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From: Jethro Beekman <jethro@fortanix.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>,
	Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: "linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
	Dave Hansen <dave.hansen@intel.com>,
	Cedric Xing <cedric.xing@intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	"Dr . Greg Wettstein" <greg@enjellic.com>
Subject: Re: [PATCH 7/7] x86/sgx: Add a reserved field to sgx_enclave_add_region to drop 'packed'
Date: Thu, 13 Jun 2019 00:44:28 +0000
Message-ID: <271c7507-b043-1ba4-b603-17cf7bf7b313@fortanix.com> (raw)
In-Reply-To: <20190612152341.GE20308@linux.intel.com>

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On 2019-06-12 08:23, Sean Christopherson wrote:
> On Wed, Jun 12, 2019 at 06:14:39PM +0300, Jarkko Sakkinen wrote:
>> On Wed, Jun 05, 2019 at 12:48:45PM -0700, Sean Christopherson wrote:
>>> A reserved field could prove useful in the future, and packed structs
>>> can result in inefficiencies due to its impact on alignment.
>>>
>>> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
>>
>> Rather should extend mrmask just to 32 bits.
> 
> I considered that option, but extending mrmask would probably confusing
> to userspace, e.g. we'd have to document that bits 31:15 are ignored.
> 

Yeah this doesn't make a whole lot of sense to me.

--
Jethro Beekman | Fortanix


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  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-05 19:48 [PATCH 0/7] x86/sgx: Clean up and enhance add pages ioctl Sean Christopherson
2019-06-05 19:48 ` [PATCH 1/7] x86/sgx: Remove dead code to handle non-existent IOR ioctl Sean Christopherson
2019-06-05 19:48 ` [PATCH 2/7] x86/sgx: Remove unnecessary @cmd parameter from ioctl helpers Sean Christopherson
2019-06-05 19:48 ` [PATCH 3/7] x86/sgx: Let ioctl helpers do copy to/from user Sean Christopherson
2019-06-05 19:48 ` [PATCH 4/7] x86/sgx: Allow userspace to add multiple pages in single ioctl() Sean Christopherson
2019-06-06 15:47   ` Jarkko Sakkinen
2019-06-13  0:43   ` Jethro Beekman
2019-06-13 16:51     ` Sean Christopherson
2019-06-13 19:05       ` Andy Lutomirski
2019-06-13 19:15         ` Sean Christopherson
2019-06-13 19:45       ` Xing, Cedric
2019-06-05 19:48 ` [PATCH 5/7] x86/sgx: Add flag to zero added region instead of copying from source Sean Christopherson
2019-06-06 17:20   ` Andy Lutomirski
2019-06-06 17:32     ` Sean Christopherson
2019-06-07 19:32       ` Andy Lutomirski
2019-06-10 17:06         ` Jarkko Sakkinen
2019-06-10 18:09         ` Xing, Cedric
2019-06-10 18:41           ` Sean Christopherson
2019-06-10 18:53         ` Sean Christopherson
2019-06-13  0:38           ` Jethro Beekman
2019-06-13 13:46             ` Sean Christopherson
2019-06-13 16:16               ` Andy Lutomirski
2019-06-13 16:54                 ` Sean Christopherson
2019-06-05 19:48 ` [PATCH 6/7] x86/sgx: Use the actual zero page as the source when adding zero pages Sean Christopherson
2019-06-05 19:48 ` [PATCH 7/7] x86/sgx: Add a reserved field to sgx_enclave_add_region to drop 'packed' Sean Christopherson
2019-06-05 19:59   ` Dave Hansen
2019-06-05 20:00     ` Andy Lutomirski
2019-06-12 15:14   ` Jarkko Sakkinen
2019-06-12 15:23     ` Sean Christopherson
2019-06-13  0:44       ` Jethro Beekman [this message]
2019-06-13 15:38       ` Jarkko Sakkinen
2019-06-12 15:16 ` [PATCH 0/7] x86/sgx: Clean up and enhance add pages ioctl Jarkko Sakkinen
2019-06-12 18:14   ` Jarkko Sakkinen

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