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Laura Abbott authored
MSR_IA32_ENERGY_PERF_BIAS is lost after suspend/resume: x86_energy_perf_policy -r before cpu0: 0x0000000000000006 cpu1: 0x0000000000000006 cpu2: 0x0000000000000006 cpu3: 0x0000000000000006 cpu4: 0x0000000000000006 cpu5: 0x0000000000000006 cpu6: 0x0000000000000006 cpu7: 0x0000000000000006 after cpu0: 0x0000000000000000 cpu1: 0x0000000000000006 cpu2: 0x0000000000000006 cpu3: 0x0000000000000006 cpu4: 0x0000000000000006 cpu5: 0x0000000000000006 cpu6: 0x0000000000000006 cpu7: 0x0000000000000006 Resulting in inconsistent energy policy settings across CPUs. This register is set via init_intel() at bootup. During resume, the secondary CPUs are brought online again and init_intel() is callled which re-initializes the register. The boot CPU however never reinitializes the register. Add a syscore callback to reinitialize the register for the boot CPU. Signed-off-by:
Laura Abbott <labbott@fedoraproject.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1437428878-4105-1-git-send-email-labbott@fedoraproject.orgSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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