From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B4A7C4332F for ; Tue, 15 Nov 2022 20:19:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231142AbiKOUTH (ORCPT ); Tue, 15 Nov 2022 15:19:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230083AbiKOUTG (ORCPT ); Tue, 15 Nov 2022 15:19:06 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 04AEB2B244; Tue, 15 Nov 2022 12:19:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=p0GkDIqlaDtoqXa413Yu7SgMe+uJq2kGGguXZr+J0IA=; b=e6vnBK5ePXjGJx/5vJts9ENaef 3tatlAx4cg6sUjNfqAiuLFU8jnWZteZrH15vHmfjIsaWFY0Y2GBRcbafj7G4J4xGpvrfj+p0LmQxw cfus1poMbpdzG7Z3l1FJD7uY/vwtXRTD/25IJ2S9+1bZVjuusrPW+gNM7AzOTSu0kiVtxpoMI2sU/ 46ZLwbREHDtEiIB7vLrCymqp7cBiF8uxILtvBxqaSowQvaYiMM7s1HxN6W/p4G2cCbhxx1JnbHUaO J7DnbW7RJdhbRzGHrchoPjHqI94lcesVFwtXh5dUVHJmXaLyAYEp3QosmXOplOsEwuFcyvchW1uFy dnALxZ9Q==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1ov2O5-0015uW-5M; Tue, 15 Nov 2022 20:18:29 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 6B3E93002EC; Tue, 15 Nov 2022 15:22:01 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 544152CB43B65; Tue, 15 Nov 2022 15:22:01 +0100 (CET) Date: Tue, 15 Nov 2022 15:22:01 +0100 From: Peter Zijlstra To: Rick Edgecombe Cc: x86@kernel.org, "H . Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H . J . Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Randy Dunlap , "Ravi V . Shankar" , Weijiang Yang , "Kirill A . Shutemov" , John Allen , kcc@google.com, eranian@google.com, rppt@kernel.org, jamorris@linux.microsoft.com, dethoma@microsoft.com, akpm@linux-foundation.org, Yu-cheng Yu Subject: Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk Message-ID: References: <20221104223604.29615-1-rick.p.edgecombe@intel.com> <20221104223604.29615-28-rick.p.edgecombe@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221104223604.29615-28-rick.p.edgecombe@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Fri, Nov 04, 2022 at 03:35:54PM -0700, Rick Edgecombe wrote: > +static unsigned long get_user_shstk_addr(void) > +{ > + unsigned long long ssp; > + > + fpregs_lock_and_load(); > + > + rdmsrl(MSR_IA32_PL3_SSP, ssp); > + > + fpregs_unlock(); > + > + return ssp; > +} This doesn't return the shstk addr, unlike what the name suggests, right?