| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Vitaly Kuznetsov | 443 | 38.83% | 14 | 29.17% |
| K. Y. Srinivasan | 242 | 21.21% | 10 | 20.83% |
| Michael Kelley | 160 | 14.02% | 5 | 10.42% |
| Thomas Gleixner | 96 | 8.41% | 4 | 8.33% |
| H. Peter Anvin | 81 | 7.10% | 3 | 6.25% |
| Yi Sun | 52 | 4.56% | 1 | 2.08% |
| Jason (Hui) Wang | 22 | 1.93% | 2 | 4.17% |
| Lan Tianyu | 15 | 1.31% | 1 | 2.08% |
| Denis V. Lunev | 9 | 0.79% | 1 | 2.08% |
| Juergen Gross | 8 | 0.70% | 2 | 4.17% |
| Paul Gortmaker | 4 | 0.35% | 1 | 2.08% |
| David Rientjes | 3 | 0.26% | 1 | 2.08% |
| Daniel Drake | 2 | 0.18% | 1 | 2.08% |
| Olaf Hering | 2 | 0.18% | 1 | 2.08% |
| Chen Yucong | 2 | 0.18% | 1 | 2.08% |
| Total | 1141 | 48 |
// SPDX-License-Identifier: GPL-2.0-only /* * HyperV Detection code. * * Copyright (C) 2010, Novell, Inc. * Author : K. Y. Srinivasan <ksrinivasan@novell.com> */ #include <linux/types.h> #include <linux/time.h> #include <linux/clocksource.h> #include <linux/init.h> #include <linux/export.h> #include <linux/hardirq.h> #include <linux/efi.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/kexec.h> #include <linux/i8253.h> #include <linux/random.h> #include <asm/processor.h> #include <asm/hypervisor.h> #include <asm/hyperv-tlfs.h> #include <asm/mshyperv.h> #include <asm/desc.h> #include <asm/irq_regs.h> #include <asm/i8259.h> #include <asm/apic.h> #include <asm/timer.h> #include <asm/reboot.h> #include <asm/nmi.h> struct ms_hyperv_info ms_hyperv; EXPORT_SYMBOL_GPL(ms_hyperv); #if IS_ENABLED(CONFIG_HYPERV) static void (*vmbus_handler)(void); static void (*hv_stimer0_handler)(void); static void (*hv_kexec_handler)(void); static void (*hv_crash_handler)(struct pt_regs *regs); __visible void __irq_entry hyperv_vector_handler(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); entering_irq(); inc_irq_stat(irq_hv_callback_count); if (vmbus_handler) vmbus_handler(); if (ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED) ack_APIC_irq(); exiting_irq(); set_irq_regs(old_regs); } void hv_setup_vmbus_irq(void (*handler)(void)) { vmbus_handler = handler; } void hv_remove_vmbus_irq(void) { /* We have no way to deallocate the interrupt gate */ vmbus_handler = NULL; } EXPORT_SYMBOL_GPL(hv_setup_vmbus_irq); EXPORT_SYMBOL_GPL(hv_remove_vmbus_irq); /* * Routines to do per-architecture handling of stimer0 * interrupts when in Direct Mode */ __visible void __irq_entry hv_stimer0_vector_handler(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); entering_irq(); inc_irq_stat(hyperv_stimer0_count); if (hv_stimer0_handler) hv_stimer0_handler(); add_interrupt_randomness(HYPERV_STIMER0_VECTOR, 0); ack_APIC_irq(); exiting_irq(); set_irq_regs(old_regs); } int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void)) { *vector = HYPERV_STIMER0_VECTOR; *irq = -1; /* Unused on x86/x64 */ hv_stimer0_handler = handler; return 0; } EXPORT_SYMBOL_GPL(hv_setup_stimer0_irq); void hv_remove_stimer0_irq(int irq) { /* We have no way to deallocate the interrupt gate */ hv_stimer0_handler = NULL; } EXPORT_SYMBOL_GPL(hv_remove_stimer0_irq); void hv_setup_kexec_handler(void (*handler)(void)) { hv_kexec_handler = handler; } EXPORT_SYMBOL_GPL(hv_setup_kexec_handler); void hv_remove_kexec_handler(void) { hv_kexec_handler = NULL; } EXPORT_SYMBOL_GPL(hv_remove_kexec_handler); void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs)) { hv_crash_handler = handler; } EXPORT_SYMBOL_GPL(hv_setup_crash_handler); void hv_remove_crash_handler(void) { hv_crash_handler = NULL; } EXPORT_SYMBOL_GPL(hv_remove_crash_handler); #ifdef CONFIG_KEXEC_CORE static void hv_machine_shutdown(void) { if (kexec_in_progress && hv_kexec_handler) hv_kexec_handler(); native_machine_shutdown(); } static void hv_machine_crash_shutdown(struct pt_regs *regs) { if (hv_crash_handler) hv_crash_handler(regs); native_machine_crash_shutdown(regs); } #endif /* CONFIG_KEXEC_CORE */ #endif /* CONFIG_HYPERV */ static uint32_t __init ms_hyperv_platform(void) { u32 eax; u32 hyp_signature[3]; if (!boot_cpu_has(X86_FEATURE_HYPERVISOR)) return 0; cpuid(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS, &eax, &hyp_signature[0], &hyp_signature[1], &hyp_signature[2]); if (eax >= HYPERV_CPUID_MIN && eax <= HYPERV_CPUID_MAX && !memcmp("Microsoft Hv", hyp_signature, 12)) return HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS; return 0; } static unsigned char hv_get_nmi_reason(void) { return 0; } #ifdef CONFIG_X86_LOCAL_APIC /* * Prior to WS2016 Debug-VM sends NMIs to all CPUs which makes * it dificult to process CHANNELMSG_UNLOAD in case of crash. Handle * unknown NMI on the first CPU which gets it. */ static int hv_nmi_unknown(unsigned int val, struct pt_regs *regs) { static atomic_t nmi_cpu = ATOMIC_INIT(-1); if (!unknown_nmi_panic) return NMI_DONE; if (atomic_cmpxchg(&nmi_cpu, -1, raw_smp_processor_id()) != -1) return NMI_HANDLED; return NMI_DONE; } #endif static unsigned long hv_get_tsc_khz(void) { unsigned long freq; rdmsrl(HV_X64_MSR_TSC_FREQUENCY, freq); return freq / 1000; } #if defined(CONFIG_SMP) && IS_ENABLED(CONFIG_HYPERV) static void __init hv_smp_prepare_boot_cpu(void) { native_smp_prepare_boot_cpu(); #if defined(CONFIG_X86_64) && defined(CONFIG_PARAVIRT_SPINLOCKS) hv_init_spinlocks(); #endif } #endif static void __init ms_hyperv_init_platform(void) { int hv_host_info_eax; int hv_host_info_ebx; int hv_host_info_ecx; int hv_host_info_edx; /* * Extract the features and hints */ ms_hyperv.features = cpuid_eax(HYPERV_CPUID_FEATURES); ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES); ms_hyperv.hints = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO); pr_info("Hyper-V: features 0x%x, hints 0x%x\n", ms_hyperv.features, ms_hyperv.hints); ms_hyperv.max_vp_index = cpuid_eax(HYPERV_CPUID_IMPLEMENT_LIMITS); ms_hyperv.max_lp_index = cpuid_ebx(HYPERV_CPUID_IMPLEMENT_LIMITS); pr_debug("Hyper-V: max %u virtual processors, %u logical processors\n", ms_hyperv.max_vp_index, ms_hyperv.max_lp_index); /* * Extract host information. */ if (cpuid_eax(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS) >= HYPERV_CPUID_VERSION) { hv_host_info_eax = cpuid_eax(HYPERV_CPUID_VERSION); hv_host_info_ebx = cpuid_ebx(HYPERV_CPUID_VERSION); hv_host_info_ecx = cpuid_ecx(HYPERV_CPUID_VERSION); hv_host_info_edx = cpuid_edx(HYPERV_CPUID_VERSION); pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d\n", hv_host_info_eax, hv_host_info_ebx >> 16, hv_host_info_ebx & 0xFFFF, hv_host_info_ecx, hv_host_info_edx >> 24, hv_host_info_edx & 0xFFFFFF); } if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS && ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) { x86_platform.calibrate_tsc = hv_get_tsc_khz; x86_platform.calibrate_cpu = hv_get_tsc_khz; } if (ms_hyperv.hints & HV_X64_ENLIGHTENED_VMCS_RECOMMENDED) { ms_hyperv.nested_features = cpuid_eax(HYPERV_CPUID_NESTED_FEATURES); } #ifdef CONFIG_X86_LOCAL_APIC if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS && ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) { /* * Get the APIC frequency. */ u64 hv_lapic_frequency; rdmsrl(HV_X64_MSR_APIC_FREQUENCY, hv_lapic_frequency); hv_lapic_frequency = div_u64(hv_lapic_frequency, HZ); lapic_timer_period = hv_lapic_frequency; pr_info("Hyper-V: LAPIC Timer Frequency: %#x\n", lapic_timer_period); } register_nmi_handler(NMI_UNKNOWN, hv_nmi_unknown, NMI_FLAG_FIRST, "hv_nmi_unknown"); #endif #ifdef CONFIG_X86_IO_APIC no_timer_check = 1; #endif #if IS_ENABLED(CONFIG_HYPERV) && defined(CONFIG_KEXEC_CORE) machine_ops.shutdown = hv_machine_shutdown; machine_ops.crash_shutdown = hv_machine_crash_shutdown; #endif mark_tsc_unstable("running on Hyper-V"); /* * Generation 2 instances don't support reading the NMI status from * 0x61 port. */ if (efi_enabled(EFI_BOOT)) x86_platform.get_nmi_reason = hv_get_nmi_reason; /* * Hyper-V VMs have a PIT emulation quirk such that zeroing the * counter register during PIT shutdown restarts the PIT. So it * continues to interrupt @18.2 HZ. Setting i8253_clear_counter * to false tells pit_shutdown() not to zero the counter so that * the PIT really is shutdown. Generation 2 VMs don't have a PIT, * and setting this value has no effect. */ i8253_clear_counter_on_shutdown = false; #if IS_ENABLED(CONFIG_HYPERV) /* * Setup the hook to get control post apic initialization. */ x86_platform.apic_post_init = hyperv_init; hyperv_setup_mmu_ops(); /* Setup the IDT for hypervisor callback */ alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector); /* Setup the IDT for reenlightenment notifications */ if (ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT) alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR, hyperv_reenlightenment_vector); /* Setup the IDT for stimer0 */ if (ms_hyperv.misc_features & HV_STIMER_DIRECT_MODE_AVAILABLE) alloc_intr_gate(HYPERV_STIMER0_VECTOR, hv_stimer0_callback_vector); # ifdef CONFIG_SMP smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu; # endif /* * Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic, * set x2apic destination mode to physcial mode when x2apic is available * and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs * have 8-bit APIC id. */ # ifdef CONFIG_X86_X2APIC if (x2apic_supported()) x2apic_phys = 1; # endif #endif } const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv = { .name = "Microsoft Hyper-V", .detect = ms_hyperv_platform, .type = X86_HYPER_MS_HYPERV, .init.init_platform = ms_hyperv_init_platform, };