acpi/bus: Set _OSC for diverse core support

Set the OSC_SB_CPC_DIVERSE_HIGH_SUPPORT (bit 12) to enable diverse
core support.

This is required to enable the BIOS support of the Intel Turbo Boost Max
Technology 3.0 feature.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Cc: linux-pm@vger.kernel.org
Cc: peterz@infradead.org
Cc: jolsa@redhat.com
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: bp@suse.de
Link: http://lkml.kernel.org/r/a023623a727e86040a1715797055f6402caefd7e.1479844244.git.tim.c.chen@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 2f381ba1e1f2..806db0d6e6e8 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -338,6 +338,9 @@ static void acpi_bus_osc_support(void)
         }
 #endif
 
+        if (IS_ENABLED(CONFIG_SCHED_ITMT))
+                capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT;
+
         if (!ghes_disable)
                 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
         if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 61a3d90f32b3..051023756520 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -469,6 +469,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 #define OSC_SB_CPCV2_SUPPORT                    0x00000040
 #define OSC_SB_PCLPI_SUPPORT                    0x00000080
 #define OSC_SB_OSLPI_SUPPORT                    0x00000100
+#define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT         0x00001000
 
 extern bool osc_sb_apei_support_acked;
 extern bool osc_pc_lpi_support_confirmed;