diff options
| author | Shaohua Li <shaohua.li@intel.com> | 2009-06-02 10:51:58 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-15 09:40:07 -0700 |
| commit | ab726ea2b8ceb78da2ed2e9fd6a60444f01e5d0d (patch) | |
| tree | 465260f0ae681d07947068f70126d3c1939b65a5 /drivers | |
| parent | 134ab0d6e68c12a684e114b1e27f7dbb187bacbf (diff) | |
cpuidle: make AMC C1E work in processor_idle
commit 87ad57bacb25c3f24c54f142ef445f68277705f0 upstream
When AMD C1E is enabled, local APIC timer will stop even in C1. This patch uses
broadcast ipi to replace local APIC timer in C1.
http://bugzilla.kernel.org/show_bug.cgi?id=13233
[ impact: avoid boot hang in AMD CPU with C1E enabled ]
Tested-by: Dmitry Lyzhyn <thisistempbox@yahoo.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 7bc22a471fe3..1a56bfb44140 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -212,6 +212,9 @@ static void acpi_timer_check_state(int state, struct acpi_processor *pr, struct acpi_processor_power *pwr = &pr->power; u8 type = local_apic_timer_c2_ok ? ACPI_STATE_C3 : ACPI_STATE_C2; + if (boot_cpu_has(X86_FEATURE_AMDC1E)) + type = ACPI_STATE_C1; + /* * Check, if one of the previous states already marked the lapic * unstable @@ -648,6 +651,7 @@ static int acpi_processor_power_verify(struct acpi_processor *pr) switch (cx->type) { case ACPI_STATE_C1: cx->valid = 1; + acpi_timer_check_state(i, pr, cx); break; case ACPI_STATE_C2: @@ -871,12 +875,14 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev, return 0; } + acpi_state_timer_broadcast(pr, cx, 1); t1 = inl(acpi_gbl_FADT.xpm_timer_block.address); acpi_idle_do_entry(cx); t2 = inl(acpi_gbl_FADT.xpm_timer_block.address); local_irq_enable(); cx->usage++; + acpi_state_timer_broadcast(pr, cx, 0); return ticks_elapsed_in_us(t1, t2); } |