From: Sean Christopherson <seanjc@google.com>
To: Lei Wang <lei4.wang@intel.com>
Cc: pbonzini@redhat.com, vkuznets@redhat.com, wanpengli@tencent.com,
jmattson@google.com, joro@8bytes.org, chenyi.qiang@intel.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 1/8] KVM: VMX: Introduce PKS VMCS fields
Date: Tue, 24 May 2022 20:55:55 +0000 [thread overview]
Message-ID: <Yo1GW/7OuRooi3nT@google.com> (raw)
In-Reply-To: <20220424101557.134102-2-lei4.wang@intel.com>
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>
next prev parent reply other threads:[~2022-05-24 20:56 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-24 10:15 [PATCH v7 0/8] KVM: PKS Virtualization support Lei Wang
2022-04-24 10:15 ` [PATCH v7 1/8] KVM: VMX: Introduce PKS VMCS fields Lei Wang
2022-05-24 20:55 ` Sean Christopherson [this message]
2022-05-27 1:55 ` Wang, Lei
2022-04-24 10:15 ` [PATCH v7 2/8] KVM: VMX: Add proper cache tracking for PKRS Lei Wang
2022-05-24 21:00 ` Sean Christopherson
2022-05-27 2:16 ` Wang, Lei
2022-04-24 10:15 ` [PATCH v7 3/8] KVM: X86: Expose IA32_PKRS MSR Lei Wang
2022-05-24 22:11 ` Sean Christopherson
2022-05-27 9:21 ` Wang, Lei
2022-04-24 10:15 ` [PATCH v7 4/8] KVM: MMU: Rename the pkru to pkr Lei Wang
2022-04-24 10:15 ` [PATCH v7 5/8] KVM: MMU: Add helper function to get pkr bits Lei Wang
2022-05-24 23:21 ` Sean Christopherson
2022-05-27 9:28 ` Wang, Lei
2022-04-24 10:15 ` [PATCH v7 6/8] KVM: MMU: Add support for PKS emulation Lei Wang
2022-05-24 23:28 ` Sean Christopherson
2022-05-27 9:40 ` Wang, Lei
2022-04-24 10:15 ` [PATCH v7 7/8] KVM: VMX: Expose PKS to guest Lei Wang
2022-05-24 23:34 ` Sean Christopherson
2022-05-27 9:42 ` Wang, Lei
2022-04-24 10:15 ` [PATCH v7 8/8] KVM: VMX: Enable PKS for nested VM Lei Wang
2022-05-20 1:24 ` Sean Christopherson
2022-05-27 9:55 ` Wang, Lei
2022-05-06 7:32 ` [PATCH v7 0/8] KVM: PKS Virtualization support Wang, Lei
2025-11-10 16:29 ` The current status of PKS virtualization Ruihan Li
2025-11-10 20:44 ` Paolo Bonzini
2025-11-11 1:14 ` Ruihan Li
2025-11-11 5:40 ` Chenyi Qiang
2025-11-11 14:24 ` Ruihan Li
2025-11-12 1:06 ` Chenyi Qiang
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