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authorVictor Ding <victording@google.com>2020-10-27 10:23:56 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-11-10 21:59:07 +0300
commit43756a298928c9a4e8201baaeb205c0c103728af (patch)
treec108ae7f7dc37d9d2467b87b956ee0eba354e219 /drivers/powercap
parenta2c32fa736a590a7ab6e9601066a6772ae09869b (diff)
downloadlinux-43756a298928c9a4e8201baaeb205c0c103728af.tar.xz
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>
Diffstat (limited to 'drivers/powercap')
-rw-r--r--drivers/powercap/intel_rapl_common.c6
-rw-r--r--drivers/powercap/intel_rapl_msr.c20
2 files changed, 25 insertions, 1 deletions
diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
index 70d6d52bc1e2..1ecd09424445 100644
--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -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);
diff --git a/drivers/powercap/intel_rapl_msr.c b/drivers/powercap/intel_rapl_msr.c
index a819b3b89b2f..78213d4b5b16 100644
--- a/drivers/powercap/intel_rapl_msr.c
+++ b/drivers/powercap/intel_rapl_msr.c
@@ -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;