From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 40rfWC4frrzDr2J for ; Thu, 24 May 2018 03:23:51 +1000 (AEST) Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) by bilbo.ozlabs.org (Postfix) with ESMTP id 40rfWC202jz8tLb for ; Thu, 24 May 2018 03:23:51 +1000 (AEST) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40rfWB5BGRz9s15 for ; Thu, 24 May 2018 03:23:50 +1000 (AEST) Subject: Patch "powerpc/64s: Wire up cpu_show_spectre_v1()" has been added to the 4.16-stable tree To: greg@kroah.com, gregkh@linuxfoundation.org, linuxppc-dev@ozlabs.org, mpe@ellerman.id.au, tglx@linutronix.de Cc: From: Date: Wed, 23 May 2018 19:23:12 +0200 In-Reply-To: <20180522144125.10345-11-mpe@ellerman.id.au> Message-ID: <15270961929234@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a note to let you know that I've just added the patch titled powerpc/64s: Wire up cpu_show_spectre_v1() to the 4.16-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: powerpc-64s-wire-up-cpu_show_spectre_v1.patch and it can be found in the queue-4.16 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Wed May 23 19:18:22 CEST 2018 From: Michael Ellerman Date: Wed, 23 May 2018 00:41:21 +1000 Subject: powerpc/64s: Wire up cpu_show_spectre_v1() To: greg@kroah.com Cc: stable@vger.kernel.org, tglx@linutronix.de, linuxppc-dev@ozlabs.org Message-ID: <20180522144125.10345-11-mpe@ellerman.id.au> From: Michael Ellerman commit 56986016cb8cd9050e601831fe89f332b4e3c46e upstream. Add a definition for cpu_show_spectre_v1() to override the generic version. Currently this just prints "Not affected" or "Vulnerable" based on the firmware flag. Although the kernel does have array_index_nospec() in a few places, we haven't yet audited all the powerpc code to see where it's necessary, so for now we don't list that as a mitigation. Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/kernel/security.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -50,3 +50,11 @@ ssize_t cpu_show_meltdown(struct device return sprintf(buf, "Vulnerable\n"); } + +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf) +{ + if (!security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR)) + return sprintf(buf, "Not affected\n"); + + return sprintf(buf, "Vulnerable\n"); +} Patches currently in stable-queue which might be from mpe@ellerman.id.au are queue-4.16/powerpc-pseries-fix-clearing-of-security-feature-flags.patch queue-4.16/powerpc-powernv-set-or-clear-security-feature-flags.patch queue-4.16/powerpc-64s-move-cpu_show_meltdown.patch queue-4.16/powerpc-pseries-set-or-clear-security-feature-flags.patch queue-4.16/powerpc-move-default-security-feature-flags.patch queue-4.16/powerpc-powernv-use-the-security-flags-in-pnv_setup_rfi_flush.patch queue-4.16/powerpc-add-security-feature-flags-for-spectre-meltdown.patch queue-4.16/powerpc-pseries-use-the-security-flags-in-pseries_setup_rfi_flush.patch queue-4.16/powerpc-64s-enhance-the-information-in-cpu_show_meltdown.patch queue-4.16/powerpc-rfi-flush-always-enable-fallback-flush-on-pseries.patch queue-4.16/powerpc-pseries-add-new-h_get_cpu_characteristics-flags.patch queue-4.16/powerpc-64s-add-support-for-a-store-forwarding-barrier-at-kernel-entry-exit.patch queue-4.16/powerpc-64s-wire-up-cpu_show_spectre_v1.patch queue-4.16/powerpc-64s-wire-up-cpu_show_spectre_v2.patch