[PATCH 8/8] cpupower: Add cpuid cap flag for MSR_AMD_HWCR support

[Nathan Fontenot]

Remove the family check for accessing the MSR_AMD_HWCR MSR and replace
it with a cpupower cap flag.

This update also allows for the removal of the local cpupower_cpu_info
variable in cpufreq_has_boost_support() since we no longer need it to
check the family.

Signed-off-by: Nathan Fontenot <nathan.fonte...@amd.com>
---
 tools/power/cpupower/utils/helpers/cpuid.c   |    6 +++++-
 tools/power/cpupower/utils/helpers/helpers.h |    1 +
 tools/power/cpupower/utils/helpers/misc.c    |    7 +------
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/power/cpupower/utils/helpers/cpuid.c 
b/tools/power/cpupower/utils/helpers/cpuid.c
index db2e88ceb67b..72eb43593180 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c
@@ -129,9 +129,13 @@ int get_cpu_info(struct cpupower_cpu_info *cpu_info)
        if (cpu_info->vendor == X86_VENDOR_AMD ||
            cpu_info->vendor == X86_VENDOR_HYGON) {
                if (ext_cpuid_level >= 0x80000007) {
-                       if (cpuid_edx(0x80000007) & (1 << 9))
+                       if (cpuid_edx(0x80000007) & (1 << 9)) {
                                cpu_info->caps |= CPUPOWER_CAP_AMD_CPB;
 
+                               if (cpu_info->family >= 0x17)
+                                       cpu_info->caps |= 
CPUPOWER_CAP_AMD_CPB_MSR;
+                       }
+
                        if ((cpuid_edx(0x80000007) & (1 << 7)) &&
                            cpu_info->family != 0x14) {
                                /* HW pstate was not implemented in family 0x14 
*/
diff --git a/tools/power/cpupower/utils/helpers/helpers.h 
b/tools/power/cpupower/utils/helpers/helpers.h
index 8a0c11c6ec63..33ffacee7fcb 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -72,6 +72,7 @@ enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, 
X86_VENDOR_INTEL,
 #define CPUPOWER_CAP_AMD_RDPRU         0x00000080
 #define CPUPOWER_CAP_AMD_HW_PSTATE     0x00000100
 #define CPUPOWER_CAP_AMD_PSTATEDEF     0x00000200
+#define CPUPOWER_CAP_AMD_CPB_MSR       0x00000400
 
 #define CPUPOWER_AMD_CPBDIS            0x02000000
 
diff --git a/tools/power/cpupower/utils/helpers/misc.c 
b/tools/power/cpupower/utils/helpers/misc.c
index f9bcce9c72d5..fc6e34511721 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -16,16 +16,11 @@
 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;
 
-       ret = get_cpu_info(&cpu_info);
-       if (ret)
-               return ret;
-
        if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB) {
                *support = 1;
 
@@ -34,7 +29,7 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, 
int *active,
                 * has Hardware determined variable increments instead.
                 */
 
-               if (cpu_info.family == 0x17 || cpu_info.family == 0x18) {
+               if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB_MSR) {
                        if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {
                                if (!(val & CPUPOWER_AMD_CPBDIS))
                                        *active = 1;