cpufreq: intel_pstate: EPB with performance governor

["Doug Smythies" <dsmythies@telus.net>]

Hi Srinivas and/or Rafael,

Can you please confirm or deny that an older
commit:

commit 8442885fca09b2d26375b9fe507759879a6f661e
cpufreq: intel_pstate: Set EPP/EPB to 0 in performance mode

has been superseded by:

arch/x86/kernel/cpu/intel_epb.c

and that now there is no way to have some default EPB (say 6) for
governors other than performance, while still getting an EPB of 0
for the performance governor.

... Doug

Additional notes:
Both my test computers have EPB as 0 upon startup,
But I also tried this:

diff --git a/arch/x86/kernel/cpu/intel_epb.c b/arch/x86/kernel/cpu/intel_epb.c
index f4dd73396f28..b536e381cd56 100644
--- a/arch/x86/kernel/cpu/intel_epb.c
+++ b/arch/x86/kernel/cpu/intel_epb.c
@@ -74,7 +74,8 @@ static int intel_epb_save(void)

 static void intel_epb_restore(void)
 {
-       u64 val = this_cpu_read(saved_epb);
+//     u64 val = this_cpu_read(saved_epb);
+       u64 val = 6;
        u64 epb;

        rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);

which did get rid of this message:
kernel: [    0.102158] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'