linux-kernel - Re: [PATCH v4 2/5] KVM: X86: Expose PKS to guest

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Message-ID: <89c82d11-8206-1ad9-9dfd-666d34685109@redhat.com>
Date:   Fri, 5 Feb 2021 10:23:44 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Chenyi Qiang <chenyi.qiang@...el.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Xiaoyao Li <xiaoyao.li@...el.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/5] KVM: X86: Expose PKS to guest

On 05/02/21 09:37, Chenyi Qiang wrote:

> +	/*
> +	 * PKS is not yet implemented for shadow paging.
> +	 * If not support VM_{ENTRY, EXIT}_LOAD_IA32_PKRS,
> +	 * don't expose the PKS as well.
> +	 */
> +	if (enable_ept && cpu_has_load_ia32_pkrs())
> +		kvm_cpu_cap_check_and_set(X86_FEATURE_PKS);

This piece should be a separate patch, added after patch 4.

Paolo