[PATCH 00/10] arm64: 52-bit physical address support

[Kristina Martsenko]

On 14/12/17 17:52, Bob Picco wrote:
> Kristina Martsenko wrote:	[Wed Dec 13 2017, 12:07:15PM EST]
>> Hi,
>>
>> This series adds 52-bit physical address space support to arm64, up from
>> the current 48 bits. This is an ARMv8.2 feature (ARMv8.2-LPA).
>>
>> The series is based on 4.15-rc3. It has been lightly tested on an ARM
>> Fast Model. There's still some cases and areas to think through, as well
>> as more testing to do.
>>
>> Patches for SMMU 52-bit PA support have been sent separately [1]. A GIC
>> ITS patch has already been merged [2]. ARMv8.2 also allows 52-bit IPA,
>> but support for that is not part of this series.
>>
>> This version mostly addresses various review comments received.
>>
>> Changes from RFC:
>>  - Split kconfig symbol into two patches, to enable 52-bit PA at the end
>>  - Patch #3: Changed phys_to_ttbr to use a macro, added an #include
>>  - Patch #4: Changed phys_to_pte to use a macro
>>  - Patch #6: Replaced __phys_to_pte with __phys_to_pte_val (same for
>>    pmd/pud/pgd)
>>  - Patch #6: Changed __phys_to_pte_val, __pte_to_phys, and
>>    pgtable-hwdef.h macros
>>  - Patches #5, #6: Removed kvm_extended_idmap_pgd, inlined its code,
>>    moved the comment
>>  - Patch #5: Added pfn_pud definition (to make the kernel build on that
>>    commit)
>>
>> Thanks,
>> Kristina
>>
>> [1] https://www.spinics.net/lists/arm-kernel/msg619040.html
>> [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=30ae9610d275f8f03f5bf7612ce71d8af6fc400b
>>
>>
>> Kristina Martsenko (10):
>>   arm64: add kconfig symbol to configure physical address size
>>   arm64: limit PA size to supported range
>>   arm64: handle 52-bit addresses in TTBR
>>   arm64: head.S: handle 52-bit PAs in PTEs in early page table setup
>>   arm64: don't open code page table entry creation
>>   arm64: handle 52-bit physical addresses in page table entries
>>   arm64: increase PHYS_MASK to 52 bits
>>   arm64: increase sparsemem MAX_PHYSMEM_BITS to 52
>>   arm64: allow ID map to be extended to 52 bits
>>   arm64: enable 52-bit physical address support
>>
>>  arch/arm/include/asm/kvm_mmu.h         |   7 ++
>>  arch/arm64/Kconfig                     |  29 ++++++++
>>  arch/arm64/include/asm/assembler.h     |  31 ++++++++-
>>  arch/arm64/include/asm/kvm_mmu.h       |  21 +++++-
>>  arch/arm64/include/asm/mmu_context.h   |  16 ++++-
>>  arch/arm64/include/asm/pgalloc.h       |   6 +-
>>  arch/arm64/include/asm/pgtable-hwdef.h |  19 +++++-
>>  arch/arm64/include/asm/pgtable.h       |  53 ++++++++++++---
>>  arch/arm64/include/asm/sparsemem.h     |   2 +-
>>  arch/arm64/include/asm/sysreg.h        |   8 +++
>>  arch/arm64/kernel/head.S               | 118 +++++++++++++++++++++------------
>>  arch/arm64/kernel/hibernate-asm.S      |  12 ++--
>>  arch/arm64/kernel/hibernate.c          |   5 +-
>>  arch/arm64/kvm/hyp-init.S              |  26 ++++----
>>  arch/arm64/kvm/hyp/s2-setup.c          |   2 +
>>  arch/arm64/mm/mmu.c                    |  15 +++--
>>  arch/arm64/mm/pgd.c                    |   8 +++
>>  arch/arm64/mm/proc.S                   |  19 +++---
>>  virt/kvm/arm/arm.c                     |   2 +-
>>  virt/kvm/arm/mmu.c                     |  12 ++--
>>  20 files changed, 302 insertions(+), 109 deletions(-)
>>
>> -- 
>> 2.1.4
> Hi Kristina,
> 
> I boot tested but on VM and had a couple issues. I will examine and share
> should the issues be of value.
> Tested-by: Bob Picco <bob.picco at oracle.com>

Thanks for testing! I assume it was on a VM with less than 52 bits of
PA? In any case, let me know if you find any issues.

> I reviewed and thank you. Your effort caused me to return to some code
> examined/learned during the last few months.
> Reviewed-by: Bob Picco <bob.picco at oracle.com>

Thanks for reviewing! Hope it was useful.

Kristina