linux-kernel - Re: [PATCH v2 08/18] nitro_enclaves: Add logic for enclave vm creation

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Message-ID: <736f5245-af92-9d6d-6d17-7cd50fbe6c2a@amazon.com>
Date:   Mon, 25 May 2020 23:53:13 +0300
From:   "Paraschiv, Andra-Irina" <andraprs@...zon.com>
To:     Greg KH <gregkh@...uxfoundation.org>
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 v2 08/18] nitro_enclaves: Add logic for enclave vm
 creation



On 22/05/2020 10:08, Greg KH wrote:
> On Fri, May 22, 2020 at 09:29:36AM +0300, Andra Paraschiv wrote:
>> Add ioctl command logic for enclave VM creation. It triggers a slot
>> allocation. The enclave resources will be associated with this slot and
>> it will be used as an identifier for triggering enclave run.
>>
>> Return a file descriptor, namely enclave fd. This is further used by the
>> associated user space enclave process to set enclave resources and
>> trigger enclave termination.
>>
>> The poll function is implemented in order to notify the enclave process
>> when an enclave exits without a specific enclave termination command
>> trigger e.g. when an enclave crashes.
>>
>> Signed-off-by: Alexandru Vasile <lexnv@...zon.com>
>> Signed-off-by: Andra Paraschiv <andraprs@...zon.com>
>> ---
>>   drivers/virt/nitro_enclaves/ne_misc_dev.c | 169 ++++++++++++++++++++++
>>   1 file changed, 169 insertions(+)
>>
>> diff --git a/drivers/virt/nitro_enclaves/ne_misc_dev.c b/drivers/virt/nitro_enclaves/ne_misc_dev.c
>> index e1866fac8220..1036221238f4 100644
>> --- a/drivers/virt/nitro_enclaves/ne_misc_dev.c
>> +++ b/drivers/virt/nitro_enclaves/ne_misc_dev.c
>> @@ -63,6 +63,146 @@ struct ne_cpu_pool {
>>   
>>   static struct ne_cpu_pool ne_cpu_pool;
>>   
>> +static int ne_enclave_open(struct inode *node, struct file *file)
>> +{
>> +	return 0;
>> +}
> Again, if a file operation does nothing, don't even provide it.

I removed open() in v3.

Thank you.

Andra



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