From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Pandruvada Subject: [PATCH 5/5] acpi: bus: Enable HWP CPPC objects Date: Wed, 10 Aug 2016 17:17:26 -0700 Message-ID: <1470874646-70570-6-git-send-email-srinivas.pandruvada@linux.intel.com> References: <1470874646-70570-1-git-send-email-srinivas.pandruvada@linux.intel.com> Return-path: Received: from mga04.intel.com ([192.55.52.120]:33756 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752666AbcHKARh (ORCPT ); Wed, 10 Aug 2016 20:17:37 -0400 In-Reply-To: <1470874646-70570-1-git-send-email-srinivas.pandruvada@linux.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: rjw@rjwysocki.net, viresh.kumar@linaro.org Cc: linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, ashwin.chaugule@linaro.org, Srinivas Pandruvada Need to set platform wide _OSC bits CPC version 1 and version 2 bits so that BIOS presents CPPC objects. Even though the cppc_acpi supports only version 2, need to set both _OSC bits for version 1 and version 2, otherwise BIOS ignore _OSC settings. Signed-off-by: Srinivas Pandruvada --- drivers/acpi/bus.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 85b7d07..61643a5 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -330,6 +330,13 @@ static void acpi_bus_osc_support(void) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; +#ifdef CONFIG_X86 + if (boot_cpu_has(X86_FEATURE_HWP)) { + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; + } +#endif + if (!ghes_disable) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) -- 2.7.4