[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 6/7] x86/acpi/sleep: Provide registration for acpi_suspend_lowlevel
Which by default will be x86_acpi_suspend_lowlevel. This registration allows us to register another callback if there is a need to use another platform specific callback. Signed-off-by: Liang Tang <liang.tang@xxxxxxxxxx> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> --- arch/x86/include/asm/acpi.h | 2 +- arch/x86/kernel/acpi/boot.c | 2 ++ arch/x86/kernel/acpi/sleep.c | 4 ++-- arch/x86/kernel/acpi/sleep.h | 2 ++ drivers/acpi/sleep.c | 2 ++ 5 files changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index 610001d..68cf060 100644 --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -115,7 +115,7 @@ static inline void acpi_disable_pci(void) } /* Low-level suspend routine. */ -extern int acpi_suspend_lowlevel(void); +extern int (*acpi_suspend_lowlevel)(void); extern const unsigned char acpi_wakeup_code[]; #define acpi_wakeup_address (__pa(TRAMPOLINE_SYM(acpi_wakeup_code))) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 4558f0d..eb85e88 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -44,6 +44,7 @@ #include <asm/mpspec.h> #include <asm/smp.h> +#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ static int __initdata acpi_force = 0; u32 acpi_rsdt_forced; int acpi_disabled; @@ -552,6 +553,7 @@ static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, int (*__acpi_register_gsi)(struct device *dev, u32 gsi, int trigger, int polarity) = acpi_register_gsi_pic; +int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; /* * success: return IRQ number (>=0) * failure: return < 0 diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index 103b6ab..4d2d0b1 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -25,12 +25,12 @@ static char temp_stack[4096]; #endif /** - * acpi_suspend_lowlevel - save kernel state + * x86_acpi_suspend_lowlevel - save kernel state * * Create an identity mapped page table and copy the wakeup routine to * low memory. */ -int acpi_suspend_lowlevel(void) +int x86_acpi_suspend_lowlevel(void) { struct wakeup_header *header; /* address in low memory of the wakeup routine. */ diff --git a/arch/x86/kernel/acpi/sleep.h b/arch/x86/kernel/acpi/sleep.h index 416d4be..4d3feb5 100644 --- a/arch/x86/kernel/acpi/sleep.h +++ b/arch/x86/kernel/acpi/sleep.h @@ -13,3 +13,5 @@ extern unsigned long acpi_copy_wakeup_routine(unsigned long); extern void wakeup_long64(void); extern void do_suspend_lowlevel(void); + +extern int x86_acpi_suspend_lowlevel(void); diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 6d9a3ab..b8b26e8 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -254,6 +254,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state) break; case ACPI_STATE_S3: + if (!acpi_suspend_lowlevel) + return -ENODEV; error = acpi_suspend_lowlevel(); if (error) return error; -- 1.7.7.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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