Messages in this thread | | | Date | Tue, 24 May 2022 20:55:55 +0000 | From | Sean Christopherson <> | Subject | Re: [PATCH v7 1/8] KVM: VMX: Introduce PKS VMCS fields |
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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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