diff options
| -rw-r--r-- | arch/x86/include/asm/irq_vectors.h | 4 | ||||
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 54 | ||||
| -rw-r--r-- | arch/x86/kernel/entry_32.S | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 7 | ||||
| -rw-r--r-- | drivers/hv/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/xen/events.c | 7 |
7 files changed, 78 insertions, 9 deletions
diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h index 1508e518c7e3..aac5fa62a86c 100644 --- a/arch/x86/include/asm/irq_vectors.h +++ b/arch/x86/include/asm/irq_vectors.h @@ -109,8 +109,8 @@ #define UV_BAU_MESSAGE 0xf5 -/* Xen vector callback to receive events in a HVM domain */ -#define XEN_HVM_EVTCHN_CALLBACK 0xf3 +/* Vector on which hypervisor callbacks will be delivered */ +#define HYPERVISOR_CALLBACK_VECTOR 0xf3 /* * Local APIC timer IRQ vector is on a different priority level, diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 79ce5685ab64..c2934be2446a 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -11,4 +11,8 @@ struct ms_hyperv_info { extern struct ms_hyperv_info ms_hyperv; +void hyperv_callback_vector(void); +void hyperv_vector_handler(struct pt_regs *regs); +void hv_register_vmbus_handler(int irq, irq_handler_t handler); + #endif diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 0a630dd4b620..a7d26d83fb70 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -14,10 +14,15 @@ #include <linux/time.h> #include <linux/clocksource.h> #include <linux/module.h> +#include <linux/hardirq.h> +#include <linux/interrupt.h> #include <asm/processor.h> #include <asm/hypervisor.h> #include <asm/hyperv.h> #include <asm/mshyperv.h> +#include <asm/desc.h> +#include <asm/idle.h> +#include <asm/irq_regs.h> struct ms_hyperv_info ms_hyperv; EXPORT_SYMBOL_GPL(ms_hyperv); @@ -30,6 +35,13 @@ static bool __init ms_hyperv_platform(void) if (!boot_cpu_has(X86_FEATURE_HYPERVISOR)) return false; + /* + * Xen emulates Hyper-V to support enlightened Windows. + * Check to see first if we are on a Xen Hypervisor. + */ + if (xen_cpuid_base()) + return false; + cpuid(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS, &eax, &hyp_signature[0], &hyp_signature[1], &hyp_signature[2]); @@ -68,7 +80,14 @@ static void __init ms_hyperv_init_platform(void) printk(KERN_INFO "HyperV: features 0x%x, hints 0x%x\n", ms_hyperv.features, ms_hyperv.hints); - clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100); + if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE) + clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100); +#if IS_ENABLED(CONFIG_HYPERV) + /* + * Setup the IDT for hypervisor callback. + */ + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector); +#endif } const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = { @@ -77,3 +96,36 @@ const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = { .init_platform = ms_hyperv_init_platform, }; EXPORT_SYMBOL(x86_hyper_ms_hyperv); + +#if IS_ENABLED(CONFIG_HYPERV) +static int vmbus_irq = -1; +static irq_handler_t vmbus_isr; + +void hv_register_vmbus_handler(int irq, irq_handler_t handler) +{ + vmbus_irq = irq; + vmbus_isr = handler; +} + +void hyperv_vector_handler(struct pt_regs *regs) +{ + struct pt_regs *old_regs = set_irq_regs(regs); + struct irq_desc *desc; + + irq_enter(); + exit_idle(); + + desc = irq_to_desc(vmbus_irq); + + if (desc) + generic_handle_irq_desc(vmbus_irq, desc); + + irq_exit(); + set_irq_regs(old_regs); +} +#else +void hv_register_vmbus_handler(int irq, irq_handler_t handler) +{ +} +#endif +EXPORT_SYMBOL_GPL(hv_register_vmbus_handler); diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 6ed91d9980e2..8831176aa5ef 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -1091,11 +1091,18 @@ ENTRY(xen_failsafe_callback) _ASM_EXTABLE(4b,9b) ENDPROC(xen_failsafe_callback) -BUILD_INTERRUPT3(xen_hvm_callback_vector, XEN_HVM_EVTCHN_CALLBACK, +BUILD_INTERRUPT3(xen_hvm_callback_vector, HYPERVISOR_CALLBACK_VECTOR, xen_evtchn_do_upcall) #endif /* CONFIG_XEN */ +#if IS_ENABLED(CONFIG_HYPERV) + +BUILD_INTERRUPT3(hyperv_callback_vector, HYPERVISOR_CALLBACK_VECTOR, + hyperv_vector_handler) + +#endif /* CONFIG_HYPERV */ + #ifdef CONFIG_FUNCTION_TRACER #ifdef CONFIG_DYNAMIC_FTRACE diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index cb3c591339aa..048f2240f8e6 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1454,11 +1454,16 @@ ENTRY(xen_failsafe_callback) CFI_ENDPROC END(xen_failsafe_callback) -apicinterrupt XEN_HVM_EVTCHN_CALLBACK \ +apicinterrupt HYPERVISOR_CALLBACK_VECTOR \ xen_hvm_callback_vector xen_evtchn_do_upcall #endif /* CONFIG_XEN */ +#if IS_ENABLED(CONFIG_HYPERV) +apicinterrupt HYPERVISOR_CALLBACK_VECTOR \ + hyperv_callback_vector hyperv_vector_handler +#endif /* CONFIG_HYPERV */ + /* * Some functions should be protected against kprobes */ diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig index b38ef6d8d049..64630f15f181 100644 --- a/drivers/hv/Kconfig +++ b/drivers/hv/Kconfig @@ -2,7 +2,7 @@ menu "Microsoft Hyper-V guest support" config HYPERV tristate "Microsoft Hyper-V client drivers" - depends on X86 && ACPI && PCI + depends on X86 && ACPI && PCI && X86_LOCAL_APIC help Select this option to run Linux as a Hyper-V client operating system. diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 74d77dfa5f63..22f77c5f6012 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -1787,7 +1787,7 @@ void xen_callback_vector(void) int rc; uint64_t callback_via; if (xen_have_vector_callback) { - callback_via = HVM_CALLBACK_VECTOR(XEN_HVM_EVTCHN_CALLBACK); + callback_via = HVM_CALLBACK_VECTOR(HYPERVISOR_CALLBACK_VECTOR); rc = xen_set_callback_via(callback_via); if (rc) { printk(KERN_ERR "Request for Xen HVM callback vector" @@ -1798,8 +1798,9 @@ void xen_callback_vector(void) printk(KERN_INFO "Xen HVM callback vector for event delivery is " "enabled\n"); /* in the restore case the vector has already been allocated */ - if (!test_bit(XEN_HVM_EVTCHN_CALLBACK, used_vectors)) - alloc_intr_gate(XEN_HVM_EVTCHN_CALLBACK, xen_hvm_callback_vector); + if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors)) + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, + xen_hvm_callback_vector); } } #else |