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From: "Paraschiv, Andra-Irina" <andraprs@amazon.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: <linux-kernel@vger.kernel.org>,
	Anthony Liguori <aliguori@amazon.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Colm MacCarthaigh <colmmacc@amazon.com>,
	Bjoern Doebel <doebel@amazon.de>,
	David Woodhouse <dwmw@amazon.co.uk>,
	Frank van der Linden <fllinden@amazon.com>,
	"Alexander Graf" <graf@amazon.de>,
	Martin Pohlack <mpohlack@amazon.de>, Matt Wilson <msw@amazon.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Balbir Singh <sblbir@amazon.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	"Stefan Hajnoczi" <stefanha@redhat.com>,
	Stewart Smith <trawets@amazon.com>,
	"Uwe Dannowski" <uwed@amazon.de>, <kvm@vger.kernel.org>,
	<ne-devel-upstream@amazon.com>
Subject: Re: [PATCH v3 02/18] nitro_enclaves: Define the PCI device interface
Date: Thu, 28 May 2020 19:37:06 +0300	[thread overview]
Message-ID: <ceca466d-4c2e-8693-08c7-1fea5ab68cb7@amazon.com> (raw)
In-Reply-To: <20200526222109.GB179549@kroah.com>



On 27/05/2020 01:21, Greg KH wrote:
> On Tue, May 26, 2020 at 08:01:36PM +0300, Paraschiv, Andra-Irina wrote:
>>
>> On 26/05/2020 09:44, Greg KH wrote:
>>> On Tue, May 26, 2020 at 01:13:18AM +0300, Andra Paraschiv wrote:
>>>> +struct enclave_get_slot_req {
>>>> +	/* Context ID (CID) for the enclave vsock device. */
>>>> +	u64 enclave_cid;
>>>> +} __attribute__ ((__packed__));
>>> Can you really "pack" a single member structure?
>>>
>>> Anyway, we have better ways to specify this instead of the "raw"
>>> __attribute__ option.  But first see if you really need any of these, at
>>> first glance, I do not think you do at all, and they can all be removed.
>> There are a couple of data structures with more than one member and multiple
>> field sizes. And for the ones that are not, gathered as feedback from
>> previous rounds of review that should consider adding a "flags" field in
>> there for further extensibility.
> Please do not do that in ioctls.  Just create new calls instead of
> trying to "extend" existing ones.  It's always much easier.
>
>> I can modify to have "__packed" instead of the attribute callout.
> Make sure you even need that, as I don't think you do for structures
> like the above one, right?

For the ones like the above, not, I just customized the usage of "__packed".

Thanks,
Andra



Amazon Development Center (Romania) S.R.L. registered office: 27A Sf. Lazar Street, UBC5, floor 2, Iasi, Iasi County, 700045, Romania. Registered in Romania. Registration number J22/2621/2005.

  reply	other threads:[~2020-05-28 16:37 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-25 22:13 [PATCH v3 00/18] Add support for Nitro Enclaves Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 01/18] nitro_enclaves: Add ioctl interface definition Andra Paraschiv
2020-05-27  8:49   ` Stefan Hajnoczi
2020-05-28 18:05     ` Paraschiv, Andra-Irina
2020-06-01  3:02     ` Benjamin Herrenschmidt
2020-06-01  7:20       ` Paraschiv, Andra-Irina
2020-06-05  8:15         ` Stefan Hajnoczi
2020-06-05 15:39           ` Paraschiv, Andra-Irina
2020-05-25 22:13 ` [PATCH v3 02/18] nitro_enclaves: Define the PCI device interface Andra Paraschiv
2020-05-26  6:44   ` Greg KH
2020-05-26 17:01     ` Paraschiv, Andra-Irina
2020-05-26 22:21       ` Greg KH
2020-05-28 16:37         ` Paraschiv, Andra-Irina [this message]
2020-06-01  2:59         ` Benjamin Herrenschmidt
2020-06-01  7:07           ` Paraschiv, Andra-Irina
2020-06-01  2:53       ` Benjamin Herrenschmidt
2020-05-25 22:13 ` [PATCH v3 03/18] nitro_enclaves: Define enclave info for internal bookkeeping Andra Paraschiv
2020-05-26  6:46   ` Greg KH
2020-05-26 17:20     ` Paraschiv, Andra-Irina
2020-05-25 22:13 ` [PATCH v3 04/18] nitro_enclaves: Init PCI device driver Andra Paraschiv
2020-05-26  6:48   ` Greg KH
2020-05-26 18:35     ` Paraschiv, Andra-Irina
2020-05-26 22:19       ` Greg KH
2020-05-28 16:26         ` Paraschiv, Andra-Irina
2020-06-01  2:55       ` Benjamin Herrenschmidt
2020-06-01  6:42         ` Paraschiv, Andra-Irina
2020-05-25 22:13 ` [PATCH v3 05/18] nitro_enclaves: Handle PCI device command requests Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 06/18] nitro_enclaves: Handle out-of-band PCI device events Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 07/18] nitro_enclaves: Init misc device providing the ioctl interface Andra Paraschiv
2020-05-26  6:51   ` Greg KH
2020-05-26 11:42     ` Alexander Graf
2020-05-26 12:33       ` Greg KH
2020-05-26 12:44         ` Alexander Graf
2020-05-26 13:17           ` Greg KH
2020-05-26 13:44             ` Alexander Graf
2020-05-26 22:24               ` Greg KH
2020-05-28 13:01                 ` Alexander Graf
2020-05-28 13:12                   ` Greg KH
2020-05-28 17:06                     ` Paraschiv, Andra-Irina
2020-06-01  3:04                     ` Benjamin Herrenschmidt
2020-06-09 10:47                       ` Alexander Graf
2020-06-01  3:01                 ` Benjamin Herrenschmidt
2020-06-01  2:51           ` Benjamin Herrenschmidt
2020-05-26 13:40         ` Paraschiv, Andra-Irina
2020-06-01  2:47     ` Benjamin Herrenschmidt
2020-06-01  5:48       ` Greg KH
2020-05-25 22:13 ` [PATCH v3 08/18] nitro_enclaves: Add logic for enclave vm creation Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 09/18] nitro_enclaves: Add logic for enclave vcpu creation Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 10/18] nitro_enclaves: Add logic for enclave image load metadata Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 11/18] nitro_enclaves: Add logic for enclave memory region set Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 12/18] nitro_enclaves: Add logic for enclave start Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 13/18] nitro_enclaves: Add logic for enclave termination Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 14/18] nitro_enclaves: Add Kconfig for the Nitro Enclaves driver Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 15/18] nitro_enclaves: Add Makefile " Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 16/18] nitro_enclaves: Add sample for ioctl interface usage Andra Paraschiv
2020-05-26  6:52   ` Greg KH
2020-05-25 22:13 ` [PATCH v3 17/18] nitro_enclaves: Add overview documentation Andra Paraschiv
2020-05-25 22:13 ` [PATCH v3 18/18] MAINTAINERS: Add entry for the Nitro Enclaves driver Andra Paraschiv

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