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KVM: x86: Skip pae_root shadow allocation if tdp enabled

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Considering the fact that the pae_root shadow is not needed when
tdp is in use, skip the pae_root shadow page allocation to allow
mmu creation even not being able to obtain memory from DMA32
zone when particular cgroup cpuset.mems or mempolicy control is
applied.

Signed-off-by: Liang Chen <liangchen.linux@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Liang Chen 2018-07-25 16:32:14 +08:00 committed by Paolo Bonzini
parent c2a4eadf77
commit ee6268ba3a
1 changed files with 3 additions and 0 deletions
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3
arch/x86/kvm/mmu.c
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@ -5341,6 +5341,9 @@ static int alloc_mmu_pages(struct kvm_vcpu *vcpu)
struct page *page;
int i;
if (tdp_enabled)
return 0;
/*
* When emulating 32-bit mode, cr3 is only 32 bits even on x86_64.
* Therefore we need to allocate shadow page tables in the first