From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
linux-sgx@vger.kernel.org, akpm@linux-foundation.org,
dave.hansen@intel.com, nhorman@redhat.com, npmccallum@redhat.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,
puiterwijk@redhat.com, Serge Ayoun <serge.ayoun@intel.com>
Subject: Re: [PATCH v25 07/21] x86/sgx: Enumerate and track EPC sections
Date: Thu, 6 Feb 2020 17:35:19 +0200 [thread overview]
Message-ID: <20200206153519.GB9694@linux.intel.com> (raw)
In-Reply-To: <20200205195700.GJ4877@linux.intel.com>
On Wed, Feb 05, 2020 at 11:57:00AM -0800, Sean Christopherson wrote:
> 3. Breaks on-demand paging when running in a VM, e.g. if the VMM chooses
> to allocate a physical EPC page when it's actually accessed by the
> VM. I don't expect this to be a problem any time soon, as all VMMs
> will likely preallocate EPC pages until KVM (or any other hypervisor)
> gains EPC oversusbscription support, which may or may not ever happen.
> But, I'd prefer to simply not have the problem in the first place.
So wouldn't it be better to revisit this when the VM changes are added.
/Jarkko
next prev parent reply other threads:[~2020-02-06 15:35 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-04 6:05 [PATCH v25 00/21] Intel SGX foundations Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 01/21] x86/cpufeatures: x86/msr: Add Intel SGX hardware bits Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 02/21] x86/cpufeatures: x86/msr: Intel SGX Launch Control " Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 03/21] x86/mm: x86/sgx: Signal SIGSEGV with PF_SGX Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 04/21] x86/sgx: Add SGX microarchitectural data structures Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 05/21] x86/sgx: Add wrappers for ENCLS leaf functions Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 06/21] x86/cpu/intel: Detect SGX supprt Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 07/21] x86/sgx: Enumerate and track EPC sections Jarkko Sakkinen
2020-02-05 19:57 ` Sean Christopherson
2020-02-05 23:11 ` Jarkko Sakkinen
2020-02-06 15:34 ` Jarkko Sakkinen
2020-02-06 15:35 ` Jarkko Sakkinen [this message]
2020-02-06 15:55 ` Sean Christopherson
2020-02-04 6:05 ` [PATCH v25 08/21] x86/sgx: Add functions to allocate and free EPC pages Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 09/21] mm: Introduce vm_ops->may_mprotect() Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 10/21] x86/sgx: Linux Enclave Driver Jarkko Sakkinen
2020-02-04 6:18 ` Jarkko Sakkinen
2020-02-05 15:58 ` Haitao Huang
2020-02-07 17:03 ` Haitao Huang
2020-02-04 6:05 ` [PATCH v25 11/21] selftests/x86: Recurse into subdirectories Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 12/21] selftests/x86: Add a selftest for SGX Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 13/21] x86/sgx: Add provisioning Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 14/21] x86/sgx: Add a page reclaimer Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 15/21] x86/sgx: ptrace() support for the SGX driver Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 16/21] x86/vdso: Add support for exception fixup in vDSO functions Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 17/21] x86/fault: Add helper function to sanitize error code Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 18/21] x86/traps: Attempt to fixup exceptions in vDSO before signaling Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 19/21] x86/vdso: Add __vdso_sgx_enter_enclave() to wrap SGX enclave transitions Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 20/21] selftests/x86: Add vDSO selftest for SGX Jarkko Sakkinen
2020-02-04 6:05 ` [PATCH v25 21/21] docs: x86/sgx: Document SGX micro architecture and kernel internals Jarkko Sakkinen
2020-02-05 17:54 ` Randy Dunlap
2020-02-05 23:07 ` Jarkko Sakkinen
2020-02-05 23:10 ` Randy Dunlap
2020-02-06 14:50 ` Jarkko Sakkinen
2020-02-04 15:11 ` [PATCH v25 00/21] Intel SGX foundations Sean Christopherson
2020-02-05 21:59 ` Jarkko Sakkinen
2020-02-05 23:09 ` Jarkko Sakkinen
2020-02-05 16:01 ` Haitao Huang
2020-02-05 22:01 ` Jarkko Sakkinen
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