ACK > -----Original Message----- > From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx] > Sent: Tuesday, January 03, 2012 9:13 AM > To: linux-kernel@xxxxxxxxxxxxxxx; rjw@xxxxxxx; x86@xxxxxxxxxx; Brown, Len; Cihula, Joseph; linux- > pm@xxxxxxxxxxxxxxxxxxxxxxxxxx; tboot-devel@xxxxxxxxxxxxxxxxxxxxx; linux-acpi@xxxxxxxxxxxxxxx; > liang.tang@xxxxxxxxxx > Cc: hpa@xxxxxxxxx; Thomas Gleixner; Wang, Shane; xen-devel@xxxxxxxxxxxxxxxxxxx > Subject: Re: [PATCH 1/7] x86, acpi, tboot: Have a ACPI os prepare sleep instead of calling > tboot_sleep. > > On Fri, Dec 16, 2011 at 05:38:13PM -0500, Konrad Rzeszutek Wilk wrote: > > From: Tang Liang <liang.tang@xxxxxxxxxx> > > Hey Joseph, > > I remember you acked the initial rfc patches I had posted. > But I was wondering if these ones are to your liking (I think they are - they aren't that much > different, but I didn't want to blindly sticking 'Acked-by' as they did change a bit). > > Thanks! > > > > 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 > > [v1: Added __attribute__ ((unused))] > > [v2: Introduced a wrapper instead of changing tboot_sleep return > > values] > > [v3: Added return value AE_CTRL_SKIP for acpi_os_sleep_prepare] > > Signed-off-by: Tang Liang <liang.tang@xxxxxxxxxx> > > [v1: Fix compile issues on IA64 and PPC64] > > [v2: Fix where __acpi_os_prepare_sleep==NULL and did not go in sleep > > properly] > > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > > --- > > arch/x86/kernel/tboot.c | 8 ++++++++ > > drivers/acpi/acpica/hwsleep.c | 10 +++++++--- > > drivers/acpi/osl.c | 24 ++++++++++++++++++++++++ > > include/acpi/acexcep.h | 1 + > > include/linux/acpi.h | 10 ++++++++++ > > include/linux/tboot.h | 1 - > > 6 files changed, 50 insertions(+), 4 deletions(-) > > > > diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c index > > e2410e2..1a4ab7d 100644 > > --- a/arch/x86/kernel/tboot.c > > +++ b/arch/x86/kernel/tboot.c > > @@ -297,6 +297,12 @@ void tboot_sleep(u8 sleep_state, u32 > > pm1a_control, u32 pm1b_control) > > > > tboot_shutdown(acpi_shutdown_map[sleep_state]); > > } > > +static int tboot_sleep_wrapper(u8 sleep_state, u32 pm1a_control, > > + u32 pm1b_control) > > +{ > > + tboot_sleep(sleep_state, pm1a_control, pm1b_control); > > + return 0; > > +} > > > > static atomic_t ap_wfs_count; > > > > @@ -345,6 +351,8 @@ static __init int tboot_late_init(void) > > > > atomic_set(&ap_wfs_count, 0); > > register_hotcpu_notifier(&tboot_cpu_notifier); > > + > > + acpi_os_set_prepare_sleep(&tboot_sleep_wrapper); > > return 0; > > } > > > > diff --git a/drivers/acpi/acpica/hwsleep.c > > b/drivers/acpi/acpica/hwsleep.c index d52da30..992359a 100644 > > --- a/drivers/acpi/acpica/hwsleep.c > > +++ b/drivers/acpi/acpica/hwsleep.c > > @@ -43,9 +43,9 @@ > > */ > > > > #include <acpi/acpi.h> > > +#include <linux/acpi.h> > > #include "accommon.h" > > #include "actables.h" > > -#include <linux/tboot.h> > > #include <linux/module.h> > > > > #define _COMPONENT ACPI_HARDWARE > > @@ -344,8 +344,12 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 > > sleep_state) > > > > ACPI_FLUSH_CPU_CACHE(); > > > > - tboot_sleep(sleep_state, pm1a_control, pm1b_control); > > - > > + status = acpi_os_prepare_sleep(sleep_state, pm1a_control, > > + pm1b_control); > > + if (ACPI_SKIP(status)) > > + return_ACPI_STATUS(AE_OK); > > + if (ACPI_FAILURE(status)) > > + return_ACPI_STATUS(status); > > /* Write #2: Write both SLP_TYP + SLP_EN */ > > > > status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); diff > > --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index f31c5c5..f3aae4b > > 100644 > > --- a/drivers/acpi/osl.c > > +++ b/drivers/acpi/osl.c > > @@ -76,6 +76,9 @@ EXPORT_SYMBOL(acpi_in_debugger); extern char > > line_buf[80]; > > #endif /*ENABLE_DEBUGGER */ > > > > +static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, > > + u32 pm1b_ctrl); > > + > > static acpi_osd_handler acpi_irq_handler; static void > > *acpi_irq_context; static struct workqueue_struct *kacpid_wq; @@ > > -1659,3 +1662,24 @@ acpi_status acpi_os_terminate(void) > > > > return AE_OK; > > } > > + > > +acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, > > + u32 pm1b_control) > > +{ > > + int rc = 0; > > + if (__acpi_os_prepare_sleep) > > + rc = __acpi_os_prepare_sleep(sleep_state, > > + pm1a_control, pm1b_control); > > + if (rc < 0) > > + return AE_ERROR; > > + else if (rc > 0) > > + return AE_CTRL_SKIP; > > + > > + return AE_OK; > > +} > > + > > +void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, > > + u32 pm1a_ctrl, u32 pm1b_ctrl)) { > > + __acpi_os_prepare_sleep = func; > > +} > > diff --git a/include/acpi/acexcep.h b/include/acpi/acexcep.h index > > 5b6c391..fa0d22c 100644 > > --- a/include/acpi/acexcep.h > > +++ b/include/acpi/acexcep.h > > @@ -57,6 +57,7 @@ > > #define ACPI_SUCCESS(a) (!(a)) > > #define ACPI_FAILURE(a) (a) > > > > +#define ACPI_SKIP(a) (a == AE_CTRL_SKIP) > > #define AE_OK (acpi_status) 0x0000 > > > > /* > > diff --git a/include/linux/acpi.h b/include/linux/acpi.h index > > 6001b4da..fccd017 100644 > > --- a/include/linux/acpi.h > > +++ b/include/linux/acpi.h > > @@ -359,4 +359,14 @@ static inline int suspend_nvs_register(unsigned > > long a, unsigned long b) } #endif > > > > +#ifdef CONFIG_ACPI > > +void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, > > + u32 pm1a_ctrl, u32 pm1b_ctrl)); > > + > > +acpi_status acpi_os_prepare_sleep(u8 sleep_state, > > + u32 pm1a_control, u32 pm1b_control); #else #define > > +acpi_os_set_prepare_sleep(func, pm1a_ctrl, pm1b_ctrl) do { } while > > +(0) #endif > > + > > #endif /*_LINUX_ACPI_H*/ > > diff --git a/include/linux/tboot.h b/include/linux/tboot.h index > > 1dba6ee..c75128b 100644 > > --- a/include/linux/tboot.h > > +++ b/include/linux/tboot.h > > @@ -143,7 +143,6 @@ 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 struct acpi_table_header *tboot_get_dmar_table( > > struct acpi_table_header *dmar_tbl); extern int > > tboot_force_iommu(void); > > -- > > 1.7.7.4 _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
