 0xffffffc0be800000
Look forward to your reply, thanks!
(Fixing Sebastian's email address)
On Sat, Jan 10, 2015 at 8:44 PM, George Bush georgebush815@gmail.com wrote:
Hi all
I notice we have hibernation.c in arm/kernel, however, I don't find it in arm64. Does it mean arm64 do not support hibernation/suspend-to-disk function?
Correct. arm64 is a separate architecture and will need to implement something similar to SHA 603fb42a66499ab353466c7afa3d38beea20a8a9.
I tried some path to search the reason, but found nothing, they all say arm64 has the backward compatibility. So I send this email to the community and hope to get the reason. Thanks!
I ported the arm hibernation.c to arm64/kernel(with LP64), but failed in a strange way. When I do resume, the arch_restore_image() get a page_fault when it calls the copy_page(), like:
I'm afraid I can't help with the memory management aspects of arm64 but you've cc'ed the right people who'd know.
"Unable to handle kernel paging request at virtual address 0xffffffbc055c3fa8" I'm sure the copy_page()'s parameters is in the memory area, why and how I get the strange address 0xffffffbc055c3fa8?
vmalloc: 0xffffff8000000000 - 0xffffffbb00000000 vmemmap: 0xffffffbc01400000 - 0xffffffbc04f88000 modules: 0xffffffbffc000000 - 0xffffffc000000000 memory: 0xffffffc000000000 - 0xffffffc0be800000
On Sat, Jan 10, 2015 at 03:14:33PM +0000, George Bush wrote:
Hi all
I notice we have hibernation.c in arm/kernel, however, I don't find it in arm64. Does it mean arm64 do not support hibernation/suspend-to-disk function?
Yes, not at the moment, but we have planned to implement it.
I tried some path to search the reason, but found nothing, they all say arm64 has the backward compatibility. So I send this email to the community and hope to get the reason. Thanks!
I ported the arm hibernation.c to arm64/kernel(with LP64), but failed in a strange way. When I do resume, the arch_restore_image() get a page_fault when it calls the copy_page(), like: "Unable to handle kernel paging request at virtual address 0xffffffbc055c3fa8" I'm sure the copy_page()'s parameters is in the memory area, why and how I get the strange address 0xffffffbc055c3fa8?
vmalloc: 0xffffff8000000000 - 0xffffffbb00000000 vmemmap: 0xffffffbc01400000 - 0xffffffbc04f88000 modules: 0xffffffbffc000000 - 0xffffffc000000000 memory: 0xffffffc000000000 - 0xffffffc0be800000
Look forward to your reply, thanks!
We need your patch, kernel version, config file, your board/SoC HW details before even assuming what is happening. Please provide them and I am happy to help you implement suspend-to-disk on arm64 properly.
Thanks, Lorenzo
linaro-kernel@lists.linaro.org
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Amit Kucheria -
George Bush -
Lorenzo Pieralisi