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Wed, 7 Aug 2019 06:40:30 +0000 From: Jethro Beekman To: Jarkko Sakkinen , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , "linux-sgx@vger.kernel.org" CC: "akpm@linux-foundation.org" , "dave.hansen@intel.com" , "sean.j.christopherson@intel.com" , "nhorman@redhat.com" , "npmccallum@redhat.com" , "serge.ayoun@intel.com" , "shay.katz-zamir@intel.com" , "haitao.huang@intel.com" , "andriy.shevchenko@linux.intel.com" , "tglx@linutronix.de" , "kai.svahn@intel.com" , "bp@alien8.de" , "josh@joshtriplett.org" , "luto@kernel.org" , "kai.huang@intel.com" , "rientjes@google.com" , "cedric.xing@intel.com" Subject: Re: [PATCH v21 00/28] Intel SGX foundations Thread-Topic: [PATCH v21 00/28] Intel SGX foundations Thread-Index: AQHVOZ2TUfYdM/CPWE6WCIX/rqIUqKbKL+2AgCUy3wA= Date: Wed, 7 Aug 2019 06:40:30 +0000 Message-ID: References: <20190713170804.2340-1-jarkko.sakkinen@linux.intel.com> <20190714143653.ziwgmtgysknxfgnl@linux.intel.com> In-Reply-To: <20190714143653.ziwgmtgysknxfgnl@linux.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-clientproxiedby: BL0PR01CA0015.prod.exchangelabs.com (2603:10b6:208:71::28) To SN6PR11MB3167.namprd11.prod.outlook.com (2603:10b6:805:c4::16) authentication-results: spf=none (sender IP is ) smtp.mailfrom=jethro@fortanix.com; 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charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2019-07-14 07:36, Jarkko Sakkinen wrote: > On Sat, Jul 13, 2019 at 08:07:36PM +0300, Jarkko Sakkinen wrote: >> v21: >> * Check on mmap() that the VMA does cover an area that does not have >> enclave pages. Only mapping with PROT_NONE can do that to reserve >> initial address space for an enclave. >> * Check om mmap() and mprotect() that the VMA permissions do not >> surpass the enclave permissions. >> * Remove two refcounts from vma_close(): mm_list and encl->refcount. >> Enclave refcount is only need for swapper/enclave sync and we can >> remove mm_list refcount by destroying mm_struct when the process >> is closed. By not having vm_close() the Linux MM can merge VMAs. >> * Do not naturally align MAP_FIXED address. >> * Numerous small fixes and clean ups. >> * Use SRCU for synchronizing the list of mm_struct's. >> * Move to stack based call convention in the vDSO. >=20 > I forgot something: >=20 > * CONFIG_INTEL_SGX_DRIVER is not bistate i.e. no more LKM support. It i= s > still useful to have the compile-time option because VM host does no= t > need to have it enabled. Now sgx_init() calls explicitly sgx_drv_ini= t(). > In addition, platform driver has been ripped a way because we no > longer need ACPI hotplug. In effect, the device is now parentless. >=20 I think you also missed in the changelog that you're now checking page=20 permissions in EADD. -- Jethro Beekman | Fortanix --------------ms050905070108070004010706 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCC Cx8wggUxMIIEGaADAgECAhBdZC9mIseKJlmxx1xn+g00MA0GCSqGSIb3DQEBCwUAMIGXMQsw CQYDVQQGEwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxm b3JkMRowGAYDVQQKExFDT01PRE8gQ0EgTGltaXRlZDE9MDsGA1UEAxM0Q09NT0RPIFJTQSBD bGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQTAeFw0xODA5MTUwMDAw MDBaFw0xOTA5MTUyMzU5NTlaMCQxIjAgBgkqhkiG9w0BCQEWE2pldGhyb0Bmb3J0YW5peC5j b20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDRQDOQsroKjy2xAQCXLyqryJt4 Xwj8hcweJCzOnjILKHIoWlOQ0b9yIbFLIWBRt/9zdxlE5ZabDVHnkIyhcVgtU/BA73e78Wx2 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