Displaying 3 results from an estimated 3 matches for "pte_rdon".
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perdon
2024 Jan 24
1
[PATCH] mm: Remove double faults once write a device pfn
...>> >>>> What? How do you got to this conclusion?
>> >>> Sorry. I did not mention that this problem only exists on arm64 platform.
>> >> Ok, that makes at least a little bit more sense.
>> >>
>> >>> Because on arm64 platform the PTE_RDONLY is automatically attached
>> >>> to the userspace pte entries even through VM_WRITE + VM_SHARE.
>> >>> The PTE_RDONLY needs to be cleared in vmf_insert_pfn_prot. However
>> >>> vmf_insert_pfn_prot do not make the pte writable passing false
>> &g...
2024 Jan 23
2
[PATCH] mm: Remove double faults once write a device pfn
...pfn writable so the pte entry is normally read-only or dirty
>>> catching.
>> What? How do you got to this conclusion?
> Sorry. I did not mention that this problem only exists on arm64 platform.
Ok, that makes at least a little bit more sense.
> Because on arm64 platform the PTE_RDONLY is automatically attached to
> the userspace pte entries even through VM_WRITE + VM_SHARE.
> The PTE_RDONLY needs to be cleared in vmf_insert_pfn_prot. However
> vmf_insert_pfn_prot do not make the pte writable passing false @mkwrite
> to insert_pfn.
Question is why is arm64 doing t...
2024 Jan 24
2
[PATCH] mm: Remove double faults once write a device pfn
...only or dirty
>>>>> catching.
>>>> What? How do you got to this conclusion?
>>> Sorry. I did not mention that this problem only exists on arm64 platform.
>> Ok, that makes at least a little bit more sense.
>>
>>> Because on arm64 platform the PTE_RDONLY is automatically attached to
>>> the userspace pte entries even through VM_WRITE + VM_SHARE.
>>> The PTE_RDONLY needs to be cleared in vmf_insert_pfn_prot. However
>>> vmf_insert_pfn_prot do not make the pte writable passing false
>>> @mkwrite to insert_pfn.
&...