> From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx] > Sent: Wednesday, August 31, 2011 11:31 AM > > The ACPI suspend path makes a call to tboot_sleep right before it writes the PM1A, PM1B values. We > replace the direct call to tboot via an registration callback similar to __acpi_register_gsi. > > CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > CC: "H. Peter Anvin" <hpa@xxxxxxxxx> > CC: x86@xxxxxxxxxx > CC: Len Brown <len.brown@xxxxxxxxx> > CC: Joseph Cihula <joseph.cihula@xxxxxxxxx> > CC: Shane Wang <shane.wang@xxxxxxxxx> > CC: xen-devel@xxxxxxxxxxxxxxxxxxx > CC: linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx > CC: tboot-devel@xxxxxxxxxxxxxxxxxxxxx > CC: linux-acpi@xxxxxxxxxxxxxxx > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > --- > arch/x86/include/asm/acpi.h | 3 +++ > arch/x86/kernel/acpi/boot.c | 3 +++ > arch/x86/kernel/tboot.c | 13 +++++++++---- > drivers/acpi/acpica/hwsleep.c | 12 ++++++++++-- > include/linux/tboot.h | 3 ++- > 5 files changed, 27 insertions(+), 7 deletions(-) > > diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index 610001d..49864a1 > 100644 > --- a/arch/x86/include/asm/acpi.h > +++ b/arch/x86/include/asm/acpi.h > @@ -98,6 +98,9 @@ void acpi_pic_sci_set_trigger(unsigned int, u16); extern int > (*__acpi_register_gsi)(struct device *dev, u32 gsi, > int trigger, int polarity); > > +extern int (*__acpi_override_sleep)(u8 sleep_state, u32 pm1a_ctrl, > + u32 pm1b_ctrl, bool *skip_rest); > + > static inline void disable_acpi(void) > { > acpi_disabled = 1; > diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 4558f0d..d191b4c > 100644 > --- a/arch/x86/kernel/acpi/boot.c > +++ b/arch/x86/kernel/acpi/boot.c > @@ -552,6 +552,9 @@ 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_override_sleep)(u8 sleep_state, u32 pm1a_ctrl, > + u32 pm1b_ctrl, bool *skip_rest) = NULL; > + > /* > * success: return IRQ number (>=0) > * failure: return < 0 > diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c index 30ac65d..a18070c 100644 > --- a/arch/x86/kernel/tboot.c > +++ b/arch/x86/kernel/tboot.c > @@ -41,7 +41,7 @@ > #include <asm/setup.h> > #include <asm/e820.h> > #include <asm/io.h> > - > +#include <linux/acpi.h> > #include "acpi/realmode/wakeup.h" > > /* Global pointer to shared data; NULL means no measured launch. */ @@ -270,7 +270,8 @@ static > void tboot_copy_fadt(const struct acpi_table_fadt *fadt) > offsetof(struct acpi_table_facs, firmware_waking_vector); } > > -void tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control) > +int tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control, > + bool *skip_rest) Don't you need to use the 'unused' attrib on skip_rest in order to prevent compiler warnings? > { > static u32 acpi_shutdown_map[ACPI_S_STATE_COUNT] = { > /* S0,1,2: */ -1, -1, -1, > @@ -279,7 +280,7 @@ void tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control) > /* S5: */ TB_SHUTDOWN_S5 }; > > if (!tboot_enabled()) > - return; > + return AE_OK; > > tboot_copy_fadt(&acpi_gbl_FADT); > tboot->acpi_sinfo.pm1a_cnt_val = pm1a_control; @@ -290,10 +291,12 @@ void tboot_sleep(u8 > sleep_state, u32 pm1a_control, u32 pm1b_control) > if (sleep_state >= ACPI_S_STATE_COUNT || > acpi_shutdown_map[sleep_state] == -1) { > pr_warning("unsupported sleep state 0x%x\n", sleep_state); > - return; > + return AE_ERROR; > } > > tboot_shutdown(acpi_shutdown_map[sleep_state]); > + > + return AE_OK; > } > > static atomic_t ap_wfs_count; > @@ -343,6 +346,8 @@ static __init int tboot_late_init(void) > > atomic_set(&ap_wfs_count, 0); > register_hotcpu_notifier(&tboot_cpu_notifier); > + > + __acpi_override_sleep = tboot_sleep; > return 0; > } > > diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c index 2ac28bb..31d1198 > 100644 > --- a/drivers/acpi/acpica/hwsleep.c > +++ b/drivers/acpi/acpica/hwsleep.c > @@ -45,7 +45,6 @@ > #include <acpi/acpi.h> > #include "accommon.h" > #include "actables.h" > -#include <linux/tboot.h> > > #define _COMPONENT ACPI_HARDWARE > ACPI_MODULE_NAME("hwsleep") > @@ -343,8 +342,17 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) > > ACPI_FLUSH_CPU_CACHE(); > > - tboot_sleep(sleep_state, pm1a_control, pm1b_control); > + if (__acpi_override_sleep) { > + bool skip_rest = false; > > + status = __acpi_override_sleep(sleep_state, pm1a_control, > + pm1b_control, &skip_rest); > + > + if (ACPI_FAILURE(status)) > + return_ACPI_STATUS(status); > + if (skip_rest) > + return_ACPI_STATUS(AE_OK); > + } > /* Write #2: Write both SLP_TYP + SLP_EN */ > > status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); diff --git > a/include/linux/tboot.h b/include/linux/tboot.h index 1dba6ee..19badbd 100644 > --- a/include/linux/tboot.h > +++ b/include/linux/tboot.h > @@ -143,7 +143,8 @@ static inline int tboot_enabled(void) > > extern void tboot_probe(void); > extern void tboot_shutdown(u32 shutdown_type); -extern void tboot_sleep(u8 sleep_state, u32 > pm1a_control, u32 pm1b_control); > +extern int tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control, > + bool *skip); > extern struct acpi_table_header *tboot_get_dmar_table( > struct acpi_table_header *dmar_tbl); extern int > tboot_force_iommu(void); > -- > 1.7.4.1 _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
