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KVM: x86/mmu: WARN if root_hpa is invalid when handling a page fault

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WARN if root_hpa is invalid when handling a page fault.  The check on
root_hpa exists for historical reasons that no longer apply to the
current KVM code base.

Remove an equivalent debug-only warning in direct_page_fault(), whose
existence more or less confirms that root_hpa should always be valid
when handling a page fault.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2019-12-06 15:57:29 -08:00 committed by Paolo Bonzini
parent 0c7a98e34d
commit 6948199a9a
1 changed files with 1 additions and 3 deletions
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4
arch/x86/kvm/mmu/mmu.c
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@ -4172,8 +4172,6 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
kvm_pfn_t pfn;
int level, r;
MMU_WARN_ON(!VALID_PAGE(vcpu->arch.mmu->root_hpa));
if (page_fault_handle_page_track(vcpu, error_code, gfn))
return RET_PF_EMULATE;
@ -5463,7 +5461,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
int r, emulation_type = 0;
bool direct = vcpu->arch.mmu->direct_map;
if (!VALID_PAGE(vcpu->arch.mmu->root_hpa))
if (WARN_ON(!VALID_PAGE(vcpu->arch.mmu->root_hpa)))
return RET_PF_RETRY;
/* With shadow page tables, fault_address contains a GVA or nGPA. */