From: Pavel Machek <pavel@ucw.cz> To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Cc: x86@kernel.org, platform-driver-x86@vger.kernel.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, linux-sgx@vger.kernel.org, andriy.shevchenko@linux.intel.com, Jonathan Corbet <corbet@lwn.net>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>, "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>, open list <linux-kernel@vger.kernel.org> Subject: Re: [PATCH v14 19/19] x86/sgx: Driver documentation Date: Thu, 18 Oct 2018 11:57:27 +0200 [thread overview] Message-ID: <20181018095727.GC10861@amd> (raw) In-Reply-To: <alpine.DEB.2.21.1810180205490.5022@jsakkine-mobl1> [-- Attachment #1: Type: text/plain, Size: 1437 bytes --] On Thu 2018-10-18 02:45:27, Jarkko Sakkinen wrote: > On Mon, 15 Oct 2018, Pavel Machek wrote: > >On Tue 2018-09-25 16:06:56, Jarkko Sakkinen wrote: > >>+Intel(R) SGX is a set of CPU instructions that can be used by applications to > >>+set aside private regions of code and data. The code outside the enclave is > >>+disallowed to access the memory inside the enclave by the CPU access control. > >>+In a way you can think that SGX provides inverted sandbox. It protects the > >>+application from a malicious host. > > > >Well, recently hardware had some problems keeping its > >promises. So... what about rowhammer, meltdown and spectre? > > Doesn't hardware always have this problem over time? No, not really. In this case, tries to protect from hardware "attacks" done by machine owner. That job is theoretically impossible, so you have harder situation than most.. > >Which ones apply, which ones do not, and on what cpu generations? > > Definitely should be refined. > > Meltdowns approach AFAIK does not work because reads outside the enclave > will always have a predefined value (-1) but only if the page is present, > which was later exploited in the Foreshadow attack. What about L1tf and https://github.com/lsds/spectre-attack-sgx ? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 181 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@ucw.cz> To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Cc: <x86@kernel.org>, <platform-driver-x86@vger.kernel.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>, <linux-sgx@vger.kernel.org>, <andriy.shevchenko@linux.intel.com>, Jonathan Corbet <corbet@lwn.net>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>, "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>, open list <linux-kernel@vger.kernel.org> Subject: Re: [PATCH v14 19/19] x86/sgx: Driver documentation Date: Thu, 18 Oct 2018 11:57:27 +0200 [thread overview] Message-ID: <20181018095727.GC10861@amd> (raw) In-Reply-To: <alpine.DEB.2.21.1810180205490.5022@jsakkine-mobl1> [-- Attachment #1: Type: text/plain, Size: 1437 bytes --] On Thu 2018-10-18 02:45:27, Jarkko Sakkinen wrote: > On Mon, 15 Oct 2018, Pavel Machek wrote: > >On Tue 2018-09-25 16:06:56, Jarkko Sakkinen wrote: > >>+Intel(R) SGX is a set of CPU instructions that can be used by applications to > >>+set aside private regions of code and data. The code outside the enclave is > >>+disallowed to access the memory inside the enclave by the CPU access control. > >>+In a way you can think that SGX provides inverted sandbox. It protects the > >>+application from a malicious host. > > > >Well, recently hardware had some problems keeping its > >promises. So... what about rowhammer, meltdown and spectre? > > Doesn't hardware always have this problem over time? No, not really. In this case, tries to protect from hardware "attacks" done by machine owner. That job is theoretically impossible, so you have harder situation than most.. > >Which ones apply, which ones do not, and on what cpu generations? > > Definitely should be refined. > > Meltdowns approach AFAIK does not work because reads outside the enclave > will always have a predefined value (-1) but only if the page is present, > which was later exploited in the Foreshadow attack. What about L1tf and https://github.com/lsds/spectre-attack-sgx ? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 181 bytes --]
next prev parent reply other threads:[~2018-10-18 9:57 UTC|newest] Thread overview: 184+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-09-25 13:06 [PATCH v14 00/19] Intel SGX1 support Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 01/19] x86/sgx: Update MAINTAINERS Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 02/19] x86/sgx: Architectural structures Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 03/19] x86/cpufeature: Add SGX and SGX_LC CPU features Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 04/19] x86/cpufeatures: Add SGX feature bits Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 16:48 ` Borislav Petkov 2018-09-25 16:48 ` Borislav Petkov 2018-09-25 16:48 ` Borislav Petkov 2018-09-26 11:11 ` Jarkko Sakkinen 2018-09-26 11:11 ` Jarkko Sakkinen 2018-09-26 11:11 ` Jarkko Sakkinen 2018-09-26 11:36 ` Borislav Petkov 2018-09-26 11:36 ` Borislav Petkov 2018-09-27 13:16 ` Jarkko Sakkinen 2018-09-27 13:16 ` Jarkko Sakkinen 2018-09-27 13:51 ` Borislav Petkov 2018-09-27 13:51 ` Borislav Petkov 2018-09-27 14:52 ` Jarkko Sakkinen 2018-09-27 14:52 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 05/19] x86/msr: Add SGX definitions to msr-index.h Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 06/19] x86/mm: x86/sgx: Add new 'PF_SGX' page fault error code bit Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 07/19] x86/fault: x86/mm/pkeys: relocate stale comment regarding OSPKE Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 08/19] signal: x86/sgx: Add SIGSEGV siginfo code for SGX EPCM fault Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-26 19:14 ` Sean Christopherson 2018-09-26 19:14 ` Sean Christopherson 2018-09-26 19:14 ` Sean Christopherson 2018-09-27 18:41 ` Eric W. Biederman 2018-09-27 18:41 ` Eric W. Biederman 2018-09-27 18:41 ` Eric W. Biederman 2018-09-25 13:06 ` [PATCH v14 09/19] x86/mm: x86/sgx: Signal SEGV_SGXERR for #PFs w/ PF_SGX Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 22:53 ` Andy Lutomirski 2018-09-25 22:53 ` Andy Lutomirski 2018-09-26 17:35 ` Sean Christopherson 2018-09-26 17:35 ` Sean Christopherson 2018-09-26 18:12 ` Andy Lutomirski 2018-09-26 18:12 ` Andy Lutomirski 2018-09-26 20:16 ` Dave Hansen 2018-09-26 20:16 ` Dave Hansen 2018-09-26 20:44 ` Sean Christopherson 2018-09-26 20:44 ` Sean Christopherson 2018-09-26 20:49 ` Dave Hansen 2018-09-26 20:49 ` Dave Hansen 2018-09-26 21:15 ` Andy Lutomirski 2018-09-26 21:15 ` Andy Lutomirski 2018-09-26 21:45 ` Dave Hansen 2018-09-26 21:45 ` Dave Hansen 2018-09-26 22:37 ` Andy Lutomirski 2018-09-26 22:37 ` Andy Lutomirski 2018-09-27 14:21 ` Jarkko Sakkinen 2018-09-27 14:21 ` Jarkko Sakkinen 2018-09-27 14:41 ` Andy Lutomirski 2018-09-27 14:41 ` Andy Lutomirski 2018-09-27 13:56 ` Jarkko Sakkinen 2018-09-27 13:56 ` Jarkko Sakkinen 2018-10-01 21:42 ` Jethro Beekman 2018-10-01 22:03 ` Dave Hansen 2018-10-31 21:30 ` Sean Christopherson 2018-10-31 21:30 ` Sean Christopherson 2018-10-31 21:35 ` Dave Hansen 2018-10-31 21:35 ` Dave Hansen 2018-10-31 21:53 ` Jethro Beekman 2018-10-31 21:58 ` Dave Hansen 2018-10-31 22:52 ` Andy Lutomirski 2018-10-31 22:52 ` Andy Lutomirski 2018-11-01 17:51 ` Dave Hansen 2018-11-01 17:52 ` Andy Lutomirski 2018-11-01 17:52 ` Andy Lutomirski 2018-11-01 17:42 ` Jarkko Sakkinen 2018-11-01 17:42 ` Jarkko Sakkinen 2018-11-01 17:42 ` Jarkko Sakkinen 2018-11-01 17:44 ` Jarkko Sakkinen 2018-11-01 17:44 ` Jarkko Sakkinen 2018-11-01 17:44 ` Jarkko Sakkinen 2018-10-02 0:31 ` Jarkko Sakkinen 2018-10-02 0:31 ` Jarkko Sakkinen 2018-10-01 14:29 ` Sean Christopherson 2018-10-01 14:29 ` Sean Christopherson 2018-10-01 14:41 ` Dave Hansen 2018-10-01 14:41 ` Dave Hansen 2018-10-02 0:07 ` Jarkko Sakkinen 2018-10-02 0:07 ` Jarkko Sakkinen 2018-09-27 13:42 ` Jarkko Sakkinen 2018-09-27 13:42 ` Jarkko Sakkinen 2018-09-27 14:58 ` Dave Hansen 2018-09-27 14:58 ` Dave Hansen 2018-09-27 15:39 ` Jarkko Sakkinen 2018-09-27 15:39 ` Jarkko Sakkinen 2018-09-27 15:53 ` Dave Hansen 2018-09-27 15:53 ` Dave Hansen 2018-09-27 13:14 ` Jarkko Sakkinen 2018-09-27 13:14 ` Jarkko Sakkinen 2018-09-27 19:43 ` Eric W. Biederman 2018-09-27 19:43 ` Eric W. Biederman 2018-09-27 19:43 ` Eric W. Biederman 2018-09-28 12:17 ` Jarkko Sakkinen 2018-09-28 12:17 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 10/19] x86/sgx: Detect Intel SGX Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 20:02 ` Randy Dunlap 2018-09-25 20:02 ` Randy Dunlap 2018-09-25 20:02 ` Randy Dunlap 2018-09-27 13:13 ` Jarkko Sakkinen 2018-09-27 13:13 ` Jarkko Sakkinen 2018-09-27 13:13 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 11/19] x86/sgx: Add wrappers for ENCLS leaf functions Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 20:01 ` Randy Dunlap 2018-09-25 20:01 ` Randy Dunlap 2018-09-25 20:01 ` Randy Dunlap 2018-09-27 13:12 ` Jarkko Sakkinen 2018-09-27 13:12 ` Jarkko Sakkinen 2018-09-27 13:12 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 12/19] x86/sgx: Add data structures for tracking the EPC pages Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 20:00 ` Randy Dunlap 2018-09-25 20:00 ` Randy Dunlap 2018-09-25 20:00 ` Randy Dunlap 2018-09-27 13:11 ` Jarkko Sakkinen 2018-09-27 13:11 ` Jarkko Sakkinen 2018-09-27 13:11 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 13/19] x86/sgx: Enclave Page Cache (EPC) memory manager Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 14/19] x86/sgx: Add sgx_einit() for initializing enclaves Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 15/19] platform/x86: Intel SGX driver Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-10-04 18:01 ` Sean Christopherson 2018-10-04 18:01 ` Sean Christopherson 2018-10-04 18:01 ` Sean Christopherson 2018-10-05 11:32 ` Jarkko Sakkinen 2018-10-05 11:32 ` Jarkko Sakkinen 2018-10-05 11:32 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 16/19] platform/x86: Add swapping functionality to the " Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 17/19] x86/sgx: Add a simple swapper for the EPC memory manager Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 18/19] platform/x86: ptrace() support for the SGX driver Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` [PATCH v14 19/19] x86/sgx: Driver documentation Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:06 ` Jarkko Sakkinen 2018-09-25 13:27 ` Jonathan Corbet 2018-09-25 13:27 ` Jonathan Corbet 2018-09-25 13:27 ` Jonathan Corbet 2018-10-15 20:54 ` Pavel Machek 2018-10-15 20:54 ` Pavel Machek 2018-10-17 23:45 ` Jarkko Sakkinen 2018-10-17 23:45 ` Jarkko Sakkinen 2018-10-18 9:57 ` Pavel Machek [this message] 2018-10-18 9:57 ` Pavel Machek 2018-10-19 23:59 ` Jarkko Sakkinen 2018-10-19 23:59 ` Jarkko Sakkinen 2018-10-17 23:56 ` Dave Hansen 2018-10-17 23:56 ` Dave Hansen
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