cpupower: Add support for new AMD family 0x17

Add support for new AMD family 0x17
- Add bit field changes to the msr_pstate structure
- Add the new formula for the  calculation of cof
- Changed method to access to CpbDis

Signed-off-by: Sherry Hurwitz <sherry.hurwitz@amd.com>
Acked-by: Thomas Renninger <trenn@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 19 insertions, 3 deletions

diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 6952a6abd1e5..601d719d4e60 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -2,11 +2,14 @@
 
 #include "helpers/helpers.h"
 
+#define MSR_AMD_HWCR	0xc0010015
+
 int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
 			int *states)
 {
 	struct cpupower_cpu_info cpu_info;
 	int ret;
+	unsigned long long val;
 
 	*support = *active = *states = 0;
 
@@ -16,9 +19,22 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
 
 	if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CBP) {
 		*support = 1;
-		ret = amd_pci_get_num_boost_states(active, states);
-		if (ret)
-			return ret;
+
+		/* AMD Family 0x17 does not utilize PCI D18F4 like prior
+		 * families and has no fixed discrete boost states but
+		 * has Hardware determined variable increments instead.
+		 */
+
+		if (cpu_info.family == 0x17) {
+			if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {
+				if (!(val & CPUPOWER_AMD_CPBDIS))
+					*active = 1;
+			}
+		} else {
+			ret = amd_pci_get_num_boost_states(active, states);
+			if (ret)
+				return ret;
+		}
 	} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA)
 		*support = *active = 1;
 	return 0;