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// SPDX-License-Identifier: GPL-2.0
#if defined(__i386__) || defined(__x86_64__)
#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;
ret = get_cpu_info(&cpu_info);
if (ret)
return ret;
if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CBP) {
*support = 1;
/* 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 || cpu_info.family == 0x18) {
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;
}
#endif /* #if defined(__i386__) || defined(__x86_64__) */
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