Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938580AbcKWNjl (ORCPT ); Wed, 23 Nov 2016 08:39:41 -0500 Received: from foss.arm.com ([217.140.101.70]:52670 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936437AbcKWNji (ORCPT ); Wed, 23 Nov 2016 08:39:38 -0500 Date: Wed, 23 Nov 2016 13:38:55 +0000 From: Mark Rutland To: David Howells Cc: lukas@wunner.de, linux-efi@vger.kernel.org, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/6] arm/efi: Allow invocation of arbitrary runtime services [ver #2] Message-ID: <20161123133855.GG24624@leverpostej> References: <20161123102747.GD24624@leverpostej> <147986054870.13790.8640536414645705863.stgit@warthog.procyon.org.uk> <147986056324.13790.12670822944798392730.stgit@warthog.procyon.org.uk> <6125.1479901598@warthog.procyon.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6125.1479901598@warthog.procyon.org.uk> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1054 Lines: 28 On Wed, Nov 23, 2016 at 11:46:38AM +0000, David Howells wrote: > Mark Rutland wrote: > > On Wed, Nov 23, 2016 at 12:22:43AM +0000, David Howells wrote: > > > Provide the ability to perform mixed-mode runtime service calls for arm in > > > the same way that commit 0a637ee61247bd4bed9b2a07568ef7a1cfc76187 > > > ("x86/efi: Allow invocation of arbitrary boot services") provides the > > > ability to invoke arbitrary boot services. > > > > I'm not sure I understand. On arm/arm64, "mixed-mode" simply isn't possible. > > > > I see we already call runtime services directly in efi_get_secureboot() > > in drivers/firmware/efi/libstub/arm-stub.c. > > > > If this is just to provide a consistent API for the stub, please note > > that. > > How about: > > arm/efi: Allow invocation of arbitrary runtime services > > efi_call_runtime() is provided for x86 to be able abstract mixed mode > support. Provide this for ARM also so that common code work in mixed mode > also. That sounds good to me. Thanks, Mark.