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KVM: x86/mmu: Refactor shadow walk in __direct_map() to reduce indentation

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Employ a 'continue' to reduce the indentation for linking a new shadow
page during __direct_map() in preparation for linking private pages.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <702419686d5700373123f6ea84e7a946c2cad8b4.1625186503.git.isaku.yamahata@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-07-02 15:04:50 -07:00 committed by Paolo Bonzini
parent e489a4a6bd
commit 03fffc5493
1 changed files with 9 additions and 8 deletions
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17
arch/x86/kvm/mmu/mmu.c
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@ -2939,15 +2939,16 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
break;
drop_large_spte(vcpu, it.sptep);
if (!is_shadow_present_pte(*it.sptep)) {
sp = kvm_mmu_get_page(vcpu, base_gfn, it.addr,
it.level - 1, true, ACC_ALL);
if (is_shadow_present_pte(*it.sptep))
continue;
link_shadow_page(vcpu, it.sptep, sp);
if (is_tdp && huge_page_disallowed &&
req_level >= it.level)
account_huge_nx_page(vcpu->kvm, sp);
}
sp = kvm_mmu_get_page(vcpu, base_gfn, it.addr,
it.level - 1, true, ACC_ALL);
link_shadow_page(vcpu, it.sptep, sp);
if (is_tdp && huge_page_disallowed &&
req_level >= it.level)
account_huge_nx_page(vcpu->kvm, sp);
}
ret = mmu_set_spte(vcpu, it.sptep, ACC_ALL,