diff mbox

[Replacement,v2,6/8] acpi: bus: Enable HWP CPPC objects

Message ID 1472775242-10268-1-git-send-email-srinivas.pandruvada@linux.intel.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

srinivas pandruvada Sept. 2, 2016, 12:14 a.m. UTC
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@linux.intel.com>
---
Replacement: Fix error reported by 0-day for compile issue on ARM

 drivers/acpi/bus.c | 7 +++++++
 1 file changed, 7 insertions(+)

Comments

Peter Zijlstra Sept. 8, 2016, 8:10 a.m. UTC | #1
On Thu, Sep 01, 2016 at 05:14:02PM -0700, Srinivas Pandruvada wrote:
> 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@linux.intel.com>
> ---
> Replacement: Fix error reported by 0-day for compile issue on ARM

Oh, here it is.. I hadn't seen it. Please send such patches in-thread as
a reply to the patch they replace.
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diff mbox

Patch

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)))