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From: Maxim Levitsky <mlevitsk@redhat.com>
To: harry harry <hiharryharryharry@gmail.com>,
	kvm@vger.kernel.org, qemu-devel@nongnu.org
Cc: Sean Christopherson <sean.j.christopherson@intel.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	stefanha@redhat.com, mathieu.tarral@protonmail.com
Subject: Re: About two-dimensional page translation (e.g., Intel EPT) and shadow page table in Linux QEMU/KVM
Date: Mon, 12 Jul 2021 12:49:44 +0300	[thread overview]
Message-ID: <d79db3d7c443f392f5a8b3cf631e5607b72b6208.camel@redhat.com> (raw)
In-Reply-To: <CA+-xGqNUX4dpzFV7coJSoJnPz6cE5gdPy1kzRKsQtGD371hyEg@mail.gmail.com>

On Sun, 2021-07-11 at 15:13 -0500, harry harry wrote:
> Hi all,
> 
> I hope you are very well! May I know whether it is possible to enable
> two-dimensional page translation (e.g., Intel EPT) mechanisms and
> shadow page table mechanisms in Linux QEMU/KVM at the same time on a
> physical server? For example, if the physical server has 80 cores, is
> it possible to let 40 cores use Intel EPT mechanisms for page
> translation and the other 40 cores use shadow page table mechanisms?
> Thanks!

Nope sadly. EPT/NPT is enabled by a module param.

Best regards,
	Maxim Levitsky

> 
> Best,
> Harry
> 



WARNING: multiple messages have this Message-ID (diff)
From: Maxim Levitsky <mlevitsk@redhat.com>
To: harry harry <hiharryharryharry@gmail.com>,
	kvm@vger.kernel.org,  qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	mathieu.tarral@protonmail.com, stefanha@redhat.com,
	Sean Christopherson <sean.j.christopherson@intel.com>
Subject: Re: About two-dimensional page translation (e.g., Intel EPT) and shadow page table in Linux QEMU/KVM
Date: Mon, 12 Jul 2021 12:49:44 +0300	[thread overview]
Message-ID: <d79db3d7c443f392f5a8b3cf631e5607b72b6208.camel@redhat.com> (raw)
In-Reply-To: <CA+-xGqNUX4dpzFV7coJSoJnPz6cE5gdPy1kzRKsQtGD371hyEg@mail.gmail.com>

On Sun, 2021-07-11 at 15:13 -0500, harry harry wrote:
> Hi all,
> 
> I hope you are very well! May I know whether it is possible to enable
> two-dimensional page translation (e.g., Intel EPT) mechanisms and
> shadow page table mechanisms in Linux QEMU/KVM at the same time on a
> physical server? For example, if the physical server has 80 cores, is
> it possible to let 40 cores use Intel EPT mechanisms for page
> translation and the other 40 cores use shadow page table mechanisms?
> Thanks!

Nope sadly. EPT/NPT is enabled by a module param.

Best regards,
	Maxim Levitsky

> 
> Best,
> Harry
> 




  reply	other threads:[~2021-07-12  9:50 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-11 20:13 About two-dimensional page translation (e.g., Intel EPT) and shadow page table in Linux QEMU/KVM harry harry
2021-07-11 20:13 ` harry harry
2021-07-12  9:49 ` Maxim Levitsky [this message]
2021-07-12  9:49   ` Maxim Levitsky
2021-07-12 13:02   ` harry harry
2021-07-12 13:02     ` harry harry
2021-07-12 13:11     ` Maxim Levitsky
2021-07-12 13:11       ` Maxim Levitsky
2021-07-12 14:56       ` Sean Christopherson
2021-07-14  5:30         ` harry harry
2021-07-14  5:30           ` harry harry
2021-07-14 17:47           ` Sean Christopherson
2021-07-15  5:49             ` harry harry
2021-07-15  5:49               ` harry harry
2021-07-15 22:24               ` Sean Christopherson
2021-07-16  3:20                 ` harry harry
2021-07-16  3:20                   ` harry harry
2021-07-21 21:00                   ` Sean Christopherson
2021-07-28 19:00                     ` harry harry
2021-07-28 19:00                       ` harry harry
2021-07-28 20:01                       ` Sean Christopherson
2021-08-05 19:42                         ` harry harry
2021-08-05 19:42                           ` harry harry
2021-07-14  5:22       ` harry harry
2021-07-14  5:22         ` harry harry

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