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KVM: x86/mmu: Drop KVM's hugepage enums in favor of the kernel's enums

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Replace KVM's PT_PAGE_TABLE_LEVEL, PT_DIRECTORY_LEVEL and PT_PDPE_LEVEL
with the kernel's PG_LEVEL_4K, PG_LEVEL_2M and PG_LEVEL_1G.  KVM's
enums are borderline impossible to remember and result in code that is
visually difficult to audit, e.g.

        if (!enable_ept)
                ept_lpage_level = 0;
        else if (cpu_has_vmx_ept_1g_page())
                ept_lpage_level = PT_PDPE_LEVEL;
        else if (cpu_has_vmx_ept_2m_page())
                ept_lpage_level = PT_DIRECTORY_LEVEL;
        else
                ept_lpage_level = PT_PAGE_TABLE_LEVEL;

versus

        if (!enable_ept)
                ept_lpage_level = 0;
        else if (cpu_has_vmx_ept_1g_page())
                ept_lpage_level = PG_LEVEL_1G;
        else if (cpu_has_vmx_ept_2m_page())
                ept_lpage_level = PG_LEVEL_2M;
        else
                ept_lpage_level = PG_LEVEL_4K;

No functional change intended.

Suggested-by: Barret Rhoden <brho@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200428005422.4235-4-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson
2020-04-27 17:54:22 -07:00
committed by Paolo Bonzini
parent e662ec3e07
commit 3bae0459bc
8 changed files with 73 additions and 86 deletions
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2
arch/x86/kvm/svm/svm.c
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@@ -888,7 +888,7 @@ static __init int svm_hardware_setup(void)
if (npt_enabled && !npt)
npt_enabled = false;
kvm_configure_mmu(npt_enabled, PT_PDPE_LEVEL);
kvm_configure_mmu(npt_enabled, PG_LEVEL_1G);
pr_info("kvm: Nested Paging %sabled\n", npt_enabled ? "en" : "dis");
if (nrips) {