26 Apr
2013
26 Apr
'13
3:18 p.m.
On 26 April 2013 14:14, Andre Przywara andre.przywara@linaro.org wrote:
ARM CPUs with the virtualization extension have a new mode called HYP mode, which allows hypervisors to safely control and monitor guests. The current hypervisor (KVM and Xen) implementations require the kernel to be entered in that HYP mode.
This patch series introduces a new U-Boot command called "hypmode" which can be used at any time at the U-Boot command prompt to switch the CPU into HYP mode - ideally this would be done before starting the kernel.
The obvious question here is "why do we need a new command?". The kernel booting specification says "boot the kernel in Hyp mode" so we should just always do that for booting Linux, surely?
thanks -- PMM