X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_time.h;h=0bbb6cccd8b4e283090e095add5b696bf0e4c592;hb=ff3728843f8471d39cf2ea3511267feb83f14678;hp=0377be87acfa39de8dfe926269add0a0d09332c2;hpb=69982930e8a2c0e44aeae5a95497fb896dad3da3;p=palacios.git diff --git a/palacios/include/palacios/vmm_time.h b/palacios/include/palacios/vmm_time.h index 0377be8..0bbb6cc 100644 --- a/palacios/include/palacios/vmm_time.h +++ b/palacios/include/palacios/vmm_time.h @@ -7,11 +7,13 @@ * 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". @@ -29,82 +31,137 @@ struct guest_info; -struct vm_time { - uint32_t cpu_freq; // in kHZ in terms of guest CPU speed - // which ideally can be different lower than - // host CPU speed! - - uint32_t time_mult; // Fields for computing monotonic guest time - uint32_t time_div; // from host (tsc) time - sint64_t time_offset; - - sint64_t tsc_time_offset; // Offset for computing guest TSC value from - // monotonic guest time - +/* Per-VM time information */ +struct v3_time { + uint32_t td_mult; +}; + +/* Per-core time information */ +struct vm_core_time { + uint32_t host_cpu_freq; // in kHZ + uint32_t guest_cpu_freq; // can be lower than host CPU freq! + + 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 + uint64_t last_update; // Last time (in monotonic guest time) the // timers were updated - uint64_t pause_time; // Cache value to help calculate the guest_tsc - + 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 + uint64_t pause_time; // Time at which the VM core was paused struct v3_msr tsc_aux; // Auxilliary MSR for RDTSCP // Installed Timers slaved off of the guest monotonic TSC uint_t num_timers; struct list_head timers; -}; - - + // Installed timeout handlers, and the time (in monotonic guest time) of hte + // next timeout. + uint64_t next_timeout; + struct list_head timeout_hooks; +}; -struct vm_timer_ops { +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 { +struct v3_timer { void * private_data; - struct vm_timer_ops * ops; + struct v3_timer_ops * ops; + + // Need to add accuracy/resolution fields later. struct list_head timer_link; }; +typedef void (*v3_timeout_callback_t)(struct guest_info * info, void * priv_data); +struct v3_timeout_hook { + void * private_data; + v3_timeout_callback_t callback; + + struct list_head hook_link; +}; +// 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); +void v3_deinit_time_core(struct guest_info * core); +void v3_deinit_time_vm(struct v3_vm_info * vm); -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_timers(struct guest_info * info); +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_pause_time(struct guest_info * core); +int v3_resume_time(struct guest_info * core); +int v3_offset_time(struct guest_info * core, sint64_t offset); -void v3_init_time(struct guest_info * info); -int v3_start_time(struct guest_info * info); -int v3_pause_time(struct guest_info * info); -int v3_resume_time(struct guest_info * info); +int v3_adjust_time(struct guest_info * core); + +// Basic functions for attaching timers to the passage of time - these timers +// should eventually specify their accuracy and resolution. +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); -// Returns host time -static inline uint64_t v3_get_host_time(struct vm_time *t) { +// Functions for handling one-shot timeouts in Palacios. Note that only one +// timeout is every currently outstanding (the soonest scheduled one!), and that +// all hooks are called on any timeout. If a hook gets called before the desired +// timeout time, that hook should reschedule its own timeout if desired. +struct v3_timeout_hook * v3_add_timeout_hook(struct guest_info * info, v3_timeout_callback_t callback, void * priv_data); +int v3_remove_timeout_hook(struct guest_info * info, struct v3_timeout_hook * hook); +int v3_schedule_timeout(struct guest_info * info, ullong_t cycles); +int v3_check_timeout(struct guest_info * info); + +// Functions to return the different notions of time in Palacios. +static inline uint64_t v3_get_host_time(struct vm_core_time *t) { uint64_t tmp; rdtscll(tmp); return tmp; } // Returns *monotonic* guest time. -static inline uint64_t v3_get_guest_time(struct vm_time *t) { - if (t->pause_time) return t->pause_time; - else return v3_get_host_time(t) + t->time_offset; +static inline uint64_t v3_compute_guest_time(struct vm_core_time *t, uint64_t ht) { + if (t->pause_time) + return t->pause_time + t->guest_host_offset; + else + return ht + t->guest_host_offset; +} + +static inline uint64_t v3_get_guest_time(struct vm_core_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_get_guest_tsc(struct vm_time *t) { - return v3_get_guest_time(t) + t->tsc_time_offset; +static inline uint64_t v3_compute_guest_tsc(struct vm_core_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_core_time *t) { + return v3_compute_guest_tsc(t, v3_get_host_time(t)); +} + +// Returns offset of guest TSC from host TSC +static inline sint64_t v3_tsc_host_offset(struct vm_core_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); + + + #endif // !__V3VEE__ #endif