linux_dsm_epyc7002/arch/x86/kernel/acpi
Li, Aubrey 7486341a98 x86/platform, acpi: Bypass legacy PIC and PIT in ACPI hardware reduced mode
On a platform in ACPI Hardware-reduced mode, the legacy PIC and
PIT may not be initialized even though they may be present in
silicon. Touching these legacy components causes unexpected
results on the system.

On the Bay Trail-T(ASUS-T100) platform, touching these legacy
components blocks platform hardware low idle power state(S0ix)
during system suspend. So we should bypass them in ACPI hardware
reduced mode.

Suggested-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Li Aubrey <aubrey.li@linux.intel.com>
Cc: <alan@linux.intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Link: http://lkml.kernel.org/r/54FFF81C.20703@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-12 12:07:13 +01:00
..
apei.c acpi, apei, ghes: Factor out ioremap virtual memory for IRQ and NMI context. 2014-07-22 15:05:06 -07:00
boot.c x86/platform, acpi: Bypass legacy PIC and PIT in ACPI hardware reduced mode 2015-03-12 12:07:13 +01:00
cstate.c ACPI idle: permit sparse C-state sub-state numbers 2014-02-19 17:33:18 -05:00
Makefile apei, mce: Factor out APEI architecture specific MCE calls. 2014-07-22 15:05:06 -07:00
sleep.c x86: Store a per-cpu shadow copy of CR4 2015-02-04 12:10:42 +01:00
sleep.h ACPICA: Cleanup asmlinkage for ACPICA APIs. 2013-10-31 14:37:35 +01:00
wakeup_32.S ACPICA: Cleanup asmlinkage for ACPICA APIs. 2013-10-31 14:37:35 +01:00
wakeup_64.S ACPICA: Cleanup asmlinkage for ACPICA APIs. 2013-10-31 14:37:35 +01:00