From: Paolo Bonzini <pbonzini@redhat.com>
To: Xiao Guangrong <guangrong.xiao@linux.intel.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: stable@vger.kernel.org, Andy Lutomirski <luto@amacapital.net>
Subject: Re: [PATCH 1/2] KVM: MMU: fix ept=0/pte.u=0/pte.w=0/CR0.WP=0/CR4.SMEP=1/EFER.NX=0 combo
Date: Thu, 10 Mar 2016 11:01:26 +0100 [thread overview]
Message-ID: <56E145F6.6030000@redhat.com> (raw)
In-Reply-To: <56E12FF0.90202@linux.intel.com>
On 10/03/2016 09:27, Xiao Guangrong wrote:
> So it only hurts the box which has cpu_has_load_ia32_efer support otherwise
> NX is inherited from kernel (kernel always sets NX if CPU supports it),
> right?
Yes, but I think !cpu_has_load_ia32_efer && SMEP does not exist. On the
other hand it's really only when disabling ept, so it's a weird corner
case that only happens during testing.
Paolo
next prev parent reply other threads:[~2016-03-10 10:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-08 11:44 [PATCH 0/2] KVM: MMU: fix ept=0/pte.u=0/pte.w=0/CR0.WP=0/CR4.SMEP=1/EFER.NX=0 Paolo Bonzini
2016-03-08 11:44 ` [PATCH 1/2] KVM: MMU: fix ept=0/pte.u=0/pte.w=0/CR0.WP=0/CR4.SMEP=1/EFER.NX=0 combo Paolo Bonzini
2016-03-10 8:27 ` Xiao Guangrong
2016-03-10 10:01 ` Paolo Bonzini [this message]
2016-03-10 10:09 ` Paolo Bonzini
2016-03-10 12:14 ` Xiao Guangrong
2016-03-10 12:26 ` Paolo Bonzini
2016-03-10 8:46 ` Xiao Guangrong
2016-03-10 10:03 ` Paolo Bonzini
2016-03-08 11:44 ` [PATCH 2/2] KVM: MMU: fix reserved bit check for pte.u=0/pte.w=0/CR0.WP=0/CR4.SMEP=1/EFER.NX=0 Paolo Bonzini
2016-03-10 8:36 ` Xiao Guangrong
2016-03-10 10:02 ` Paolo Bonzini
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