Re: [PATCH V2] powerpc/mm: Add validation for platform reserved memory ranges

On Mon, 2016-04-11 at 11:43 +0530, Anshuman Khandual wrote:

On 03/07/2016 03:25 PM, Anshuman Khandual wrote:

quoted

For partition running on PHYP, there can be a adjunct partition
which shares the virtual address range with the operating system.
Virtual address ranges which can be used by the adjunct partition
are communicated with virtual device node of the device tree with
a property known as "ibm,reserved-virtual-addresses". This patch
introduces a new function named 'validate_reserved_va_range' which
is called  during initialization to validate that these reserved
virtual address ranges do not overlap with the address ranges used
by the kernel for all supported memory contexts. This helps prevent
the possibility of getting return codes similar to H_RESOURCE for
H_PROTECT hcalls for conflicting HPTE entries.

Signed-off-by: Anshuman Khandual <redacted>
---
- Tested on both POWER8 LE and BE platforms

Changes in V2:
- Added braces to the definition of LINUX_VA_BITS
- Adjusted tabs as spaces for the definition of PARTIAL_LINUX_VA_MASK

mpe, any updates on this ?

I'm just starting to look at things for next. So will try and get to it this
week.

cheers