On 6 March 2015 at 17:00, Mark Rutland <mark.rutl...@arm.com> wrote: >> > Page size: >> > - 64/4K? (AArch64 Fedora/Red Hat kernels will differ: 4K for Fedora >> > for now, 64K for RH, there are a few issues with 64K left for triage) >> >> Fedora is 64K pages on aarch64, not 4K as noted. It's needed for AMD >> Seattle support. > > You can use 4K pages with Seattle, you just have to use 4-level (48-bit > VA) tables in order for the idmap to be able to address the physical > memory. > > Ard Biesheuvel has some patches [1,2] which will allow the idmap to use > 4 levels while keeping the rest of the tables as 3-level, which should > alleviate any performance impact 4-level tables could have. > > Hopefully those will be upstream shortly. >
FYI these patches have been pulled into v4.1-rc1, so no special provisions to allow booting on AMD Seattle are required anymore. Regards, Ard. _______________________________________________ cross-distro mailing list cross-distro@lists.linaro.org https://lists.linaro.org/mailman/listinfo/cross-distro
