linux-kernel - Re: [PATCH v3 02/18] nitro_enclaves: Define the PCI device interface

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Message-ID: <20200526064455.GA2580530@kroah.com>
Date:   Tue, 26 May 2020 08:44:55 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Andra Paraschiv <andraprs@...zon.com>
Cc:     linux-kernel@...r.kernel.org,
        Anthony Liguori <aliguori@...zon.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Colm MacCarthaigh <colmmacc@...zon.com>,
        Bjoern Doebel <doebel@...zon.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Frank van der Linden <fllinden@...zon.com>,
        Alexander Graf <graf@...zon.de>,
        Martin Pohlack <mpohlack@...zon.de>,
        Matt Wilson <msw@...zon.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Balbir Singh <sblbir@...zon.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stewart Smith <trawets@...zon.com>,
        Uwe Dannowski <uwed@...zon.de>, kvm@...r.kernel.org,
        ne-devel-upstream@...zon.com
Subject: Re: [PATCH v3 02/18] nitro_enclaves: Define the PCI device interface

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.

thanks,

greg k-h