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 7/8] KVM: VMX: Expose PKS to guest
Date: Tue, 24 May 2022 23:34:22 +0000 [thread overview]
Message-ID: <Yo1rfrnV5nObIHJK@google.com> (raw)
In-Reply-To: <20220424101557.134102-8-lei4.wang@intel.com>
On Sun, Apr 24, 2022, Lei Wang wrote:
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 9d0588e85410..cbcb0d7b47a4 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -3250,7 +3250,7 @@ void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
> }
>
> /*
> - * SMEP/SMAP/PKU is disabled if CPU is in non-paging mode in
> + * SMEP/SMAP/PKU/PKS is disabled if CPU is in non-paging mode in
> * hardware. To emulate this behavior, SMEP/SMAP/PKU needs
Heh, missed one ;-) Let's reduce future pain and reword this whole comment:
/*
* SMEP/SMAP/PKU/PKS are effectively disabled if the CPU is in
* non-paging mode in hardware. To emulate this behavior,
* clear them in the hardware CR4 when the guest switches to
* non-paging mode and unrestricted guest is disabled, as KVM
* must run the guest with hardware CR0.PG=1.
*/
> * to be manually disabled when guest switches to non-paging
> * mode.
next prev parent reply other threads:[~2022-05-24 23:34 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
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 [this message]
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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