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Message-Id: <1472762024-88771-7-git-send-email-srinivas.pandruvada@linux.intel.com>
Date: Thu, 1 Sep 2016 13:33:42 -0700
From: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To: rjw@...ysocki.net, tglx@...utronix.de, mingo@...hat.com,
bp@...e.de, peterz@...radead.org
Cc: x86@...nel.org, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
tim.c.chen@...ux.intel.com,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH v2 6/8] acpi: bus: Enable HWP CPPC objects
Need to set platform wide _OSC bits to enable CPPC and CPPC version 2.
If platform supports CPPC, then BIOS exposess CPPC tables.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
---
drivers/acpi/bus.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 85b7d07..1001b92 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -330,6 +330,11 @@ static void acpi_bus_osc_support(void)
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
+ if (IS_ENABLED(CONFIG_X86) && boot_cpu_has(X86_FEATURE_HWP)) {
+ capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT;
+ capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT;
+ }
+
if (!ghes_disable)
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
--
2.7.4
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