Hi Bupesh On 28/01/2019 20:57, Bhupesh Sharma wrote:
With ARMv8.2-LVA and LPA architecture extensions, arm64 hardware which supports these extensions can support upto 52-bit virtual and 52-bit physical addresses respectively. Since at the moment we enable the support of these extensions via CONFIG flags, e.g. - LPA via CONFIG_ARM64_PA_BITS_52, and - LVA via CONFIG_ARM64_FORCE_52BIT The easiest way a user can determine the physical/virtual addresses supported on the hardware, is via the '/proc/cpuinfo' interface.
Why do we need this information ? Btw, this keeps coming up all the time and the answer to this approach is always no. We cannot break the "unwritten" ABI of /proc/cpuinfo, again. See : https://patchwork.kernel.org/patch/8669301/ Suzuki _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
