Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region

[Peter Maydell]

On 29 July 2015 at 11:03, Pavel Fedin <address@hidden> wrote:

>> Also in light of guests with huge memory size, 512Gb  gap for RAM seems too 
>> small,
>> what are limitations of ARM64 regarding max supported physical address bits?
>
>  40 bits IIRC.

In hardware, implemented maximum physical address size may be
anything from 32 bits to 48 bits in 4 bit steps. At least
40 and 48 bits have been implemented.

A 32-bit VM has a maximum physical address size of 40 bits;
a 64-bit VM has a maximum physical address size equal to the
host's maximum physical address size (unless KVM chooses to
constrain it further).

-- PMM