Clearwater Forest (CWF) SoC has the same C-states as Sierra Forest (SRF)
SoC.  Add CWF support by re-using the SRF C-states table.

Note: it is expected that CWF C-states will have same or very similar
characteristics as SRF C-states (latency and target residency).

However, there is a possibility that the characteristics will end up
being different enough when the CWF platform development is finished.
In that case, a separate CWF C-states table will be created and populated
with the CWF-specific characteristics (latency and target residency).

Signed-off-by: Artem Bityutskiy <artem.bityuts...@linux.intel.com>
Link: 
https://patch.msgid.link/20241203130306.1559024-1-artem.bityuts...@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
eeed4bfbe9b9
Signed-off-by: Jan Beulich <jbeul...@suse.com>

--- a/xen/arch/x86/cpu/mwait-idle.c
+++ b/xen/arch/x86/cpu/mwait-idle.c
@@ -1350,6 +1350,7 @@ static const struct x86_cpu_id intel_idl
        ICPU(ATOM_TREMONT_D,            snr),
        ICPU(ATOM_CRESTMONT,            grr),
        ICPU(ATOM_CRESTMONT_X,          srf),
+       ICPU(ATOM_DARKMONT_X,           srf),
        {}
 };
 


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