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    SubjectRe: [PATCH v7 1/8] KVM: VMX: Introduce PKS VMCS fields
    On Sun, Apr 24, 2022, Lei Wang wrote:
    > From: Chenyi Qiang <chenyi.qiang@intel.com>
    >
    > PKS(Protection Keys for Supervisor Pages) is a feature that extends the
    > Protection Key architecture to support thread-specific permission
    > restrictions on supervisor pages.
    >
    > A new PKS MSR(PKRS) is defined in kernel to support PKS, which holds a
    > set of permissions associated with each protection domain.
    >
    > Two VMCS fields {HOST,GUEST}_IA32_PKRS are introduced in
    > {host,guest}-state area to store the respective values of PKRS.
    >
    > Every VM exit saves PKRS into guest-state area.

    Uber nit, PKRS isn't saved if VMX doesn't support the entry control.

    Every VM exit saves PKRS into guest-state area if VM_ENTRY_LOAD_IA32_PKRS
    is supported by the CPU.

    With that tweak,

    Reviewed-by: Sean Christopherson <seanjc@google.com>

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