From: Xiao Guangrong <guangrong.xiao@linux.intel.com>
To: Bandan Das <bsd@redhat.com>, kvm@vger.kernel.org
Cc: pbonzini@redhat.com
Subject: Re: [RFC PATCH 0/4] Add support for EPT execute only for nested hypervisors
Date: Wed, 22 Jun 2016 12:39:55 +0800 [thread overview]
Message-ID: <576A169B.5090608@linux.intel.com> (raw)
In-Reply-To: <1466478746-14153-1-git-send-email-bsd@redhat.com>
On 06/21/2016 11:12 AM, Bandan Das wrote:
> I spoke to Paolo about this a while back and thought to post this as
> RFC while I am thinking of adding some unit tests.
>
> Background: ESX refuses to run as L1 if support for EPT execute only isn't
> found. I am not really sure if it uses it for anything since just advertising
> the bits seems to work but adding the necessary plumbing seemed like a good idea.
>
> Xiao, I took the liberty of adding you based on "git blame" :)
Thank you, Bandan! I really hope all mmu related patches can be CCed to me
in case if i am too busy to watch patches in kvm mail list. :)
Some points are missed in this patchset:
1) You also need to tech is_present_gpte() about this fact.
2) update_permission_bitmask() need to be fixed as it always expects
that read-access is available (actually, read-access is equal with
user-access if ept is shadowed).
next prev parent reply other threads:[~2016-06-22 4:47 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-21 3:12 [RFC PATCH 0/4] Add support for EPT execute only for nested hypervisors Bandan Das
2016-06-21 3:12 ` [RFC PATCH 1/4] mmu: add a boolean to indicate host ept execute only support Bandan Das
2016-06-21 3:12 ` [RFC PATCH 2/4] mmu: Update ept specific valid bit values Bandan Das
2016-06-21 8:08 ` Paolo Bonzini
2016-06-22 4:09 ` Xiao Guangrong
2016-06-21 3:12 ` [RFC PATCH 3/4] mmu: don't set the present bit unconditionally Bandan Das
2016-06-21 8:12 ` Paolo Bonzini
2016-06-21 8:40 ` Paolo Bonzini
2016-06-22 16:10 ` Bandan Das
2016-06-22 16:12 ` Paolo Bonzini
2016-06-22 16:23 ` Bandan Das
2016-06-22 4:30 ` Xiao Guangrong
2016-06-22 16:21 ` Bandan Das
2016-06-21 3:12 ` [RFC PATCH 4/4] vmx: advertise support for ept execute only Bandan Das
2016-06-22 4:39 ` Xiao Guangrong [this message]
2016-06-22 16:34 ` [RFC PATCH 0/4] Add support for EPT execute only for nested hypervisors Bandan Das
2016-06-23 5:03 ` Xiao Guangrong
2016-06-24 2:56 ` Bandan Das
2016-06-24 4:22 ` Paolo Bonzini
2016-06-24 4:50 ` Bandan Das
2016-06-24 6:46 ` Paolo Bonzini
2016-06-24 7:02 ` Xiao Guangrong
2016-06-24 16:19 ` Bandan Das
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