From: Paolo Bonzini <pbonzini@redhat.com>
To: Huaitong Han <huaitong.han@intel.com>, gleb@kernel.org
Cc: kvm@vger.kernel.org, guangrong.xiao@linux.intel.com
Subject: Re: [PATCH V5 8/9] KVM, pkeys: disable PKU feature without ept
Date: Mon, 21 Mar 2016 12:01:54 +0100 [thread overview]
Message-ID: <56EFD4A2.7000802@redhat.com> (raw)
In-Reply-To: <1458554760-4374-9-git-send-email-huaitong.han@intel.com>
On 21/03/2016 11:05, Huaitong Han wrote:
> This patch disables CPUID:PKU without ept, because pkeys is not yet
> implemented for shadow paging.
>
> Signed-off-by: Huaitong Han <huaitong.han@intel.com>
> Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
> ---
> arch/x86/kvm/cpuid.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index 7dc7a5a..5028c1e 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -447,6 +447,12 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
> entry->ebx |= F(TSC_ADJUST);
> entry->ecx &= kvm_supported_word11_x86_features;
> cpuid_mask(&entry->ecx, CPUID_7_ECX);
> + if (!tdp_enabled)
> + /*
> + * PKU is not yet implemented for shadow
> + * paging.
> + */
> + entry->ecx &= ~F(PKU);
> } else {
> entry->ebx = 0;
> entry->ecx = 0;
>
I'll squash this into the previous patch.
Paolo
next prev parent reply other threads:[~2016-03-21 11:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 10:05 [PATCH V5 0/9] KVM, pkeys: add memory protection-key support Huaitong Han
2016-03-21 10:05 ` [PATCH V5 1/9] KVM, pkeys: disable pkeys for guests in non-paging mode Huaitong Han
2016-03-21 10:05 ` [PATCH V5 2/9] KVM, pkeys: add pkeys support for xsave state Huaitong Han
2016-03-21 10:05 ` [PATCH V5 3/9] x86: pkey: introduce write_pkru() for KVM Huaitong Han
2016-03-21 10:05 ` [PATCH V5 4/9] KVM, pkeys: save/restore PKRU when guest/host switches Huaitong Han
2016-03-21 10:28 ` Paolo Bonzini
2016-03-21 10:37 ` Han, Huaitong
2016-03-21 10:05 ` [PATCH V5 5/9] KVM, pkeys: introduce pkru_mask to cache conditions Huaitong Han
2016-03-21 17:43 ` Paolo Bonzini
2016-03-21 10:05 ` [PATCH V5 6/9] KVM, pkeys: add pkeys support for permission_fault logic Huaitong Han
2016-03-21 10:55 ` Paolo Bonzini
2016-03-21 12:41 ` Han, Huaitong
2016-03-21 10:05 ` [PATCH V5 7/9] KVM, pkeys: expose CPUID/CR4 to guest Huaitong Han
2016-03-21 11:36 ` Paolo Bonzini
2016-03-21 11:56 ` Han, Huaitong
2016-03-21 12:08 ` Paolo Bonzini
2016-03-21 10:05 ` [PATCH V5 8/9] KVM, pkeys: disable PKU feature without ept Huaitong Han
2016-03-21 11:01 ` Paolo Bonzini [this message]
2016-03-21 10:06 ` [PATCH V5 9/9] Revert "KVM: MMU: precompute page fault error code" Huaitong Han
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