KVM: x86/mmu: split cpu_role from mmu_role

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Snapshot the state of the processor registers that govern page walk into
a new field of struct kvm_mmu.  This is a more natural representation
than having it *mostly* in mmu_role but not exclusively; the delta
right now is represented in other fields, such as root_level.

The nested MMU now has only the CPU role; and in fact the new function
kvm_calc_cpu_role is analogous to the previous kvm_calc_nested_mmu_role,
except that it has role.base.direct equal to !CR0.PG.  For a walk-only
MMU, "direct" has no meaning, but we set it to !CR0.PG so that
role.ext.cr0_pg can go away in a future patch.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Paolo Bonzini 2022-02-11 06:50:11 -05:00

parent b89805082a

commit e5ed0fb010

3 changed files with 70 additions and 42 deletions

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1

arch/x86/include/asm/kvm_host.h

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109

arch/x86/kvm/mmu/mmu.c

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2

arch/x86/kvm/mmu/paging_tmpl.h

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