Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752852AbaKXHw0 (ORCPT ); Mon, 24 Nov 2014 02:52:26 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:22624 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752176AbaKXHwY (ORCPT ); Mon, 24 Nov 2014 02:52:24 -0500 From: Ethan Zhao To: linda.knippers@hp.com, viresh.kumar@linaro.org, rjw@rjwysocki.net, corbet@lwn.net, dirk.j.brandewie@intel.com Cc: linux-doc@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, ethan.kernel@gmail.com, Ethan Zhao Subject: [PATCH 2/2 v2] intel_pstate: add kernel parameter to enable loading on Sun X86 servers. Date: Mon, 24 Nov 2014 16:50:58 +0900 Message-Id: <1416815458-25312-3-git-send-email-ethan.zhao@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1416815458-25312-1-git-send-email-ethan.zhao@oracle.com> References: <1416815458-25312-1-git-send-email-ethan.zhao@oracle.com> X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To force loading on Oracle Sun X86 servers, provide one kernel command line parameter intel_pstate = onora For those who be aware of the risk doing so. Signed-off-by: Ethan Zhao v2: change the command line parameter naming to specific to Oracle Sun servers. --- Documentation/kernel-parameters.txt | 3 +++ drivers/cpufreq/intel_pstate.c | 6 +++++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 479f332..e4b1b81 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1446,6 +1446,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. disable Do not enable intel_pstate as the default scaling driver for the supported processors + onora + Enable loading intel_pstate on Oracle Sun Servers(X86). + only for those who be aware of the risk. intremap= [X86-64, Intel-IOMMU] on enable Interrupt Remapping (default) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index dacc15a..f28c725 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -866,6 +866,7 @@ static struct cpufreq_driver intel_pstate_driver = { }; static int __initdata no_load; +static unsigned int load_on_sun; static int intel_pstate_msrs_not_valid(void) { @@ -987,7 +988,8 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) return true; } if (!strncmp(hdr.oem_id, vendor_info[1].oem_id, ACPI_OEM_ID_SIZE) && - intel_pstate_has_acpi_ppc()) + intel_pstate_has_acpi_ppc() && + !load_on_sun) return true; return false; @@ -1061,6 +1063,8 @@ static int __init intel_pstate_setup(char *str) if (!strcmp(str, "disable")) no_load = 1; + if (!strcmp(str, "onora")) + load_on_sun = 1; return 0; } early_param("intel_pstate", intel_pstate_setup); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/