From: Dave Hansen <dave.hansen@intel.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: x86@kernel.org, platform-driver-x86@vger.kernel.org,
linux-sgx@vger.kernel.org, nhorman@redhat.com,
npmccallum@redhat.com, serge.ayoun@intel.com,
shay.katz-zamir@intel.com, haitao.huang@linux.intel.com,
andriy.shevchenko@linux.intel.com, tglx@linutronix.de,
kai.svahn@intel.com, mark.shanahan@intel.com,
luto@amacapital.net, Suresh Siddha <suresh.b.siddha@intel.com>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Darren Hart <dvhart@infradead.org>,
Andy Shevchenko <andy@infradead.org>,
"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v17 18/23] platform/x86: Intel SGX driver
Date: Mon, 17 Dec 2018 11:09:33 -0800 [thread overview]
Message-ID: <cf377db5-c702-0a1d-42b3-4caeb14eb6fa@intel.com> (raw)
In-Reply-To: <20181217184858.GF12491@linux.intel.com>
On 12/17/18 10:48 AM, Sean Christopherson wrote:
> We can't set mm to NULL as we need it to unregister the notifier, and
> I'm fairly certain attempting to unregister in the release callback
> will deadlock.
Suggestion:
It looks like you only expect one VMA per enclave. Things go bonkers if
this is not true. So, instead of storing encl->mm, don't. You can get
the mm from vma->vm_mm and you could just store encl->vma instead.
Doing that, you could even axe encl->base and encl->size, I think
because you just get those from the VMA itself.
That makes the relationship clearer: 1 VMA per enclave. We also
implicitly understand that if you have a VMA, you implicitly have a ref
to the mm *and* the VMA is immutable.
If there were ever a path where encl->vma wasn't immutable, we'd have a
bug (or load of bugs) somewhere, right?
next prev parent reply other threads:[~2018-12-17 19:09 UTC|newest]
Thread overview: 305+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20181116010412.23967-1-jarkko.sakkinen@linux.intel.com>
2018-11-16 1:01 ` [PATCH v17 01/23] x86/sgx: Update MAINTAINERS Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 14:22 ` Borislav Petkov
2018-11-16 15:07 ` Jarkko Sakkinen
2018-11-16 20:24 ` Borislav Petkov
2018-11-18 8:20 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 02/23] x86/cpufeatures: Add Intel-defined SGX feature bit Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 14:28 ` Borislav Petkov
2018-11-16 14:28 ` Borislav Petkov
2018-11-16 15:13 ` Jarkko Sakkinen
2018-11-16 15:13 ` Jarkko Sakkinen
2018-11-16 15:18 ` Jarkko Sakkinen
2018-11-16 15:18 ` Jarkko Sakkinen
2018-11-16 20:53 ` Borislav Petkov
2018-11-16 20:53 ` Borislav Petkov
2018-11-16 1:01 ` [PATCH v17 03/23] x86/cpufeatures: Add SGX sub-features (as Linux-defined bits) Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 14:37 ` Borislav Petkov
2018-11-16 14:37 ` Borislav Petkov
2018-11-16 15:38 ` Sean Christopherson
2018-11-16 15:38 ` Sean Christopherson
2018-11-16 23:31 ` Dave Hansen
2018-11-16 23:31 ` Dave Hansen
2018-11-18 8:36 ` Jarkko Sakkinen
2018-11-18 8:36 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 04/23] x86/msr: Add IA32_FEATURE_CONTROL.SGX_ENABLE definition Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 05/23] x86/cpufeatures: Add Intel-defined SGX_LC feature bit Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 06/23] x86/cpu/intel: Detect SGX support and update caps appropriately Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 23:32 ` Dave Hansen
2018-11-16 23:32 ` Dave Hansen
2018-11-18 8:37 ` Jarkko Sakkinen
2018-11-18 8:37 ` Jarkko Sakkinen
2018-11-21 18:17 ` Borislav Petkov
2018-11-21 18:17 ` Borislav Petkov
2018-11-24 13:54 ` Jarkko Sakkinen
2018-11-24 13:54 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 07/23] x86/mm: x86/sgx: Add new 'PF_SGX' page fault error code bit Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 23:33 ` Dave Hansen
2018-11-16 23:33 ` Dave Hansen
2018-11-18 8:38 ` Jarkko Sakkinen
2018-11-18 8:38 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 08/23] x86/mm: x86/sgx: Signal SIGSEGV for userspace #PFs w/ PF_SGX Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 09/23] x86/sgx: Define SGX1 and SGX2 ENCLS leafs Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 10/23] x86/sgx: Add ENCLS architectural error codes Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 11/23] x86/sgx: Add SGX1 and SGX2 architectural data structures Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 12/23] x86/sgx: Add definitions for SGX's CPUID leaf and variable sub-leafs Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 13/23] x86/msr: Add SGX Launch Control MSR definitions Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 17:29 ` Sean Christopherson
2018-11-16 17:29 ` Sean Christopherson
2018-11-18 8:19 ` Jarkko Sakkinen
2018-11-18 8:19 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 14/23] x86/sgx: Add wrappers for ENCLS leaf functions Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 15/23] x86/sgx: Enumerate and track EPC sections Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 16/23] x86/sgx: Add functions to allocate and free EPC pages Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 17/23] x86/sgx: Add sgx_einit() for initializing enclaves Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 18/23] platform/x86: Intel SGX driver Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:37 ` Randy Dunlap
2018-11-16 1:37 ` Randy Dunlap
2018-11-16 11:23 ` Jarkko Sakkinen
2018-11-16 11:23 ` Jarkko Sakkinen
2018-11-19 15:06 ` Jarkko Sakkinen
2018-11-19 15:06 ` Jarkko Sakkinen
2018-11-19 16:22 ` Jethro Beekman
2018-11-19 16:22 ` Jethro Beekman
2018-11-19 17:19 ` Jarkko Sakkinen
2018-11-19 17:19 ` Jarkko Sakkinen
2018-11-19 17:39 ` Jethro Beekman
2018-11-20 10:58 ` Jarkko Sakkinen
2018-11-21 15:24 ` Jarkko Sakkinen
2018-11-19 18:18 ` Andy Lutomirski
2018-11-19 18:18 ` Andy Lutomirski
2018-11-20 11:00 ` Jarkko Sakkinen
2018-11-20 11:00 ` Jarkko Sakkinen
2018-11-19 15:29 ` Andy Lutomirski
2018-11-19 16:19 ` Jarkko Sakkinen
2018-11-19 16:59 ` Andy Lutomirski
2018-11-20 12:04 ` Jarkko Sakkinen
2018-11-22 11:12 ` Dr. Greg
2018-11-22 15:21 ` Andy Lutomirski
2018-11-22 15:21 ` Andy Lutomirski
2018-11-24 17:21 ` Jarkko Sakkinen
2018-11-24 17:21 ` Jarkko Sakkinen
2018-11-24 20:13 ` Dr. Greg
2018-11-24 20:13 ` Dr. Greg
2018-11-26 21:15 ` Jarkko Sakkinen
2018-11-26 21:15 ` Jarkko Sakkinen
2018-11-25 14:53 ` Jarkko Sakkinen
2018-11-25 14:53 ` Jarkko Sakkinen
2018-11-25 16:22 ` Andy Lutomirski
2018-11-25 16:22 ` Andy Lutomirski
2018-11-25 18:55 ` Dr. Greg
2018-11-25 18:55 ` Dr. Greg
2018-11-25 23:51 ` Jarkko Sakkinen
[not found] ` <D45BC005-5064-4C75-B486-4E43C454E2F6@amacapital.net>
2018-11-26 0:37 ` Andy Lutomirski
2018-11-26 0:37 ` Andy Lutomirski
2018-11-26 11:00 ` Dr. Greg
2018-11-26 11:00 ` Dr. Greg
2018-11-26 18:22 ` Andy Lutomirski
2018-11-26 18:22 ` Andy Lutomirski
2018-11-26 22:16 ` Jarkko Sakkinen
2018-11-26 22:16 ` Jarkko Sakkinen
2018-11-26 21:51 ` Jarkko Sakkinen
2018-11-26 21:51 ` Jarkko Sakkinen
2018-11-26 23:04 ` Jarkko Sakkinen
2018-11-26 23:04 ` Jarkko Sakkinen
2018-11-27 8:55 ` Dr. Greg
2018-11-27 8:55 ` Dr. Greg
2018-11-27 16:41 ` Jarkko Sakkinen
2018-11-27 16:41 ` Jarkko Sakkinen
2018-11-27 17:55 ` Andy Lutomirski
2018-11-27 17:55 ` Andy Lutomirski
2018-11-28 10:49 ` Dr. Greg
2018-11-28 10:49 ` Dr. Greg
2018-11-28 19:22 ` Jarkko Sakkinen
2018-11-28 19:22 ` Jarkko Sakkinen
2018-12-10 10:49 ` Dr. Greg
2018-12-10 10:49 ` Dr. Greg
2018-12-12 18:00 ` Jarkko Sakkinen
2018-12-12 18:00 ` Jarkko Sakkinen
2018-12-14 23:59 ` Dr. Greg
2018-12-14 23:59 ` Dr. Greg
2018-12-15 0:06 ` Sean Christopherson
2018-12-15 0:06 ` Sean Christopherson
2018-12-15 23:22 ` Dr. Greg
2018-12-15 23:22 ` Dr. Greg
2018-12-17 14:27 ` Sean Christopherson
2018-12-17 14:27 ` Sean Christopherson
2018-12-17 13:28 ` Jarkko Sakkinen
2018-12-17 13:28 ` Jarkko Sakkinen
2018-12-17 13:39 ` Jarkko Sakkinen
2018-12-17 13:39 ` Jarkko Sakkinen
2018-12-17 14:08 ` Jarkko Sakkinen
2018-12-17 14:08 ` Jarkko Sakkinen
2018-12-17 14:13 ` Jarkko Sakkinen
2018-12-17 14:13 ` Jarkko Sakkinen
2018-12-17 16:34 ` Dr. Greg
2018-12-17 16:34 ` Dr. Greg
2018-12-17 17:31 ` Sean Christopherson
2018-12-17 17:31 ` Sean Christopherson
2018-12-17 17:49 ` Jarkko Sakkinen
2018-12-17 17:49 ` Jarkko Sakkinen
2018-12-17 18:09 ` Sean Christopherson
2018-12-17 18:09 ` Sean Christopherson
2018-12-17 18:23 ` Jarkko Sakkinen
2018-12-17 18:23 ` Jarkko Sakkinen
2018-12-17 18:46 ` Sean Christopherson
2018-12-17 18:46 ` Sean Christopherson
2018-12-17 19:36 ` Jarkko Sakkinen
2018-12-17 19:36 ` Jarkko Sakkinen
2018-11-27 16:46 ` Jarkko Sakkinen
2018-11-27 16:46 ` Jarkko Sakkinen
2018-11-28 21:52 ` Andy Lutomirski
2018-11-28 21:52 ` Andy Lutomirski
2018-11-27 7:46 ` Jethro Beekman
2018-11-27 16:36 ` Jarkko Sakkinen
2018-11-22 20:56 ` Andy Lutomirski
2018-11-22 20:56 ` Andy Lutomirski
2018-11-23 10:39 ` Dr. Greg
2018-11-23 10:39 ` Dr. Greg
2018-11-24 16:45 ` Jarkko Sakkinen
2018-11-24 16:45 ` Jarkko Sakkinen
2018-11-28 5:08 ` Jarkko Sakkinen
2018-11-28 5:08 ` Jarkko Sakkinen
2018-11-28 5:38 ` Jethro Beekman
2018-12-09 17:01 ` Pavel Machek
2018-12-09 17:01 ` Pavel Machek
2018-11-20 11:15 ` Dr. Greg
2018-11-20 11:15 ` Dr. Greg
2018-11-24 16:15 ` Jarkko Sakkinen
2018-11-24 19:24 ` Dr. Greg
2018-11-26 19:39 ` Jarkko Sakkinen
2018-12-09 17:01 ` Pavel Machek
2018-12-09 17:01 ` Pavel Machek
2018-12-10 14:46 ` Dr. Greg
2018-12-10 14:46 ` Dr. Greg
2018-12-17 17:45 ` Dave Hansen
2018-12-17 17:45 ` Dave Hansen
2018-12-17 18:01 ` Jarkko Sakkinen
2018-12-17 18:01 ` Jarkko Sakkinen
2018-12-17 18:07 ` Dave Hansen
2018-12-17 18:07 ` Dave Hansen
2018-12-17 18:31 ` Jarkko Sakkinen
2018-12-17 18:31 ` Jarkko Sakkinen
2018-12-17 18:36 ` Sean Christopherson
2018-12-17 18:36 ` Sean Christopherson
2018-12-17 18:43 ` Jarkko Sakkinen
2018-12-17 18:43 ` Jarkko Sakkinen
2018-12-17 18:47 ` Dave Hansen
2018-12-17 18:47 ` Dave Hansen
2018-12-17 19:12 ` Andy Lutomirski
2018-12-17 19:12 ` Andy Lutomirski
2018-12-17 19:17 ` Dave Hansen
2018-12-17 19:17 ` Dave Hansen
2018-12-17 19:25 ` Andy Lutomirski
2018-12-17 19:25 ` Andy Lutomirski
2018-12-17 19:54 ` Jarkko Sakkinen
2018-12-17 19:54 ` Jarkko Sakkinen
2018-12-17 19:49 ` Jarkko Sakkinen
2018-12-17 19:49 ` Jarkko Sakkinen
2018-12-17 19:53 ` Dave Hansen
2018-12-17 19:53 ` Dave Hansen
2018-12-17 19:55 ` Andy Lutomirski
2018-12-17 19:55 ` Andy Lutomirski
2018-12-17 20:03 ` Dave Hansen
2018-12-17 20:03 ` Dave Hansen
2018-12-17 20:10 ` Andy Lutomirski
2018-12-17 20:10 ` Andy Lutomirski
2018-12-17 20:15 ` Dave Hansen
2018-12-17 20:15 ` Dave Hansen
2018-12-17 22:36 ` Sean Christopherson
2018-12-17 22:36 ` Sean Christopherson
2018-12-18 1:40 ` Jarkko Sakkinen
2018-12-18 1:40 ` Jarkko Sakkinen
2018-12-17 22:20 ` Sean Christopherson
2018-12-17 22:20 ` Sean Christopherson
2018-12-18 1:39 ` Jarkko Sakkinen
2018-12-18 1:39 ` Jarkko Sakkinen
2018-12-18 3:27 ` Jarkko Sakkinen
2018-12-18 3:27 ` Jarkko Sakkinen
2018-12-18 5:02 ` Andy Lutomirski
2018-12-18 5:02 ` Andy Lutomirski
2018-12-18 13:27 ` Jarkko Sakkinen
2018-12-18 13:27 ` Jarkko Sakkinen
2018-12-18 4:55 ` Andy Lutomirski
2018-12-18 4:55 ` Andy Lutomirski
2018-12-18 13:18 ` Jarkko Sakkinen
2018-12-18 13:18 ` Jarkko Sakkinen
2018-12-18 4:59 ` Andy Lutomirski
2018-12-18 4:59 ` Andy Lutomirski
2018-12-18 13:11 ` Jarkko Sakkinen
2018-12-18 13:11 ` Jarkko Sakkinen
2018-12-18 15:44 ` Sean Christopherson
2018-12-18 15:44 ` Sean Christopherson
2018-12-18 18:53 ` Sean Christopherson
2018-12-18 18:53 ` Sean Christopherson
2018-12-19 5:00 ` Jarkko Sakkinen
2018-12-19 5:00 ` Jarkko Sakkinen
2018-12-19 5:13 ` Jarkko Sakkinen
2018-12-19 5:13 ` Jarkko Sakkinen
2018-12-21 18:28 ` Sean Christopherson
2018-12-21 18:28 ` Sean Christopherson
2018-12-22 0:01 ` Jarkko Sakkinen
2018-12-22 0:01 ` Jarkko Sakkinen
2018-12-19 4:47 ` Jarkko Sakkinen
2018-12-19 4:47 ` Jarkko Sakkinen
2018-12-19 5:24 ` Jarkko Sakkinen
2018-12-19 5:24 ` Jarkko Sakkinen
2018-12-18 1:17 ` Jarkko Sakkinen
2018-12-18 1:17 ` Jarkko Sakkinen
2018-12-18 1:31 ` Jarkko Sakkinen
2018-12-18 1:31 ` Jarkko Sakkinen
2018-12-17 18:48 ` Sean Christopherson
2018-12-17 18:48 ` Sean Christopherson
2018-12-17 19:09 ` Dave Hansen [this message]
2018-12-17 19:09 ` Dave Hansen
2018-12-17 19:37 ` Jarkko Sakkinen
2018-12-17 19:37 ` Jarkko Sakkinen
2018-12-17 19:40 ` Dave Hansen
2018-12-17 19:40 ` Dave Hansen
2018-12-17 19:33 ` Jarkko Sakkinen
2018-12-17 19:33 ` Jarkko Sakkinen
2018-12-17 20:21 ` Jarkko Sakkinen
2018-12-17 20:21 ` Jarkko Sakkinen
2018-12-18 13:13 ` Jarkko Sakkinen
2018-12-18 13:13 ` Jarkko Sakkinen
2018-12-18 15:46 ` Sean Christopherson
2018-12-18 15:46 ` Sean Christopherson
2018-12-18 5:55 ` Andy Lutomirski
2018-12-18 5:55 ` Andy Lutomirski
2018-12-19 5:22 ` Jarkko Sakkinen
2018-12-19 5:22 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 19/23] platform/x86: sgx: Add swapping functionality to the " Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 20/23] x86/sgx: Add a simple swapper for the EPC memory manager Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 21/23] platform/x86: ptrace() support for the SGX driver Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 22/23] x86/sgx: SGX documentation Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-12-03 3:28 ` Randy Dunlap
2018-12-03 9:32 ` Jarkko Sakkinen
2018-11-16 1:01 ` [PATCH v17 23/23] selftests/x86: Add a selftest for SGX Jarkko Sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 1:01 ` jarkko.sakkinen
2018-11-16 1:01 ` Jarkko Sakkinen
2018-11-16 11:17 ` [PATCH v17 00/23] Intel SGX1 support Jarkko Sakkinen
2018-11-16 11:17 ` Jarkko Sakkinen
2018-11-16 11:17 ` jarkko.sakkinen
2018-11-16 11:17 ` Jarkko Sakkinen
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