From: Wanpeng Li <wanpeng.li@linux.intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Gleb Natapov <gleb@kernel.org>,
Zhang Yang <yang.z.zhang@intel.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4] KVM: vmx: fix ept reserved bits for 1-GByte page
Date: Wed, 20 Aug 2014 16:38:34 +0800 [thread overview]
Message-ID: <20140820083833.GA27197@kernel> (raw)
In-Reply-To: <53F45893.6050305@redhat.com>
On Wed, Aug 20, 2014 at 10:13:07AM +0200, Paolo Bonzini wrote:
>Il 20/08/2014 09:31, Wanpeng Li ha scritto:
>> EPT misconfig handler in kvm will check which reason lead to EPT
>> misconfiguration after vmexit. One of the reasons is that an EPT
>> paging-structure entry is configured with settings reserved for
>> future functionality. However, the handler can't identify if
>> paging-structure entry of reserved bits for 1-GByte page are
>> configured, since PDPTE which point to 1-GByte page will reserve
>> bits 29:12 instead of bits 7:3 which are reserved for PDPTE that
>> references an EPT Page Directory. This patch fix it by reserve
>> bits 29:12 for 1-GByte page.
>
>Thanks, the patch looks good.
>
>Can you describe how you detected the problem and how you're testing for it?
>
I found the issue by reviewing codes.
Regards,
Wanpeng Li
>Paolo
prev parent reply other threads:[~2014-08-20 8:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-20 7:31 [PATCH v4] KVM: vmx: fix ept reserved bits for 1-GByte page Wanpeng Li
2014-08-20 8:13 ` Paolo Bonzini
2014-08-20 8:38 ` Wanpeng Li [this message]
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