X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_time.h;h=9293329f7bae6a93bb6f60d87d7aa27332793e9b;hb=c1810f8134ef829599525d30856970f0155da1f3;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..9293329 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 +31,111 @@ 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 - - uint64_t last_update; // Last time (in monotonic guest time) the + +/* Per-VM time information */ +struct v3_time { + int flags; + uint32_t td_num, td_denom; +}; +#define V3_TIME_SLAVE_HOST (1 << 0) +#define V3_TIME_TSC_PASSTHROUGH (1 << 1) + +/* 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! + + // Multipliers for TSC speed and performance speed + uint32_t clock_ratio_num, clock_ratio_denom; + uint32_t ipc_ratio_num, ipc_ratio_denom; + + uint64_t guest_cycles; + sint64_t tsc_guest_offset; // Offset of guest TSC from guest cycles + + uint64_t last_update; // Last time (in guest cycles) the // timers were updated - uint64_t pause_time; // Cache value to help calculate the guest_tsc - + uint64_t initial_host_time;// Host time when VMM started. struct v3_msr tsc_aux; // Auxilliary MSR for RDTSCP + int flags; + // Installed Timers slaved off of the guest monotonic TSC uint_t num_timers; struct list_head timers; -}; - +}; +#define VM_TIME_SLAVE_HOST (1 << 0) +#define VM_TIME_TSC_PASSTHROUGH (1 << 1) +#define VM_TIME_TRAP_RDTSC (1 << 2) -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; }; +// 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); -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); +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); -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_advance_time(struct guest_info * core, uint64_t * guest_cycles); -// Returns host time -static inline uint64_t v3_get_host_time(struct vm_time *t) { +// 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); + +// 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_get_guest_time(struct vm_core_time *t) { + return t->guest_cycles; } -// 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_get_guest_tsc(struct vm_core_time *t) { + return v3_get_guest_time(t) + t->tsc_guest_offset; } +// Returns offset of guest TSC from host TSC +static inline sint64_t v3_tsc_host_offset(struct vm_core_time *time_state) { + uint64_t host_time = v3_get_host_time(time_state); + return (sint64_t)v3_get_guest_tsc(time_state) - (sint64_t)host_time; +} + +// 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