KVM: nVMX: Free only guest_mode (L2) roots on INVVPID w/o EPT

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When emulating INVVPID for L1, free only L2+ roots, using the guest_mode
tag in the MMU role to identify L2+ roots.  From L1's perspective, its
own TLB entries use VPID=0, and INVVPID is not requied to invalidate such
entries.  Per Intel's SDM, INVVPID _may_ invalidate entries with VPID=0,
but it is not required to do so.

Cc: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210609234235.1244004-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Sean Christopherson 2021-06-09 16:42:29 -07:00 • committed by Paolo Bonzini

parent 50a417962a

commit 25b62c6274

3 changed files with 31 additions and 4 deletions

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1

arch/x86/include/asm/kvm_host.h

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27

arch/x86/kvm/mmu/mmu.c

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7

arch/x86/kvm/vmx/nested.c

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