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KVM: x86/mmu: fix determination of max NPT mapping level for private pages

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The `if (req_max_level)` test was meant ignore req_max_level if
PG_LEVEL_NONE was returned. Hence, this function should return
max_level instead of the ignored req_max_level.

This is only a latent issue for now, since guest_memfd does not
support large pages.

Signed-off-by: Ackerley Tng <ackerleytng@google.com>
Message-ID: <20240801173955.1975034-1-ackerleytng@google.com>
Fixes: f32fb32820b1 ("KVM: x86: Add hook for determining max NPT mapping level")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ackerley Tng 2024-08-01 17:39:55 +00:00 committed by Paolo Bonzini
parent 66a644c09f
commit aca0ec970d
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/mmu/mmu.c
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@ -4335,7 +4335,7 @@ static u8 kvm_max_private_mapping_level(struct kvm *kvm, kvm_pfn_t pfn,
if (req_max_level)
max_level = min(max_level, req_max_level);
return req_max_level;
return max_level;
}
static int kvm_faultin_pfn_private(struct kvm_vcpu *vcpu,