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Date: Wed, 13 Jan 2021 19:00:33 +0100 From: Borislav Petkov <bp@...en8.de> To: "Paul E. McKenney" <paulmck@...nel.org> Cc: Jarkko Sakkinen <jarkko@...nel.org>, x86@...nel.org, linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org, Sean Christopherson <seanjc@...gle.com>, Haitao Huang <haitao.huang@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Jethro Beekman <jethro@...tanix.com> Subject: Re: [PATCH v3] x86/sgx: Synchronize encl->srcu in sgx_encl_release(). On Wed, Jan 13, 2021 at 09:46:02AM -0800, Paul E. McKenney wrote: < Lemme trim that mail fat > > It seems to me that loading and unloading SGX enclaves qualifies as a > configuration operation, so use of synchronize_srcu_expedited() should be > just fine in that case. This of course implies that SGX enclaves should > not be loaded or unloaded while an aggressive real-time application > is running. Which might well be the case for other reasons. I believe RT and SGX should be orthogonal to each-other unless someone rolls out of the woodwork, wanting to run realtime enclaves... Ewww. > So I believe synchronize_srcu_expedited() should be fine in this case. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
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