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From: Dave Hansen <dave.hansen@intel.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: x86@kernel.org, platform-driver-x86@vger.kernel.org,
	sean.j.christopherson@intel.com, nhorman@redhat.com,
	npmccallum@redhat.com, linux-sgx@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	Suresh Siddha <suresh.b.siddha@intel.com>,
	Serge Ayoun <serge.ayoun@intel.com>,
	"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
	<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v13 09/13] x86/sgx: Enclave Page Cache (EPC) memory manager
Date: Tue, 28 Aug 2018 07:07:33 -0700	[thread overview]
Message-ID: <132d309d-77e2-52ed-7251-abb2c80cdf49@intel.com> (raw)
In-Reply-To: <20180828083540.GH15508@linux.intel.com>

On 08/28/2018 01:35 AM, Jarkko Sakkinen wrote:
> On Mon, Aug 27, 2018 at 02:15:34PM -0700, Dave Hansen wrote:
>> On 08/27/2018 11:53 AM, Jarkko Sakkinen wrote:
>>> +struct sgx_epc_page_ops {
>>> +	bool (*get)(struct sgx_epc_page *epc_page);
>>> +	void (*put)(struct sgx_epc_page *epc_page);
>>> +	bool (*reclaim)(struct sgx_epc_page *epc_page);
>>> +	void (*block)(struct sgx_epc_page *epc_page);
>>> +	void (*write)(struct sgx_epc_page *epc_page);
>>> +};
>> Why do we need a fancy, slow (retpoline'd) set of function pointers when
>> we only have one user of these (the SGX driver)?
> KVM has its own implementation for these operations.

That belongs in the changelog.

Also, where is the implementation?  How can we assess this code that was
built to create an abstraction without both of the users?

  reply	other threads:[~2018-08-28 14:07 UTC|newest]

Thread overview: 103+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-27 18:53 [PATCH v13 00/13] Intel SGX1 support Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 01/13] x86/sgx: Update MAINTAINERS Jarkko Sakkinen
2018-09-03 12:56   ` Andy Shevchenko
2018-09-03 19:10     ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 02/13] x86/cpufeature: Add SGX and SGX_LC CPU features Jarkko Sakkinen
2018-08-28  0:07   ` Huang, Kai
2018-08-28  7:17     ` Jarkko Sakkinen
2018-08-29  7:36       ` Huang, Kai
2018-08-31 12:19         ` Jarkko Sakkinen
2018-08-31 16:18   ` Dr. Greg
2018-08-27 18:53 ` [PATCH v13 03/13] x86/cpufeatures: Add Intel-defined SGX leaf CPUID_12_EAX Jarkko Sakkinen
2018-08-27 19:39   ` Dave Hansen
2018-08-28  7:23     ` Jarkko Sakkinen
2018-08-28 10:21   ` Borislav Petkov
2018-08-28 10:38     ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 04/13] x86/sgx: Architectural structures Jarkko Sakkinen
2018-08-27 19:41   ` Dave Hansen
2018-08-28  8:08     ` Jarkko Sakkinen
2018-09-03 13:16   ` Andy Shevchenko
2018-09-03 19:17     ` Jarkko Sakkinen
2018-09-04 16:04     ` Dave Hansen
2018-09-04 16:06       ` Andy Shevchenko
2018-09-05 17:32       ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 05/13] x86/msr: Add SGX definitions to msr-index.h Jarkko Sakkinen
2018-08-27 19:42   ` Dave Hansen
2018-08-28  8:11     ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 06/13] x86/sgx: Detect Intel SGX Jarkko Sakkinen
2018-08-27 19:53   ` Dave Hansen
2018-08-28  8:28     ` Jarkko Sakkinen
2018-09-03 14:26   ` Andy Shevchenko
2018-09-04  9:56     ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 07/13] x86/sgx: Add data structures for tracking the EPC pages Jarkko Sakkinen
2018-08-27 21:07   ` Dave Hansen
2018-08-28 10:30     ` Jarkko Sakkinen
2018-08-28 16:53       ` Dave Hansen
2018-08-28 21:34         ` Sean Christopherson
2018-08-31 11:13           ` Jarkko Sakkinen
2018-08-31 11:10         ` Jarkko Sakkinen
2018-09-03 14:41   ` Andy Shevchenko
2018-09-04  9:59     ` Jarkko Sakkinen
2018-09-04 17:49     ` Sean Christopherson
2018-09-04 18:01       ` Andy Shevchenko
2018-09-04 18:17         ` Sean Christopherson
2018-09-05 17:36           ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 08/13] x86/sgx: Add wrappers for ENCLS leaf functions Jarkko Sakkinen
2018-09-03 15:01   ` Andy Shevchenko
2018-09-04 11:09     ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 09/13] x86/sgx: Enclave Page Cache (EPC) memory manager Jarkko Sakkinen
2018-08-27 21:14   ` Dave Hansen
2018-08-28  8:36     ` Jarkko Sakkinen
2018-08-27 21:15   ` Dave Hansen
2018-08-28  8:35     ` Jarkko Sakkinen
2018-08-28 14:07       ` Dave Hansen [this message]
2018-08-28 21:22         ` Sean Christopherson
2018-08-28 21:26           ` Dave Hansen
2018-08-28 21:52             ` Sean Christopherson
2018-08-31 11:22           ` Jarkko Sakkinen
2018-09-03 19:02   ` Andy Shevchenko
2018-09-04 15:38     ` Jarkko Sakkinen
2018-09-04 15:45       ` Sean Christopherson
2018-09-11 15:04   ` Sean Christopherson
2018-09-16 11:40     ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 10/13] x86/sgx: Add sgx_einit() for initializing enclaves Jarkko Sakkinen
2018-08-27 21:41   ` Huang, Kai
2018-08-28  7:01     ` Jarkko Sakkinen
2018-08-29  7:33       ` Huang, Kai
2018-08-29 20:33         ` Sean Christopherson
2018-08-29 20:58           ` Huang, Kai
2018-08-29 21:09             ` Sean Christopherson
2018-08-30  1:45               ` Huang, Kai
2018-08-31 17:43                 ` Sean Christopherson
2018-08-31 21:34                   ` Dr. Greg
2018-09-03 19:27                     ` Jarkko Sakkinen
2018-09-03 18:15                 ` Jarkko Sakkinen
2018-08-31 12:17         ` Jarkko Sakkinen
2018-08-31 18:15           ` Sean Christopherson
2018-09-03 19:19             ` Jarkko Sakkinen
2018-09-03 23:45               ` Huang, Kai
2018-09-04 14:54                 ` Sean Christopherson
2018-09-04 15:30                   ` Jarkko Sakkinen
2018-09-04 16:35                     ` Sean Christopherson
2018-09-04 22:13                       ` Huang, Kai
2018-09-05 17:39                       ` Jarkko Sakkinen
2018-09-04 15:26                 ` Jarkko Sakkinen
2018-09-03 13:53   ` Jann Horn
2018-09-04  9:55     ` Jarkko Sakkinen
2018-09-04 16:05   ` Andy Shevchenko
2018-08-27 18:53 ` [PATCH v13 11/13] platform/x86: Intel SGX driver Jarkko Sakkinen
2018-09-04 17:59   ` Andy Shevchenko
2018-09-05 17:33     ` Jarkko Sakkinen
2018-09-05 17:36       ` Andy Shevchenko
2018-09-06  9:21         ` Jarkko Sakkinen
2018-09-06 17:35           ` Miguel Ojeda
2018-09-07  0:50             ` Joe Perches
2018-09-07 17:02               ` Sean Christopherson
2018-09-10 18:37               ` Jarkko Sakkinen
2018-09-10 21:22                 ` Joe Perches
2018-09-10 18:33             ` Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 12/13] platform/x86: ptrace() support for the " Jarkko Sakkinen
2018-08-27 18:53 ` [PATCH v13 13/13] x86/sgx: Driver documentation Jarkko Sakkinen
2018-08-27 19:40   ` Randy Dunlap
2018-08-28  7:58     ` Jarkko Sakkinen
2018-08-28  8:03   ` Jarkko Sakkinen

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