From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35572 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755474AbeDQQIl (ORCPT ); Tue, 17 Apr 2018 12:08:41 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , Lorenzo Pieralisi , Will Deacon , Catalin Marinas , Greg Hackmann , Mark Rutland Subject: [PATCH 4.9 22/66] drivers/firmware: Expose psci_get_version through psci_ops structure Date: Tue, 17 Apr 2018 17:58:55 +0200 Message-Id: <20180417155646.810533738@linuxfoundation.org> In-Reply-To: <20180417155645.868055442@linuxfoundation.org> References: <20180417155645.868055442@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mark Rutland From: Will Deacon commit d68e3ba5303f7e1099f51fdcd155f5263da8569b upstream. Entry into recent versions of ARM Trusted Firmware will invalidate the CPU branch predictor state in order to protect against aliasing attacks. This patch exposes the PSCI "VERSION" function via psci_ops, so that it can be invoked outside of the PSCI driver where necessary. Acked-by: Lorenzo Pieralisi Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas Signed-off-by: Mark Rutland [v4.9 backport] Tested-by: Greg Hackmann Signed-off-by: Greg Kroah-Hartman --- drivers/firmware/psci.c | 2 ++ include/linux/psci.h | 1 + 2 files changed, 3 insertions(+) --- a/drivers/firmware/psci.c +++ b/drivers/firmware/psci.c @@ -496,6 +496,8 @@ static void __init psci_init_migrate(voi static void __init psci_0_2_set_functions(void) { pr_info("Using standard PSCI v0.2 function IDs\n"); + psci_ops.get_version = psci_get_version; + psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_FN_NATIVE(0_2, CPU_SUSPEND); psci_ops.cpu_suspend = psci_cpu_suspend; --- a/include/linux/psci.h +++ b/include/linux/psci.h @@ -26,6 +26,7 @@ int psci_cpu_init_idle(unsigned int cpu) int psci_cpu_suspend_enter(unsigned long index); struct psci_operations { + u32 (*get_version)(void); int (*cpu_suspend)(u32 state, unsigned long entry_point); int (*cpu_off)(u32 state); int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);