KVM: x86: Move nEPT exit_qualification field from kvm_vcpu_arch to x86_exception

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Move the exit_qualification field that is used to track information about
in-flight nEPT violations from "struct kvm_vcpu_arch" to "x86_exception",
i.e. associate the information with the actual nEPT violation instead of
the vCPU.  To handle bits that are pulled from vmcs.EXIT_QUALIFICATION,
i.e. that are propagated from the "original" EPT violation VM-Exit, simply
grab them from the VMCS on-demand when injecting a nEPT Violation or a PML
Full VM-exit.

Aside from being ugly, having an exit_qualification field in kvm_vcpu_arch
is outright dangerous, e.g. see commit d7f0a00e43 ("KVM: VMX: Report
up-to-date exit qualification to userspace").

Opportunstically add a comment to call out that PML Full and EPT Violation
VM-Exits use the same bit to report NMI blocking information.

Link: https://lore.kernel.org/r/20240209221700.393189-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Sean Christopherson 2024-02-09 14:16:59 -08:00

parent 0c47651403

commit a946607868

5 changed files with 20 additions and 14 deletions

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3

arch/x86/include/asm/kvm_host.h

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1

arch/x86/kvm/kvm_emulate.h

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14

arch/x86/kvm/mmu/paging_tmpl.h

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14

arch/x86/kvm/vmx/nested.c

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2

arch/x86/kvm/vmx/vmx.c

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