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powercap: Add AMD Fam17h RAPL support 

Enable AMD Fam17h RAPL support for the power capping framework.

The support is as per AMD Fam17h Model31h (Zen2) and model 00-ffh
(Zen1) PPR.

Tested by comparing the results of following two sysfs entries and the
values directly read from corresponding MSRs via /dev/cpu/[x]/msr:
  /sys/class/powercap/intel-rapl/intel-rapl:0/energy_uj
  /sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:0/energy_uj

Signed-off-by: Victor Ding <victording@google.com>
Acked-by: Kim Phillips <kim.phillips@amd.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Victor Ding 2020-10-27 07:23:56 +00:00 committed by Rafael J. Wysocki
parent a2c32fa736
commit 43756a2989
3 changed files with 26 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/include/asm/msr-index.h
View File

@ -327,6 +327,7 @@
#define MSR_PP1_POLICY 0x00000642
#define MSR_AMD_RAPL_POWER_UNIT 0xc0010299
#define MSR_AMD_CORE_ENERGY_STATUS 0xc001029a
#define MSR_AMD_PKG_ENERGY_STATUS 0xc001029b
/* Config TDP MSRs */

6
drivers/powercap/intel_rapl_common.c
View File

@ -1011,6 +1011,10 @@ static const struct rapl_defaults rapl_defaults_cht = {
.compute_time_window = rapl_compute_time_window_atom,
};
static const struct rapl_defaults rapl_defaults_amd = {
.check_unit = rapl_check_unit_core,
};
static const struct x86_cpu_id rapl_ids[] __initconst = {
X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE, &rapl_defaults_core),
X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE_X, &rapl_defaults_core),
@ -1061,6 +1065,8 @@ static const struct x86_cpu_id rapl_ids[] __initconst = {
X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNL, &rapl_defaults_hsw_server),
X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNM, &rapl_defaults_hsw_server),
X86_MATCH_VENDOR_FAM(AMD, 0x17, &rapl_defaults_amd),
{}
};
MODULE_DEVICE_TABLE(x86cpu, rapl_ids);

20
drivers/powercap/intel_rapl_msr.c
View File

@ -49,6 +49,14 @@ static struct rapl_if_priv rapl_msr_priv_intel = {
.limits[RAPL_DOMAIN_PLATFORM] = 2,
};
static struct rapl_if_priv rapl_msr_priv_amd = {
.reg_unit = MSR_AMD_RAPL_POWER_UNIT,
.regs[RAPL_DOMAIN_PACKAGE] = {
0, MSR_AMD_PKG_ENERGY_STATUS, 0, 0, 0 },
.regs[RAPL_DOMAIN_PP0] = {
0, MSR_AMD_CORE_ENERGY_STATUS, 0, 0, 0 },
};
/* Handles CPU hotplug on multi-socket systems.
* If a CPU goes online as the first CPU of the physical package
* we add the RAPL package to the system. Similarly, when the last
@ -138,7 +146,17 @@ static int rapl_msr_probe(struct platform_device *pdev)
const struct x86_cpu_id *id = x86_match_cpu(pl4_support_ids);
int ret;
rapl_msr_priv = &rapl_msr_priv_intel;
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_INTEL:
rapl_msr_priv = &rapl_msr_priv_intel;
break;
case X86_VENDOR_AMD:
rapl_msr_priv = &rapl_msr_priv_amd;
break;
default:
pr_err("intel-rapl does not support CPU vendor %d\n", boot_cpu_data.x86_vendor);
return -ENODEV;
}
rapl_msr_priv->read_raw = rapl_msr_read_raw;
rapl_msr_priv->write_raw = rapl_msr_write_raw;