Searched hist:"72 a5bc0f" (Results 1 – 1 of 1) sorted by relevance
/openbmc/linux/arch/arm64/kvm/hyp/nvhe/ |
H A D | page_alloc.c | 72a5bc0f Thu Nov 10 13:02:35 CST 2022 Quentin Perret <qperret@google.com> KVM: arm64: Allow attaching of non-coalescable pages to a hyp pool
All the contiguous pages used to initialize a 'struct hyp_pool' are considered coalescable, which means that the hyp page allocator will actively try to merge them with their buddies on the hyp_put_page() path. However, using hyp_put_page() on a page that is not part of the inital memory range given to a hyp_pool() is currently unsupported.
In order to allow dynamically extending hyp pools at run-time, add a check to __hyp_attach_page() to allow inserting 'external' pages into the free-list of order 0. This will be necessary to allow lazy donation of pages from the host to the hypervisor when allocating guest stage-2 page-table pages at EL2.
Tested-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20221110190259.26861-3-will@kernel.org
|