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From: Paolo Bonzini <pbonzini@redhat.com>
To: "Paraschiv, Andra-Irina" <andraprs@amazon.com>,
	Alexander Graf <graf@amazon.com>,
	linux-kernel@vger.kernel.org
Cc: Anthony Liguori <aliguori@amazon.com>,
	Benjamin Herrenschmidt <benh@amazon.com>,
	Colm MacCarthaigh <colmmacc@amazon.com>,
	Bjoern Doebel <doebel@amazon.de>,
	David Woodhouse <dwmw@amazon.co.uk>,
	Frank van der Linden <fllinden@amazon.com>,
	Martin Pohlack <mpohlack@amazon.de>, Matt Wilson <msw@amazon.com>,
	Balbir Singh <sblbir@amazon.com>,
	Stewart Smith <trawets@amazon.com>,
	Uwe Dannowski <uwed@amazon.de>,
	kvm@vger.kernel.org, ne-devel-upstream@amazon.com
Subject: Re: [PATCH v1 00/15] Add support for Nitro Enclaves
Date: Mon, 27 Apr 2020 11:46:57 +0200
Message-ID: <617eb49c-0ad9-8cf4-54bc-6d2cdfbb189a@redhat.com> (raw)
In-Reply-To: <fe8940ff-9deb-1b2b-8f30-2ecfe26ce27b@amazon.com>

On 27/04/20 11:22, Paraschiv, Andra-Irina wrote:
>>
>>
>> 1) having the kernel and initrd loaded by the parent VM in enclave
>> memory has the advantage that you save memory outside the enclave memory
>> for something that is only needed inside the enclave
> 
> Here you wanted to say disadvantage? :)Wrt saving memory, it's about
> additional memory from the parent / primary VM needed for handling the
> enclave image sections (such as the kernel, ramdisk) and setting the EIF
> at a certain offset in enclave memory?

No, it's an advantage.  If the parent VM can load everything in enclave
memory, it can read() into it directly.  It doesn't to waste its own
memory for a kernel and initrd, whose only reason to exist is to be
copied into enclave memory.

Paolo


  reply index

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-21 18:41 Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 01/15] nitro_enclaves: Add ioctl interface definition Andra Paraschiv
2020-04-21 18:47   ` Randy Dunlap
2020-04-21 21:45     ` Paolo Bonzini
2020-04-22 15:49       ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 02/15] nitro_enclaves: Define the PCI device interface Andra Paraschiv
2020-04-21 21:22   ` Paolo Bonzini
2020-04-23 13:37     ` Paraschiv, Andra-Irina
2020-04-24 15:10       ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 03/15] nitro_enclaves: Define enclave info for internal bookkeeping Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 04/15] nitro_enclaves: Init PCI device driver Andra Paraschiv
2020-04-25 14:25   ` Liran Alon
2020-04-29 16:31     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 05/15] nitro_enclaves: Handle PCI device command requests Andra Paraschiv
2020-04-25 14:52   ` Liran Alon
2020-04-29 17:00     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 06/15] nitro_enclaves: Handle out-of-band PCI device events Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 07/15] nitro_enclaves: Init misc device providing the ioctl interface Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 08/15] nitro_enclaves: Add logic for enclave vm creation Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 09/15] nitro_enclaves: Add logic for enclave vcpu creation Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 10/15] nitro_enclaves: Add logic for enclave memory region set Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 11/15] nitro_enclaves: Add logic for enclave start Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 12/15] nitro_enclaves: Add logic for enclave termination Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 13/15] nitro_enclaves: Add Kconfig for the Nitro Enclaves driver Andra Paraschiv
2020-04-21 18:50   ` Randy Dunlap
2020-04-22 14:35     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 14/15] nitro_enclaves: Add Makefile " Andra Paraschiv
2020-04-23  8:12   ` kbuild test robot
2020-04-24 17:00     ` Paraschiv, Andra-Irina
2020-04-23  8:43   ` kbuild test robot
2020-04-24 15:27     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 15/15] MAINTAINERS: Add entry " Andra Paraschiv
2020-04-21 21:46 ` [PATCH v1 00/15] Add support for Nitro Enclaves Paolo Bonzini
2020-04-23 13:19   ` Paraschiv, Andra-Irina
2020-04-23 13:42     ` Paolo Bonzini
2020-04-23 17:42       ` Paraschiv, Andra-Irina
2020-04-23 17:51         ` Paolo Bonzini
2020-04-23 20:56           ` Alexander Graf
2020-04-23 21:18             ` Paolo Bonzini
2020-04-24 12:56               ` Alexander Graf
2020-04-24 16:27                 ` Paolo Bonzini
2020-04-24 19:11                   ` Alexander Graf
2020-04-25 16:05                     ` Paolo Bonzini
2020-04-27  9:15                       ` Paraschiv, Andra-Irina
2020-04-27  9:22                       ` Paraschiv, Andra-Irina
2020-04-27  9:46                         ` Paolo Bonzini [this message]
2020-04-27 10:00                           ` Paraschiv, Andra-Irina
2020-04-28 15:07                       ` Alexander Graf
2020-04-29 13:20                         ` Paolo Bonzini
2020-04-30 13:59                           ` Paraschiv, Andra-Irina
2020-04-30 10:34                         ` Paolo Bonzini
2020-04-30 11:21                           ` Alexander Graf
2020-04-30 11:38                             ` Paolo Bonzini
2020-04-30 11:47                               ` Alexander Graf
2020-04-30 11:58                                 ` Paolo Bonzini
2020-04-30 12:19                                   ` Alexander Graf
2020-05-07 17:44       ` Pavel Machek
2020-05-08  7:00         ` Paraschiv, Andra-Irina
2020-05-09 19:21           ` Pavel Machek
2020-05-10 11:02             ` Herrenschmidt, Benjamin
2020-05-11 10:49               ` Paraschiv, Andra-Irina
2020-05-11 13:49               ` Stefan Hajnoczi
2020-04-24  3:04     ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-04-24  8:19       ` Paraschiv, Andra-Irina
2020-04-24  9:54         ` Paraschiv, Andra-Irina
2020-04-26  1:55           ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-04-27 18:39             ` Paraschiv, Andra-Irina
2020-04-24  9:59     ` Tian, Kevin
2020-04-24 13:59       ` Paraschiv, Andra-Irina
2020-04-26  8:16         ` Tian, Kevin
2020-04-27 19:05           ` Paraschiv, Andra-Irina
     [not found]         ` <CAKXe6SLonLQLAOY9Q_2AzTeg4uJxiknsAWnJpTF0hMcXEG5Tew@mail.gmail.com>
2020-05-11 12:05           ` Paraschiv, Andra-Irina
2020-04-25 15:25     ` Liran Alon
2020-04-27  7:56       ` Paraschiv, Andra-Irina
2020-04-27 11:44         ` Liran Alon
2020-04-28 15:25           ` Alexander Graf
2020-04-28 16:01             ` Liran Alon

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