From: Sean Christopherson <sean.j.christopherson@intel.com>
To: "Xing, Cedric" <cedric.xing@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
"linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"Hansen, Dave" <dave.hansen@intel.com>,
"nhorman@redhat.com" <nhorman@redhat.com>,
"npmccallum@redhat.com" <npmccallum@redhat.com>,
"Ayoun, Serge" <serge.ayoun@intel.com>,
"Katz-zamir, Shay" <shay.katz-zamir@intel.com>,
"Huang, Haitao" <haitao.huang@intel.com>,
"andriy.shevchenko@linux.intel.com"
<andriy.shevchenko@linux.intel.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"Svahn, Kai" <kai.svahn@intel.com>, "bp@alien8.de" <bp@alien8.de>,
"josh@joshtriplett.org" <josh@joshtriplett.org>,
"Huang, Kai" <kai.huang@intel.com>,
"rientjes@google.com" <rientjes@google.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Haitao Huang <haitao.huang@linux.intel.com>,
Jethro Beekman <jethro@fortanix.com>,
"Dr . Greg Wettstein" <greg@enjellic.com>
Subject: Re: [PATCH v19,RESEND 24/27] x86/vdso: Add __vdso_sgx_enter_enclave() to wrap SGX enclave transitions
Date: Fri, 22 Mar 2019 14:20:15 -0700 [thread overview]
Message-ID: <20190322212011.GD12666@linux.intel.com> (raw)
In-Reply-To: <960B34DE67B9E140824F1DCDEC400C0F4E85C6B5@ORSMSX116.amr.corp.intel.com>
On Wed, Mar 20, 2019 at 05:17:53PM -0700, Xing, Cedric wrote:
> > On Wed, Mar 20, 2019 at 12:57:52PM -0700, Xing, Cedric wrote:
> > > > Using the untrusted stack as a way to exchange data is very
> > > > convenient, but that doesn't mean it's a good idea. Here are some
> > > > problems it
> > > > causes:
> > > >
> > > > - It prevents using a normal function to wrap enclave entry (as
> > > > we're seeing with this patch set).
> > >
> > > It doesn't prevent.
> >
> > Yes it does, keyword being "normal". Though I guess we could do a bit
> > of bikeshedding on the definition of normal...
>
> I don't understand what you mean by "normal".
My apologies, I missed the code snippet in your original code, I was
thinking of a previous idea involving a JMP %rbp. Please ignore this
bit of discussion.
next prev parent reply other threads:[~2019-03-22 21:20 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-20 16:20 [PATCH v19,RESEND 00/27] Intel SGX1 support Jarkko Sakkinen
2019-03-20 16:20 ` [PATCH v19,RESEND 01/27] x86/cpufeatures: Add Intel-defined SGX feature bit Jarkko Sakkinen
2019-03-20 19:41 ` Neil Horman
2019-03-21 14:16 ` Jarkko Sakkinen
2019-03-20 16:20 ` [PATCH v19,RESEND 02/27] x86/cpufeatures: Add SGX sub-features (as Linux-defined bits) Jarkko Sakkinen
2019-03-20 16:20 ` [PATCH v19,RESEND 03/27] x86/msr: Add IA32_FEATURE_CONTROL.SGX_ENABLE definition Jarkko Sakkinen
2019-03-20 16:20 ` [PATCH v19,RESEND 04/27] x86/cpufeatures: Add Intel-defined SGX_LC feature bit Jarkko Sakkinen
2019-03-20 16:20 ` [PATCH v19,RESEND 05/27] x86/msr: Add SGX Launch Control MSR definitions Jarkko Sakkinen
2019-03-20 16:20 ` [PATCH v19,RESEND 06/27] x86/mm: x86/sgx: Add new 'PF_SGX' page fault error code bit Jarkko Sakkinen
2019-03-20 16:20 ` [PATCH v19,RESEND 07/27] x86/mm: x86/sgx: Signal SIGSEGV for userspace #PFs w/ PF_SGX Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 08/27] x86/cpu/intel: Detect SGX support and update caps appropriately Jarkko Sakkinen
2019-03-26 12:17 ` Huang, Kai
2019-03-26 14:27 ` Sean Christopherson
2019-03-26 21:25 ` Huang, Kai
2019-03-26 21:57 ` Sean Christopherson
2019-03-26 23:19 ` Huang, Kai
2019-03-20 16:21 ` [PATCH v19,RESEND 09/27] x86/sgx: Add ENCLS architectural error codes Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 10/27] x86/sgx: Add SGX1 and SGX2 architectural data structures Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 11/27] x86/sgx: Add definitions for SGX's CPUID leaf and variable sub-leafs Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 12/27] x86/sgx: Enumerate and track EPC sections Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 13/27] x86/sgx: Add wrappers for ENCLS leaf functions Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 14/27] x86/sgx: Add functions to allocate and free EPC pages Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 15/27] x86/sgx: Add sgx_einit() for initializing enclaves Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 16/27] x86/sgx: Add the Linux SGX Enclave Driver Jarkko Sakkinen
2019-03-26 12:01 ` Huang, Kai
2019-03-26 12:40 ` Thomas Gleixner
2019-03-26 14:54 ` Sean Christopherson
2019-03-26 21:11 ` Huang, Kai
2019-03-27 5:02 ` Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 17/27] x86/sgx: Add provisioning Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 18/27] x86/sgx: Add swapping code to the core and SGX driver Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 19/27] x86/sgx: ptrace() support for the " Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 20/27] x86/vdso: Add support for exception fixup in vDSO functions Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 21/27] x86/fault: Add helper function to sanitize error code Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 22/27] x86/fault: Attempt to fixup unhandled #PF in vDSO before signaling Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 23/27] x86/traps: Attempt to fixup exceptions " Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 24/27] x86/vdso: Add __vdso_sgx_enter_enclave() to wrap SGX enclave transitions Jarkko Sakkinen
2019-03-20 18:30 ` Xing, Cedric
2019-03-20 18:52 ` Andy Lutomirski
2019-03-20 19:57 ` Xing, Cedric
2019-03-20 21:03 ` Sean Christopherson
2019-03-21 0:17 ` Xing, Cedric
2019-03-22 21:20 ` Sean Christopherson [this message]
2019-03-21 17:17 ` Andy Lutomirski
2019-03-22 20:31 ` Xing, Cedric
2019-03-20 19:02 ` Jethro Beekman
2019-03-20 20:10 ` Xing, Cedric
2019-03-20 19:13 ` Sean Christopherson
2019-03-20 20:38 ` Xing, Cedric
2019-03-22 21:59 ` Sean Christopherson
2019-03-23 17:36 ` Xing, Cedric
2019-03-23 21:38 ` Andy Lutomirski
2019-03-24 8:59 ` Xing, Cedric
2019-03-25 18:03 ` Sean Christopherson
2019-03-25 23:59 ` Andy Lutomirski
2019-03-26 4:53 ` Xing, Cedric
2019-03-26 17:08 ` Andy Lutomirski
2019-03-28 4:23 ` Xing, Cedric
2019-03-28 19:18 ` Andy Lutomirski
2019-03-28 23:19 ` Xing, Cedric
2019-03-29 9:48 ` Jarkko Sakkinen
2019-03-31 8:43 ` Dr. Greg
2019-04-03 23:03 ` Sean Christopherson
2019-03-25 23:54 ` Andy Lutomirski
2019-03-26 4:16 ` Xing, Cedric
2019-03-20 16:21 ` [PATCH v19,RESEND 25/27] x86/sgx: SGX documentation Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 26/27] selftests/x86: Add a selftest for SGX Jarkko Sakkinen
2019-03-20 16:21 ` [PATCH v19,RESEND 27/27] x86/sgx: Update MAINTAINERS Jarkko Sakkinen
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