On Thu, Dec 08, 2022 at 04:37:03PM +0800, Xiaoyao Li wrote:

On 12/2/2022 2:13 PM, Chao Peng wrote:

..

quoted

Together with the change, a new config HAVE_KVM_RESTRICTED_MEM is added
and right now it is selected on X86_64 only.

From the patch implementation, I have no idea why HAVE_KVM_RESTRICTED_MEM is
needed.

The reason is we want KVM further controls the feature enabling. An
opt-in CONFIG_RESTRICTEDMEM can cause problem if user sets that for
unsupported architectures.

Here is the original discussion:
https://lore.kernel.org/all/YkJLFu98hZOvTSrL@google.com/ (local)

Thanks,
Chao