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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 1/12/26 3:04 PM, Andrew Morton wrote: > On Mon, 12 Jan 2026 14:22:59 -0600 "Pratik R. Sampat" wrote: > >> Confidential computing guests require memory to be accepted before use. >> The unaccepted memory bitmap maintained by firmware does not track >> hotplugged memory ranges. >> >> Call arch_accept_memory() during the hot-add path to explicitly validate >> and transition the newly added memory to a private state, making it >> usable by the guest. >> >> Signed-off-by: Pratik R. Sampat >> --- >> mm/memory_hotplug.c | 4 ++++ >> 1 file changed, 4 insertions(+) >> >> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c >> index a63ec679d861..8cfbf0541430 100644 >> --- a/mm/memory_hotplug.c >> +++ b/mm/memory_hotplug.c >> @@ -38,6 +38,7 @@ >> #include >> >> #include >> +#include > > This only exists for x86! Ah, I missed that entirely. Thanks for catching that. Probably not the best option to have a generic unaccepted_memory.h as well. Maybe, I should have arch_[un]accept_memory() definitions within mm.h wrapped within CONFIG_UNACCEPTED_MEMORY instead so that its cleaner. > > Otherwise, the mm/ changes are minimal so I volunteer this patchset > for the x86 tree ;) Ack! --Pratik