kvmtool: ARM: pass MADV_HUGEPAGE to madvise

If the host kernel is configured with CONFIG_TRANSPARENT_HUGEPAGE_MADVISE,
it is important to madvise(MADV_HUGEPAGE) the memory region.
Otherwise, the guest won't benefit from using THP.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arm/kvm.c b/arm/kvm.c
index d0d64ff7..58ad9fa2 100644
--- a/arm/kvm.c
+++ b/arm/kvm.c
@@ -79,7 +79,7 @@ void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size)
 					SZ_2M);
 
 	madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size,
-		MADV_MERGEABLE);
+		MADV_MERGEABLE | MADV_HUGEPAGE);
 
 	/* Initialise the virtual GIC. */
 	if (gic__init_irqchip(kvm))