Release 4.15 tools/power/cpupower/utils/helpers/misc.c

// 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) {
			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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Dominik Brodowski
99
64.71%
1
25.00%
Sherry Hurwitz
50
32.68%
2
50.00%
Thomas Renninger
4
2.61%
1
25.00%
Total
153
100.00%
4
100.00%

#endif /* #if defined(__i386__) || defined(__x86_64__) */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Dominik Brodowski
116
66.29%
1
20.00%
Sherry Hurwitz
54
30.86%
2
40.00%
Thomas Renninger
4
2.29%
1
20.00%
Greg Kroah-Hartman
1
0.57%
1
20.00%
Total
175
100.00%
5
100.00%
Directory: tools/power/cpupower/utils/helpers

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