Loading Documentation/kernel-parameters.txt +26 −19 Original line number Diff line number Diff line Loading @@ -150,16 +150,20 @@ and is between 256 and 4096 characters. It is defined in the file default: 0 acpi_sleep= [HW,ACPI] Sleep options Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig, old_ordering } See Documentation/power/video.txt for s3_bios and s3_mode. Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig, old_ordering, s4_nonvs } See Documentation/power/video.txt for information on s3_bios and s3_mode. s3_beep is for debugging; it makes the PC's speaker beep as soon as the kernel's real-mode entry point is called. s4_nohwsig prevents ACPI hardware signature from being used during resume from hibernation. old_ordering causes the ACPI 1.0 ordering of the _PTS control method, wrt putting devices into low power states, to be enforced (the ACPI 2.0 ordering of _PTS is used by default). control method, with respect to putting devices into low power states, to be enforced (the ACPI 2.0 ordering of _PTS is used by default). s4_nonvs prevents the kernel from saving/restoring the ACPI NVS memory during hibernation. acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode Format: { level | edge | high | low } Loading Loading @@ -194,7 +198,7 @@ and is between 256 and 4096 characters. It is defined in the file acpi_skip_timer_override [HW,ACPI] Recognize and ignore IRQ0/pin2 Interrupt Override. For broken nForce2 BIOS resulting in XT-PIC timer. acpi_use_timer_override [HW,ACPI} acpi_use_timer_override [HW,ACPI] Use timer override. For some broken Nvidia NF5 boards that require a timer override, but don't have HPET Loading Loading @@ -861,17 +865,19 @@ and is between 256 and 4096 characters. It is defined in the file See Documentation/ide/ide.txt. idle= [X86] Format: idle=poll or idle=mwait, idle=halt, idle=nomwait Poll forces a polling idle loop that can slightly improves the performance of waking up a idle CPU, but will use a lot of power and make the system run hot. Not recommended. idle=mwait. On systems which support MONITOR/MWAIT but the kernel chose to not use it because it doesn't save as much power as a normal idle loop use the MONITOR/MWAIT idle loop anyways. Performance should be the same as idle=poll. idle=halt. Halt is forced to be used for CPU idle. Format: idle=poll, idle=mwait, idle=halt, idle=nomwait Poll forces a polling idle loop that can slightly improve the performance of waking up a idle CPU, but will use a lot of power and make the system run hot. Not recommended. idle=mwait: On systems which support MONITOR/MWAIT but the kernel chose to not use it because it doesn't save as much power as a normal idle loop, use the MONITOR/MWAIT idle loop anyways. Performance should be the same as idle=poll. idle=halt: Halt is forced to be used for CPU idle. In such case C2/C3 won't be used again. idle=nomwait. Disable mwait for CPU C-states idle=nomwait: Disable mwait for CPU C-states ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem Claim all unknown PCI IDE storage controllers. Loading Loading @@ -1053,8 +1059,8 @@ and is between 256 and 4096 characters. It is defined in the file lapic [X86-32,APIC] Enable the local APIC even if BIOS disabled it. lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in C2 power state. lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in C2 power state. libata.dma= [LIBATA] DMA control libata.dma=0 Disable all PATA and SATA DMA Loading Loading @@ -2242,7 +2248,8 @@ and is between 256 and 4096 characters. It is defined in the file thermal.psv= [HW,ACPI] -1: disable all passive trip points <degrees C>: override all passive trip points to this value <degrees C>: override all passive trip points to this value thermal.tzp= [HW,ACPI] Specify global default ACPI thermal zone polling rate Loading arch/x86/kernel/acpi/sleep.c +2 −0 Original line number Diff line number Diff line Loading @@ -159,6 +159,8 @@ static int __init acpi_sleep_setup(char *str) #endif if (strncmp(str, "old_ordering", 12) == 0) acpi_old_suspend_ordering(); if (strncmp(str, "s4_nonvs", 8) == 0) acpi_s4_no_nvs(); str = strchr(str, ','); if (str != NULL) str += strspn(str, ", \t"); Loading arch/x86/kernel/e820.c +21 −0 Original line number Diff line number Diff line Loading @@ -665,6 +665,27 @@ void __init e820_mark_nosave_regions(unsigned long limit_pfn) } #endif #ifdef CONFIG_HIBERNATION /** * Mark ACPI NVS memory region, so that we can save/restore it during * hibernation and the subsequent resume. */ static int __init e820_mark_nvs_memory(void) { int i; for (i = 0; i < e820.nr_map; i++) { struct e820entry *ei = &e820.map[i]; if (ei->type == E820_NVS) hibernate_nvs_register(ei->addr, ei->size); } return 0; } core_initcall(e820_mark_nvs_memory); #endif /* * Early reserved memory areas. */ Loading drivers/acpi/main.c +59 −8 Original line number Diff line number Diff line Loading @@ -101,6 +101,19 @@ void __init acpi_old_suspend_ordering(void) * cases. */ static bool set_sci_en_on_resume; /* * The ACPI specification wants us to save NVS memory regions during hibernation * and to restore them during the subsequent resume. However, it is not certain * if this mechanism is going to work on all machines, so we allow the user to * disable this mechanism using the 'acpi_sleep=s4_nonvs' kernel command line * option. */ static bool s4_no_nvs; void __init acpi_s4_no_nvs(void) { s4_no_nvs = true; } /** * acpi_pm_disable_gpes - Disable the GPEs. Loading Loading @@ -394,9 +407,25 @@ void __init acpi_no_s4_hw_signature(void) static int acpi_hibernation_begin(void) { int error; error = s4_no_nvs ? 0 : hibernate_nvs_alloc(); if (!error) { acpi_target_sleep_state = ACPI_STATE_S4; acpi_sleep_tts_switch(acpi_target_sleep_state); return 0; } return error; } static int acpi_hibernation_pre_snapshot(void) { int error = acpi_pm_prepare(); if (!error) hibernate_nvs_save(); return error; } static int acpi_hibernation_enter(void) Loading @@ -417,6 +446,12 @@ static int acpi_hibernation_enter(void) return ACPI_SUCCESS(status) ? 0 : -EFAULT; } static void acpi_hibernation_finish(void) { hibernate_nvs_free(); acpi_pm_finish(); } static void acpi_hibernation_leave(void) { /* Loading @@ -432,6 +467,8 @@ static void acpi_hibernation_leave(void) "cannot resume!\n"); panic("ACPI S4 hardware signature mismatch"); } /* Restore the NVS memory area */ hibernate_nvs_restore(); } static void acpi_pm_enable_gpes(void) Loading @@ -442,8 +479,8 @@ static void acpi_pm_enable_gpes(void) static struct platform_hibernation_ops acpi_hibernation_ops = { .begin = acpi_hibernation_begin, .end = acpi_pm_end, .pre_snapshot = acpi_pm_prepare, .finish = acpi_pm_finish, .pre_snapshot = acpi_hibernation_pre_snapshot, .finish = acpi_hibernation_finish, .prepare = acpi_pm_prepare, .enter = acpi_hibernation_enter, .leave = acpi_hibernation_leave, Loading @@ -469,8 +506,22 @@ static int acpi_hibernation_begin_old(void) error = acpi_sleep_prepare(ACPI_STATE_S4); if (!error) { if (!s4_no_nvs) error = hibernate_nvs_alloc(); if (!error) acpi_target_sleep_state = ACPI_STATE_S4; } return error; } static int acpi_hibernation_pre_snapshot_old(void) { int error = acpi_pm_disable_gpes(); if (!error) hibernate_nvs_save(); return error; } Loading @@ -481,8 +532,8 @@ static int acpi_hibernation_begin_old(void) static struct platform_hibernation_ops acpi_hibernation_ops_old = { .begin = acpi_hibernation_begin_old, .end = acpi_pm_end, .pre_snapshot = acpi_pm_disable_gpes, .finish = acpi_pm_finish, .pre_snapshot = acpi_hibernation_pre_snapshot_old, .finish = acpi_hibernation_finish, .prepare = acpi_pm_disable_gpes, .enter = acpi_hibernation_enter, .leave = acpi_hibernation_leave, Loading include/linux/acpi.h +1 −0 Original line number Diff line number Diff line Loading @@ -270,6 +270,7 @@ int acpi_check_mem_region(resource_size_t start, resource_size_t n, #ifdef CONFIG_PM_SLEEP void __init acpi_no_s4_hw_signature(void); void __init acpi_old_suspend_ordering(void); void __init acpi_s4_no_nvs(void); #endif /* CONFIG_PM_SLEEP */ #else /* CONFIG_ACPI */ Loading Loading
Documentation/kernel-parameters.txt +26 −19 Original line number Diff line number Diff line Loading @@ -150,16 +150,20 @@ and is between 256 and 4096 characters. It is defined in the file default: 0 acpi_sleep= [HW,ACPI] Sleep options Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig, old_ordering } See Documentation/power/video.txt for s3_bios and s3_mode. Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig, old_ordering, s4_nonvs } See Documentation/power/video.txt for information on s3_bios and s3_mode. s3_beep is for debugging; it makes the PC's speaker beep as soon as the kernel's real-mode entry point is called. s4_nohwsig prevents ACPI hardware signature from being used during resume from hibernation. old_ordering causes the ACPI 1.0 ordering of the _PTS control method, wrt putting devices into low power states, to be enforced (the ACPI 2.0 ordering of _PTS is used by default). control method, with respect to putting devices into low power states, to be enforced (the ACPI 2.0 ordering of _PTS is used by default). s4_nonvs prevents the kernel from saving/restoring the ACPI NVS memory during hibernation. acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode Format: { level | edge | high | low } Loading Loading @@ -194,7 +198,7 @@ and is between 256 and 4096 characters. It is defined in the file acpi_skip_timer_override [HW,ACPI] Recognize and ignore IRQ0/pin2 Interrupt Override. For broken nForce2 BIOS resulting in XT-PIC timer. acpi_use_timer_override [HW,ACPI} acpi_use_timer_override [HW,ACPI] Use timer override. For some broken Nvidia NF5 boards that require a timer override, but don't have HPET Loading Loading @@ -861,17 +865,19 @@ and is between 256 and 4096 characters. It is defined in the file See Documentation/ide/ide.txt. idle= [X86] Format: idle=poll or idle=mwait, idle=halt, idle=nomwait Poll forces a polling idle loop that can slightly improves the performance of waking up a idle CPU, but will use a lot of power and make the system run hot. Not recommended. idle=mwait. On systems which support MONITOR/MWAIT but the kernel chose to not use it because it doesn't save as much power as a normal idle loop use the MONITOR/MWAIT idle loop anyways. Performance should be the same as idle=poll. idle=halt. Halt is forced to be used for CPU idle. Format: idle=poll, idle=mwait, idle=halt, idle=nomwait Poll forces a polling idle loop that can slightly improve the performance of waking up a idle CPU, but will use a lot of power and make the system run hot. Not recommended. idle=mwait: On systems which support MONITOR/MWAIT but the kernel chose to not use it because it doesn't save as much power as a normal idle loop, use the MONITOR/MWAIT idle loop anyways. Performance should be the same as idle=poll. idle=halt: Halt is forced to be used for CPU idle. In such case C2/C3 won't be used again. idle=nomwait. Disable mwait for CPU C-states idle=nomwait: Disable mwait for CPU C-states ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem Claim all unknown PCI IDE storage controllers. Loading Loading @@ -1053,8 +1059,8 @@ and is between 256 and 4096 characters. It is defined in the file lapic [X86-32,APIC] Enable the local APIC even if BIOS disabled it. lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in C2 power state. lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in C2 power state. libata.dma= [LIBATA] DMA control libata.dma=0 Disable all PATA and SATA DMA Loading Loading @@ -2242,7 +2248,8 @@ and is between 256 and 4096 characters. It is defined in the file thermal.psv= [HW,ACPI] -1: disable all passive trip points <degrees C>: override all passive trip points to this value <degrees C>: override all passive trip points to this value thermal.tzp= [HW,ACPI] Specify global default ACPI thermal zone polling rate Loading
arch/x86/kernel/acpi/sleep.c +2 −0 Original line number Diff line number Diff line Loading @@ -159,6 +159,8 @@ static int __init acpi_sleep_setup(char *str) #endif if (strncmp(str, "old_ordering", 12) == 0) acpi_old_suspend_ordering(); if (strncmp(str, "s4_nonvs", 8) == 0) acpi_s4_no_nvs(); str = strchr(str, ','); if (str != NULL) str += strspn(str, ", \t"); Loading
arch/x86/kernel/e820.c +21 −0 Original line number Diff line number Diff line Loading @@ -665,6 +665,27 @@ void __init e820_mark_nosave_regions(unsigned long limit_pfn) } #endif #ifdef CONFIG_HIBERNATION /** * Mark ACPI NVS memory region, so that we can save/restore it during * hibernation and the subsequent resume. */ static int __init e820_mark_nvs_memory(void) { int i; for (i = 0; i < e820.nr_map; i++) { struct e820entry *ei = &e820.map[i]; if (ei->type == E820_NVS) hibernate_nvs_register(ei->addr, ei->size); } return 0; } core_initcall(e820_mark_nvs_memory); #endif /* * Early reserved memory areas. */ Loading
drivers/acpi/main.c +59 −8 Original line number Diff line number Diff line Loading @@ -101,6 +101,19 @@ void __init acpi_old_suspend_ordering(void) * cases. */ static bool set_sci_en_on_resume; /* * The ACPI specification wants us to save NVS memory regions during hibernation * and to restore them during the subsequent resume. However, it is not certain * if this mechanism is going to work on all machines, so we allow the user to * disable this mechanism using the 'acpi_sleep=s4_nonvs' kernel command line * option. */ static bool s4_no_nvs; void __init acpi_s4_no_nvs(void) { s4_no_nvs = true; } /** * acpi_pm_disable_gpes - Disable the GPEs. Loading Loading @@ -394,9 +407,25 @@ void __init acpi_no_s4_hw_signature(void) static int acpi_hibernation_begin(void) { int error; error = s4_no_nvs ? 0 : hibernate_nvs_alloc(); if (!error) { acpi_target_sleep_state = ACPI_STATE_S4; acpi_sleep_tts_switch(acpi_target_sleep_state); return 0; } return error; } static int acpi_hibernation_pre_snapshot(void) { int error = acpi_pm_prepare(); if (!error) hibernate_nvs_save(); return error; } static int acpi_hibernation_enter(void) Loading @@ -417,6 +446,12 @@ static int acpi_hibernation_enter(void) return ACPI_SUCCESS(status) ? 0 : -EFAULT; } static void acpi_hibernation_finish(void) { hibernate_nvs_free(); acpi_pm_finish(); } static void acpi_hibernation_leave(void) { /* Loading @@ -432,6 +467,8 @@ static void acpi_hibernation_leave(void) "cannot resume!\n"); panic("ACPI S4 hardware signature mismatch"); } /* Restore the NVS memory area */ hibernate_nvs_restore(); } static void acpi_pm_enable_gpes(void) Loading @@ -442,8 +479,8 @@ static void acpi_pm_enable_gpes(void) static struct platform_hibernation_ops acpi_hibernation_ops = { .begin = acpi_hibernation_begin, .end = acpi_pm_end, .pre_snapshot = acpi_pm_prepare, .finish = acpi_pm_finish, .pre_snapshot = acpi_hibernation_pre_snapshot, .finish = acpi_hibernation_finish, .prepare = acpi_pm_prepare, .enter = acpi_hibernation_enter, .leave = acpi_hibernation_leave, Loading @@ -469,8 +506,22 @@ static int acpi_hibernation_begin_old(void) error = acpi_sleep_prepare(ACPI_STATE_S4); if (!error) { if (!s4_no_nvs) error = hibernate_nvs_alloc(); if (!error) acpi_target_sleep_state = ACPI_STATE_S4; } return error; } static int acpi_hibernation_pre_snapshot_old(void) { int error = acpi_pm_disable_gpes(); if (!error) hibernate_nvs_save(); return error; } Loading @@ -481,8 +532,8 @@ static int acpi_hibernation_begin_old(void) static struct platform_hibernation_ops acpi_hibernation_ops_old = { .begin = acpi_hibernation_begin_old, .end = acpi_pm_end, .pre_snapshot = acpi_pm_disable_gpes, .finish = acpi_pm_finish, .pre_snapshot = acpi_hibernation_pre_snapshot_old, .finish = acpi_hibernation_finish, .prepare = acpi_pm_disable_gpes, .enter = acpi_hibernation_enter, .leave = acpi_hibernation_leave, Loading
include/linux/acpi.h +1 −0 Original line number Diff line number Diff line Loading @@ -270,6 +270,7 @@ int acpi_check_mem_region(resource_size_t start, resource_size_t n, #ifdef CONFIG_PM_SLEEP void __init acpi_no_s4_hw_signature(void); void __init acpi_old_suspend_ordering(void); void __init acpi_s4_no_nvs(void); #endif /* CONFIG_PM_SLEEP */ #else /* CONFIG_ACPI */ Loading
