linux-kernel - Re: [PATCH 1/5] mmu: mark spte present if the x bit is set

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Message-ID: <CANRm+CxaVAs+ymwBCm0K3Gow0W2QOSvhnSFvWBTmCp2Gkcn9aw@mail.gmail.com>
Date:	Tue, 5 Jul 2016 11:06:47 +0800
From:	Wanpeng Li <kernellwp@...il.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Bandan Das <bsd@...hat.com>, kvm <kvm@...r.kernel.org>,
	guangrong.xiao@...ux.intel.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/5] mmu: mark spte present if the x bit is set

2016-06-29 4:49 GMT+08:00 Paolo Bonzini <pbonzini@...hat.com>:
[...]
>
> I think another way to write it is "(pte & 0xFFFFFFFFull) &&
> !is_mmio_spte(pte)", since non-present/non-MMIO SPTEs never use bits

I misunderstand it here, this will also treat -W- EPT SPTEs as present, right?

Regards,
Wanpeng Li