KVM: x86/mmu: Use MMU role_regs to get LA57, and drop vCPU LA57 helper

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Get LA57 from the role_regs, which are initialized from the vCPU even
though TDP is enabled, instead of pulling the value directly from the
vCPU when computing the guest's root_level for TDP MMUs.  Note, the check
is inside an is_long_mode() statement, so that requirement is not lost.

Use role_regs even though the MMU's role is available and arguably
"better".  A future commit will consolidate the guest root level logic,
and it needs access to EFER.LMA, which is not tracked in the role (it
can't be toggled on VM-Exit, unlike LA57).

Drop is_la57_mode() as there are no remaining users, and to discourage
pulling MMU state from the vCPU (in the future).

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622175739.3610207-41-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Sean Christopherson 2021-06-22 10:57:25 -07:00 • committed by Paolo Bonzini

parent 5472fcd4c6

commit 87e99d7d70

2 changed files with 1 additions and 11 deletions

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arch/x86/kvm/mmu/mmu.c

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10

arch/x86/kvm/x86.h

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