soc/intel/dnv_ns: enable uCode PM Timer emulation
Denverton-NS supports uCode PM Timer emulation, according to Intel
doc#558579 rev2.2. Thus, enable it.
Change-Id: I21f55816da9f5e240fdf01a0e92b67b09ef38599
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57944
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/soc/intel/denverton_ns/Kconfig b/src/soc/intel/denverton_ns/Kconfig
index c657285..a578a71 100644
--- a/src/soc/intel/denverton_ns/Kconfig
+++ b/src/soc/intel/denverton_ns/Kconfig
@@ -15,6 +15,7 @@
def_bool y
select ARCH_X86
select BOOT_DEVICE_SUPPORTS_WRITES
+ select CPU_SUPPORTS_PM_TIMER_EMULATION
select DEBUG_GPIO
select SOC_INTEL_COMMON
select SOC_INTEL_COMMON_RESET
diff --git a/src/soc/intel/denverton_ns/cpu.c b/src/soc/intel/denverton_ns/cpu.c
index 95f164d..6063548 100644
--- a/src/soc/intel/denverton_ns/cpu.c
+++ b/src/soc/intel/denverton_ns/cpu.c
@@ -94,6 +94,8 @@
msr = rdmsr(IA32_MISC_ENABLE);
msr.lo |= SPEED_STEP_ENABLE_BIT;
wrmsr(IA32_MISC_ENABLE, msr);
+
+ enable_pm_timer_emulation();
}
static struct device_operations cpu_dev_ops = {