> From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx] > Sent: Wednesday, August 31, 2011 11:31 AM > > Provide the registration callback to call in the Xen's ACPI sleep functionality. This means that > during S3/S5 we make a hypercall XENPF_enter_acpi_sleep with the proper PM1A/PM1B registers. > > Based of Ke Yu's <ke.yu@xxxxxxxxx> initial idea. > [ From http://xenbits.xensource.com/linux-2.6.18-xen.hg > change c68699484a65 ] > > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > --- > arch/x86/include/asm/xen/hypercall.h | 8 ++++++++ > arch/x86/xen/enlighten.c | 3 +++ > drivers/xen/Makefile | 2 +- > drivers/xen/acpi.c | 25 +++++++++++++++++++++++++ > include/xen/acpi.h | 26 ++++++++++++++++++++++++++ > 5 files changed, 63 insertions(+), 1 deletions(-) create mode 100644 drivers/xen/acpi.c create > mode 100644 include/xen/acpi.h > > diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h > index d240ea9..0c9894e 100644 > --- a/arch/x86/include/asm/xen/hypercall.h > +++ b/arch/x86/include/asm/xen/hypercall.h > @@ -45,6 +45,7 @@ > #include <xen/interface/xen.h> > #include <xen/interface/sched.h> > #include <xen/interface/physdev.h> > +#include <xen/interface/platform.h> > > /* > * The hypercall asms have to meet several constraints: > @@ -299,6 +300,13 @@ HYPERVISOR_set_timer_op(u64 timeout) } > > static inline int > +HYPERVISOR_dom0_op(struct xen_platform_op *platform_op) { > + platform_op->interface_version = XENPF_INTERFACE_VERSION; > + return _hypercall1(int, dom0_op, platform_op); } > + > +static inline int > HYPERVISOR_set_debugreg(int reg, unsigned long value) { > return _hypercall2(int, set_debugreg, reg, value); diff --git a/arch/x86/xen/enlighten.c > b/arch/x86/xen/enlighten.c index 5525163..6962653 100644 > --- a/arch/x86/xen/enlighten.c > +++ b/arch/x86/xen/enlighten.c > @@ -42,6 +42,7 @@ > #include <xen/page.h> > #include <xen/hvm.h> > #include <xen/hvc-console.h> > +#include <xen/acpi.h> > > #include <asm/paravirt.h> > #include <asm/apic.h> > @@ -1250,6 +1251,8 @@ asmlinkage void __init xen_start_kernel(void) > } else { > /* Make sure ACS will be enabled */ > pci_request_acs(); > + > + xen_acpi_sleep_register(); > } > > > diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile index bbc1825..370552d 100644 > --- a/drivers/xen/Makefile > +++ b/drivers/xen/Makefile > @@ -16,7 +16,7 @@ obj-$(CONFIG_XENFS) += xenfs/ > obj-$(CONFIG_XEN_SYS_HYPERVISOR) += sys-hypervisor.o > obj-$(CONFIG_XEN_PLATFORM_PCI) += xen-platform-pci.o > obj-$(CONFIG_SWIOTLB_XEN) += swiotlb-xen.o > -obj-$(CONFIG_XEN_DOM0) += pci.o > +obj-$(CONFIG_XEN_DOM0) += pci.o acpi.o > > xen-evtchn-y := evtchn.o > xen-gntdev-y := gntdev.o > diff --git a/drivers/xen/acpi.c b/drivers/xen/acpi.c new file mode 100644 index 0000000..c0f829f > --- /dev/null > +++ b/drivers/xen/acpi.c > @@ -0,0 +1,25 @@ Copyright and license? > +#include <xen/acpi.h> > +#include <xen/interface/platform.h> > +#include <asm/xen/hypercall.h> > +#include <asm/xen/hypervisor.h> > + > +int xen_acpi_notify_hypervisor_state(u8 sleep_state, > + u32 pm1a_cnt, u32 pm1b_cnt, > + bool *skip_rest) > +{ > + struct xen_platform_op op = { > + .cmd = XENPF_enter_acpi_sleep, > + .interface_version = XENPF_INTERFACE_VERSION, > + .u = { > + .enter_acpi_sleep = { > + .pm1a_cnt_val = (u16)pm1a_cnt, > + .pm1b_cnt_val = (u16)pm1b_cnt, > + .sleep_state = sleep_state, > + }, > + }, > + }; > + if (skip_rest) > + *skip_rest = true; > + > + return HYPERVISOR_dom0_op(&op); > +} > diff --git a/include/xen/acpi.h b/include/xen/acpi.h new file mode 100644 index 0000000..e414f14 > --- /dev/null > +++ b/include/xen/acpi.h > @@ -0,0 +1,26 @@ Copyright and license? > +#ifndef _XEN_ACPI_H > +#define _XEN_ACPI_H > + > +#include <linux/types.h> > + > +#ifdef CONFIG_XEN_DOM0 > +#include <asm/xen/hypervisor.h> > +#include <xen/xen.h> > +#include <linux/acpi.h> > + > +int xen_acpi_notify_hypervisor_state(u8 sleep_state, > + u32 pm1a_cnt, u32 pm1b_cnd, > + bool *skip_rest); > + > +static inline void xen_acpi_sleep_register(void) { > + if (xen_initial_domain()) > + __acpi_override_sleep = xen_acpi_notify_hypervisor_state; } #else > +static inline void xen_acpi_sleep_register(void) { } #endif > + > +#endif /* _XEN_ACPI_H */ > -- > 1.7.4.1 _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
