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

[Bob Picco]

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>

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>

bob
> 
> 
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