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FROMLIST: KVM: arm64: pkvm: Fix hyp_pool max order

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The EL2 page allocator in protected mode maintains a per-pool max order
value to optimize allocations when the memory region it covers is small.
However, the max order value is currently under-estimated whenever the
number of pages in the region is a power of two. Fix the estimation.

Signed-off-by: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20211208152300.2478542-2-qperret@google.com
Bug: 209580772
Change-Id: Ibb149a33cad785c777032a4d129004f619d88653
This commit is contained in:
Quentin Perret
2021-12-08 15:22:54 +00:00
parent bcf3fd91be
commit a2fffdffb7
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kvm/hyp/nvhe/page_alloc.c
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@@ -241,7 +241,7 @@ int hyp_pool_init(struct hyp_pool *pool, u64 pfn, unsigned int nr_pages,
int i;
hyp_spin_lock_init(&pool->lock);
pool->max_order = min(MAX_ORDER, get_order(nr_pages << PAGE_SHIFT));
pool->max_order = min(MAX_ORDER, get_order((nr_pages + 1) << PAGE_SHIFT));
for (i = 0; i < pool->max_order; i++)
INIT_LIST_HEAD(&pool->free_area[i]);
pool->range_start = phys;