(+ Committers)
Ping again... I have some upcoming patches that are blocked on this work...
Cheers,
On 29/05/2019 18:23, Julien Grall wrote:
> Hi,
>
> Gentle ping...
>
> Cheers,
>
> On 14/05/2019 13:31, Julien Grall wrote:
>> Hi all,
>>
>> This is the third part of the boot/memory rework for Xen on Arm. At the
>> moment, the update to Xen PT is scattered all around mm.c. This makes
>> difficult to rework Xen memory layout or even ensuring we are following the
>> Arm Arm properly (and we are not so far!).
>>
>> This part contains code to provide a generic function to update Xen PT.
>> While I could have started from scratch, I decided to base the new function
>> on create_xen_entries() (now renamed xen_pt_update()). This makes slightly
>> easier to follow the changes.
>>
>> In this series, the new generic function will only support 3rd-level update
>> and cannot be used in early boot (i.e because xenheap is not initialized).
>> This will be extended in follow-up series to allow more use within mm.c.
>>
>> There are probably some optimization possible around the TLBs flush. I haven't
>> looked at it so far.
>>
>> The last two patches of this series is to show how existing callers can be
>> converted. There are more conversion to come in follow-up series.
>>
>> This series is based on the first two parts sent separately (see [1] and [2]).
>>
>> For convenience, I provided a branch with all the patches applied based on
>> staging:
>>
>> git://xenbits.xen.org/people/julieng/xen-unstable.git branch mm/part3/v2
>>
>> Cheers,
>>
>> [1] https://lists.xenproject.org/archives/html/xen-devel/2019-05/msg01109.html
>> [2] https://lists.xenproject.org/archives/html/xen-devel/2019-05/msg01149.html
>>
>> Julien Grall (12):
>> xen/arm: lpae: Add a macro to generate offsets from an address
>> xen/arm: mm: Rename create_xen_entries() to xen_pt_update()
>> xen/arm: mm: Move out of xen_pt_update() the logic to update an entry
>> xen/arm: mm: Only increment mfn when valid in xen_pt_update
>> xen/arm: mm: Introduce _PAGE_PRESENT and _PAGE_POPULATE
>> xen/arm: mm: Sanity check any update of Xen page tables
>> xen/arm: mm: Rework xen_pt_update_entry to avoid use xenmap_operation
>> xen/arm: mm: Remove enum xenmap_operation
>> xen/arm: mm: Use {, un}map_domain_page() to map/unmap Xen page-tables
>> xen/arm: mm: Rework Xen page-tables walk during update
>> xen/arm: mm: Don't open-code Xen PT update in {set, clear}_fixmap()
>> xen/arm: mm: Remove set_pte_flags_on_range()
>>
>> xen/arch/arm/mm.c | 421 ++++++++++++++++++++++++++++++---------------
>> xen/arch/arm/p2m.c | 23 +--
>> xen/include/asm-arm/lpae.h | 9 +
>> xen/include/asm-arm/page.h | 9 +-
>> 4 files changed, 305 insertions(+), 157 deletions(-)
>>
>
--
Julien Grall
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