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 @@ +#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 @@ +#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
