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| author | David Dai <[email protected]> | 2024-09-19 00:08:33 +0000 |
|---|---|---|
| committer | Viresh Kumar <[email protected]> | 2024-10-29 06:35:14 +0000 |
| commit | 4fd06a5358e0d888d1bf23d274971ea7d1f45aad (patch) | |
| tree | 014938156f36840f3aa89efd9b5825507af39329 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | dt-bindings: cpufreq: add virtual cpufreq device (diff) | |
| download | kernel-4fd06a5358e0d888d1bf23d274971ea7d1f45aad.tar.gz kernel-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 <[email protected]>
Signed-off-by: Saravana Kannan <[email protected]>
Signed-off-by: David Dai <[email protected]>
Signed-off-by: Viresh Kumar <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions