[PATCH v4 00/21] KVM: arm64: Rewrite page-table code and fault handling

[Gavin Shan]

Hi Will and Marc,

On 9/8/20 1:23 AM, Will Deacon wrote:
> Hi all,
> 
> Here's version four of the KVM page-table rework I previously posted here:
> 
>    v1: https://lore.kernel.org/r/20200730153406.25136-1-will@kernel.org
>    v2: https://lore.kernel.org/r/20200818132818.16065-1-will@kernel.org
>    v3: https://lore.kernel.org/r/20200825093953.26493-1-will@kernel.org
> 
> Changes since v3 include:
> 
>    * Removed some more unused code from the old implementation
>    * Renumbered KVM_PGTABLE_PROT_* to match file permissions in hex dumps
>    * Simplified kvm_granule_shift() and removed kvm_start_level()
>    * Only clear valid bit when invalidating a PTE, leaving phys addr intact
>    * Fail gracefully when attempting to allocate without a memory cache
>    * Rewrote stage2_apply_range() as a function instead of a macro
>    * Fixed fault address rounding with hugetlbfs
>    * Fixed permission fault handling when dirty logging is enabled
>    * Added comments
>    * Added reviewer tags
> 
> Many thanks to Alex and Gavin for their comments.
> 
> Will
> 

[...]

Eventually, I'm lucky finding a machine from our pool where 16KB page
size is supported. I tried this series (v4) on this machine, everything
looks good as we expected:

    Host:   5.9.0-rc3 + patchset (v4)
            CONFIG_ARM64_VA_BITS=47
            CONFIG_ARM64_PAGE_SHIFT=14
            Hugepagesize: 32768 kB      (from /proc/meminfo)
    Config: -HugeTLBfs/-THP
            +HugeTLBfs/-THP
            -HugeTLBfs/THP
    Guest:  CONFIG_ARM64_PAGE_SHIFT=12/14/16

Let me know in case there are more tests needed from my side.

Thanks,
Gavin