>>
>> Most probably,
>>
>> struct range memhp_get_addressable_range(bool need_mapping)
>> {
>> ...
>> }
>
> Something like this...
>
> +struct memhp_range {
> + u64 start;
> + u64 end;
> +};
We do have struct range already in include/linux/range.h
> +
> +#ifndef arch_get_addres
On 10/07/2020 02:09 PM, David Hildenbrand wrote:
>>> We do have __add_pages()->check_hotplug_memory_addressable() where we
>>> already check against MAX_PHYSMEM_BITS.
>>
>> Initially, I thought about check_hotplug_memory_addressable() but the
>> existing check that asserts end of hotplug wrt MAX
On Wed, 14 Oct 2020 at 07:07, Anshuman Khandual
wrote:
>
>
>
> On 10/12/2020 12:59 PM, Ard Biesheuvel wrote:
> > On Tue, 6 Oct 2020 at 08:36, Anshuman Khandual
> > wrote:
> >>
> >>
> >>
> >> On 09/30/2020 01:32 PM, Anshuman Khandual wrote:
> >>> But if __is_lm_address() checks against the effecti
On 10/12/2020 12:59 PM, Ard Biesheuvel wrote:
> On Tue, 6 Oct 2020 at 08:36, Anshuman Khandual
> wrote:
>>
>>
>>
>> On 09/30/2020 01:32 PM, Anshuman Khandual wrote:
>>> But if __is_lm_address() checks against the effective linear range instead
>>> i.e [_PAGE_OFFSET(vabits_actual)..(PAGE_END - 1
On Tue, 6 Oct 2020 at 08:36, Anshuman Khandual
wrote:
>
>
>
> On 09/30/2020 01:32 PM, Anshuman Khandual wrote:
> > But if __is_lm_address() checks against the effective linear range instead
> > i.e [_PAGE_OFFSET(vabits_actual)..(PAGE_END - 1)], it can be used for hot
> > plug physical range check
>> We do have __add_pages()->check_hotplug_memory_addressable() where we
>> already check against MAX_PHYSMEM_BITS.
>
> Initially, I thought about check_hotplug_memory_addressable() but the
> existing check that asserts end of hotplug wrt MAX_PHYSMEM_BITS, is
> generic in nature. AFAIK the linear
On 10/06/2020 09:04 PM, David Hildenbrand wrote:
> On 17.09.20 10:46, Anshuman Khandual wrote:
>> During memory hotplug process, the linear mapping should not be created for
>> a given memory range if that would fall outside the maximum allowed linear
>> range. Else it might cause memory corrupt
On 17.09.20 10:46, Anshuman Khandual wrote:
> During memory hotplug process, the linear mapping should not be created for
> a given memory range if that would fall outside the maximum allowed linear
> range. Else it might cause memory corruption in the kernel virtual space.
>
> Maximum linear mapp
On 09/30/2020 01:32 PM, Anshuman Khandual wrote:
> But if __is_lm_address() checks against the effective linear range instead
> i.e [_PAGE_OFFSET(vabits_actual)..(PAGE_END - 1)], it can be used for hot
> plug physical range check there after. Perhaps something like this, though
> not tested prop
On 09/30/2020 04:31 PM, Ard Biesheuvel wrote:
> On Wed, 30 Sep 2020 at 10:03, Anshuman Khandual
> wrote:
>>
>>
>> On 09/29/2020 08:52 PM, Will Deacon wrote:
>>> On Tue, Sep 29, 2020 at 01:34:24PM +0530, Anshuman Khandual wrote:
On 09/29/2020 02:05 AM, Will Deacon wrote:
> On
On Wed, 30 Sep 2020 at 10:03, Anshuman Khandual
wrote:
>
>
> On 09/29/2020 08:52 PM, Will Deacon wrote:
> > On Tue, Sep 29, 2020 at 01:34:24PM +0530, Anshuman Khandual wrote:
> >>
> >>
> >> On 09/29/2020 02:05 AM, Will Deacon wrote:
> >>> On Thu, Sep 17, 2020 at 02:16:42PM +0530, Anshuman Khandual
On 09/29/2020 08:52 PM, Will Deacon wrote:
> On Tue, Sep 29, 2020 at 01:34:24PM +0530, Anshuman Khandual wrote:
>>
>>
>> On 09/29/2020 02:05 AM, Will Deacon wrote:
>>> On Thu, Sep 17, 2020 at 02:16:42PM +0530, Anshuman Khandual wrote:
During memory hotplug process, the linear mapping should
On Tue, Sep 29, 2020 at 01:34:24PM +0530, Anshuman Khandual wrote:
>
>
> On 09/29/2020 02:05 AM, Will Deacon wrote:
> > On Thu, Sep 17, 2020 at 02:16:42PM +0530, Anshuman Khandual wrote:
> >> During memory hotplug process, the linear mapping should not be created for
> >> a given memory range if
On 09/29/2020 02:05 AM, Will Deacon wrote:
> On Thu, Sep 17, 2020 at 02:16:42PM +0530, Anshuman Khandual wrote:
>> During memory hotplug process, the linear mapping should not be created for
>> a given memory range if that would fall outside the maximum allowed linear
>> range. Else it might cau
On Thu, Sep 17, 2020 at 02:16:42PM +0530, Anshuman Khandual wrote:
> During memory hotplug process, the linear mapping should not be created for
> a given memory range if that would fall outside the maximum allowed linear
> range. Else it might cause memory corruption in the kernel virtual space.
>
During memory hotplug process, the linear mapping should not be created for
a given memory range if that would fall outside the maximum allowed linear
range. Else it might cause memory corruption in the kernel virtual space.
Maximum linear mapping region is [PAGE_OFFSET..(PAGE_END -1)] accommodati
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