X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_time.h;h=33ffa2c0fc06996505798a20324c0b4285fe5feb;hb=0e26b3738daf436ba2d9a088ba620a3583d40de3;hp=9af1840cd07f0d46a4caaf5248ca2e1577a1d7c5;hpb=90b8236597004a37a9d5acb33a1b1f987fe9070c;p=palacios.git diff --git a/palacios/include/palacios/vmm_time.h b/palacios/include/palacios/vmm_time.h index 9af1840..33ffa2c 100644 --- a/palacios/include/palacios/vmm_time.h +++ b/palacios/include/palacios/vmm_time.h @@ -1,52 +1,134 @@ +/* + * This file is part of the Palacios Virtual Machine Monitor developed + * by the V3VEE Project with funding from the United States National + * Science Foundation and the Department of Energy. + * + * The V3VEE Project is a joint project between Northwestern University + * and the University of New Mexico. You can find out more at + * http://www.v3vee.org + * + * Copyright (c) 2010, Patrick Bridges + * Copyright (c) 2008, Jack Lange + * Copyright (c) 2008, The V3VEE Project + * All rights reserved. + * + * Author: Jack Lange + * Patrick Bridges + * + * This is free software. You are permitted to use, + * redistribute, and modify it as specified in the file "V3VEE_LICENSE". + */ + #ifndef __VMM_TIME_H #define __VMM_TIME_H +#ifdef __V3VEE__ #include #include +#include +#include struct guest_info; struct vm_time { - uint32_t cpu_freq; // in kHZ + uint32_t host_cpu_freq; // in kHZ + uint32_t guest_cpu_freq; // can be lower than host CPU freq! - // Total number of guest run time cycles - ullong_t guest_tsc; + sint64_t guest_host_offset;// Offset of monotonic guest time from host time + sint64_t tsc_guest_offset; // Offset of guest TSC from monotonic guest time - // Cache value to help calculate the guest_tsc - ullong_t cached_host_tsc; + uint64_t last_update; // Last time (in monotonic guest time) the + // timers were updated - // The number of cycles pending for notification to the timers - //ullong_t pending_cycles; + uint64_t initial_time; // Time when VMM started. + uint64_t enter_time; // Host time the guest was last entered + uint64_t exit_time; // Host time the the VM was exited to + struct v3_msr tsc_aux; // Auxilliary MSR for RDTSCP - // Installed Timers - uint_t num_timers; - struct list_head timers; + // Installed Timers slaved off of the guest monotonic TSC + uint_t num_timers; + struct list_head timers; }; +struct v3_timer_ops { + void (*update_timer)(struct guest_info * info, ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data); + void (*advance_timer)(struct guest_info * info, void * private_data); +}; -struct vm_timer_ops { - void (*update_time)(ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data); +struct v3_timer { + void * private_data; + struct v3_timer_ops * ops; + struct list_head timer_link; }; -struct vm_timer { - void * private_data; - struct vm_timer_ops * ops; +// Basic functions for handling passage of time in palacios +void v3_init_time_core(struct guest_info * core); +int v3_init_time_vm(struct v3_vm_info * vm); - struct list_head timer_link; -}; +void v3_deinit_time_core(struct guest_info * core); +void v3_deinit_time_vm(struct v3_vm_info * vm); + +int v3_start_time(struct guest_info * core); + +int v3_time_enter_vm(struct guest_info * core); +int v3_time_exit_vm(struct guest_info * core); + +int v3_adjust_time(struct guest_info * core); +int v3_offset_time(struct guest_info * core, sint64_t offset); + +// Basic functions for attaching timers to the passage of time +struct v3_timer * v3_add_timer(struct guest_info * info, struct v3_timer_ops * ops, void * private_data); +int v3_remove_timer(struct guest_info * info, struct v3_timer * timer); +void v3_update_timers(struct guest_info * info); + +// Functions to return the different notions of time in Palacios. +static inline uint64_t v3_get_host_time(struct vm_time *t) { + uint64_t tmp; + rdtscll(tmp); + return tmp; +} + +// Returns *monotonic* guest time. +static inline uint64_t v3_compute_guest_time(struct vm_time *t, uint64_t ht) { +#ifdef V3_CONFIG_TIME_HIDE_VM_COST + V3_ASSERT(t->exit_time); + return t->exit_time + t->guest_host_offset; +#else + return v3_get_host_time(t) + t->guest_host_offset; +#endif +} + +static inline uint64_t v3_get_guest_time(struct vm_time *t) { + return v3_compute_guest_time(t, v3_get_host_time(t)); +} + +// Returns the TSC value seen by the guest +static inline uint64_t v3_compute_guest_tsc(struct vm_time *t, uint64_t ht) { + return v3_compute_guest_time(t, ht) + t->tsc_guest_offset; +} +static inline uint64_t v3_get_guest_tsc(struct vm_time *t) { + return v3_compute_guest_tsc(t, v3_get_host_time(t)); +} -void v3_init_time(struct vm_time * time_state); +// Returns offset of guest TSC from host TSC +static inline sint64_t v3_tsc_host_offset(struct vm_time *time_state) { + return time_state->guest_host_offset + time_state->tsc_guest_offset; +} +// Functions for handling exits on the TSC when fully virtualizing +// the timestamp counter. +#define TSC_MSR 0x10 +#define TSC_AUX_MSR 0xC0000103 +int v3_handle_rdtscp(struct guest_info *info); +int v3_handle_rdtsc(struct guest_info *info); -int v3_add_timer(struct guest_info * info, struct vm_timer_ops * ops, void * private_data); -int v3_remove_timer(struct guest_info * info, struct vm_timer * timer); -void v3_update_time(struct guest_info * info, ullong_t cycles); +#endif // !__V3VEE__ #endif