Re: [PATCH v2 1/5] mmu: extend the is_present check to 32 bits

From	Paolo Bonzini <pbonzini@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 1/5] mmu: extend the is_present check to 32 bits
Date	2016-09-01 17:20 +0200
Message-ID	<scBWy-3yb-41@gated-at.bofh.it> (permalink)
References	<rUec2-2Bd-9@gated-at.bofh.it> <rUec2-2Bd-7@gated-at.bofh.it> <scBa9-304-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 01/09/2016 16:20, Li, Liang Z wrote:
> Intel SDM doesn't describe whether the A bit will be set or not when
> CPU accesses  a no present EPT page table entry

Bits in a non-present page table entry are entirely for use by the OS.
The processor will never touch it.  This includes both P=0 in non-EPT
page tables and XWR=000 in EPT page tables.

Paolo

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RE: [PATCH v2 1/5] mmu: extend the is_present check to 32 bits "Li, Liang Z" <liang.z.li@intel.com> - 2016-09-01 16:30 +0200
  Re: [PATCH v2 1/5] mmu: extend the is_present check to 32 bits Paolo Bonzini <pbonzini@redhat.com> - 2016-09-01 17:20 +0200

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