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| author | David Dai <davidai@google.com> | 2024-09-18 17:08:33 -0700 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2024-10-29 12:05:14 +0530 |
| commit | 4fd06a5358e0d888d1bf23d274971ea7d1f45aad (patch) | |
| tree | 014938156f36840f3aa89efd9b5825507af39329 /drivers/cpufreq/Makefile | |
| parent | 984638e4430b75bd38dba723e42aad4c748fed70 (diff) | |
| download | linux-next-4fd06a5358e0d888d1bf23d274971ea7d1f45aad.tar.gz linux-next-4fd06a5358e0d888d1bf23d274971ea7d1f45aad.zip | |
cpufreq: add virtual-cpufreq driver
Introduce a virtualized cpufreq driver for guest kernels to improve
performance and power of workloads within VMs.
This driver does two main things:
1. Sends the frequency of vCPUs as a hint to the host. The host uses the
hint to schedule the vCPU threads and decide physical CPU frequency.
2. If a VM does not support a virtualized FIE(like AMUs), it queries the
host CPU frequency by reading a MMIO region of a virtual cpufreq device
to update the guest's frequency scaling factor periodically. This enables
accurate Per-Entity Load Tracking for tasks running in the guest.
Co-developed-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: David Dai <davidai@google.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq/Makefile')
| -rw-r--r-- | drivers/cpufreq/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 0f184031dd12..10d7d6e55da8 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_ATTR_SET) += cpufreq_governor_attr_set.o obj-$(CONFIG_CPUFREQ_DT) += cpufreq-dt.o obj-$(CONFIG_CPUFREQ_DT_PLATDEV) += cpufreq-dt-platdev.o +obj-$(CONFIG_CPUFREQ_VIRT) += virtual-cpufreq.o # Traces CFLAGS_amd-pstate-trace.o := -I$(src) |