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Signed-off-by: Matias Ezequiel Vara Larsen --- xen/common/domain.c | 42 +++++++++++++++++++++++++++++++++++++ xen/common/memory.c | 29 +++++++++++++++++++++++++ xen/common/sched/core.c | 5 +++++ xen/include/public/memory.h | 1 + xen/include/xen/sched.h | 5 +++++ 5 files changed, 82 insertions(+) diff --git a/xen/common/domain.c b/xen/common/domain.c index 17cc32fde3..ddd9f88874 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -132,6 +132,42 @@ static void vcpu_info_reset(struct vcpu *v) v->vcpu_info_mfn = INVALID_MFN; } +static void stats_free_buffer(struct vcpu * v) +{ + struct page_info *pg = v->stats.pg; + + if ( !pg ) + return; + + v->stats.va = NULL; + + if ( v->stats.va ) + unmap_domain_page_global(v->stats.va); + + v->stats.va = NULL; + + free_domheap_page(pg); +} + +static int stats_alloc_buffer(struct vcpu *v) +{ + struct domain *d = v->domain; + struct page_info *pg; + + pg = alloc_domheap_page(d, MEMF_no_refcount); + + if ( !pg ) + return -ENOMEM; + + v->stats.va = __map_domain_page_global(pg); + if ( !v->stats.va ) + return -ENOMEM; + + v->stats.pg = pg; + clear_page(v->stats.va); + return 0; +} + static void vmtrace_free_buffer(struct vcpu *v) { const struct domain *d = v->domain; @@ -203,6 +239,9 @@ static int vmtrace_alloc_buffer(struct vcpu *v) */ static int vcpu_teardown(struct vcpu *v) { + + stats_free_buffer(v); + vmtrace_free_buffer(v); return 0; @@ -269,6 +308,9 @@ struct vcpu *vcpu_create(struct domain *d, unsigned int vcpu_id) if ( vmtrace_alloc_buffer(v) != 0 ) goto fail_wq; + if ( stats_alloc_buffer(v) != 0 ) + goto fail_wq; + if ( arch_vcpu_create(v) != 0 ) goto fail_sched; diff --git a/xen/common/memory.c b/xen/common/memory.c index 297b98a562..39de6d9d05 100644 --- a/xen/common/memory.c +++ b/xen/common/memory.c @@ -1099,6 +1099,10 @@ static unsigned int resource_max_frames(const struct domain *d, case XENMEM_resource_vmtrace_buf: return d->vmtrace_size >> PAGE_SHIFT; + // WIP: to figure out the correct size of the resource + case XENMEM_resource_stats_table: + return 1; + default: return -EOPNOTSUPP; } @@ -1162,6 +1166,28 @@ static int acquire_vmtrace_buf( return nr_frames; } +static int acquire_stats_table(struct domain *d, + unsigned int id, + unsigned int frame, + unsigned int nr_frames, + xen_pfn_t mfn_list[]) +{ + const struct vcpu *v = domain_vcpu(d, id); + mfn_t mfn; + + if ( !v ) + return -ENOENT; + + if ( !v->stats.pg ) + return -EINVAL; + + mfn = page_to_mfn(v->stats.pg); + mfn_list[0] = mfn_x(mfn); + + printk("acquire_perf_table: id: %d, nr_frames: %d, %p, domainid: %d\n", id, nr_frames, v->stats.pg, d->domain_id); + return 1; +} + /* * Returns -errno on error, or positive in the range [1, nr_frames] on * success. Returning less than nr_frames contitutes a request for a @@ -1182,6 +1208,9 @@ static int _acquire_resource( case XENMEM_resource_vmtrace_buf: return acquire_vmtrace_buf(d, id, frame, nr_frames, mfn_list); + case XENMEM_resource_stats_table: + return acquire_stats_table(d, id, frame, nr_frames, mfn_list); + default: return -EOPNOTSUPP; } diff --git a/xen/common/sched/core.c b/xen/common/sched/core.c index 8f4b1ca10d..2a8b534977 100644 --- a/xen/common/sched/core.c +++ b/xen/common/sched/core.c @@ -264,6 +264,7 @@ static inline void vcpu_runstate_change( { s_time_t delta; struct sched_unit *unit = v->sched_unit; + uint64_t * runstate; ASSERT(spin_is_locked(get_sched_res(v->processor)->schedule_lock)); if ( v->runstate.state == new_state ) @@ -287,6 +288,10 @@ static inline void vcpu_runstate_change( } v->runstate.state = new_state; + + // WIP: use a different interface + runstate = (uint64_t*)v->stats.va; + memcpy(runstate, &v->runstate.time[0], sizeof(v->runstate.time[0])); } void sched_guest_idle(void (*idle) (void), unsigned int cpu) diff --git a/xen/include/public/memory.h b/xen/include/public/memory.h index 50e73eef98..752fd0be0f 100644 --- a/xen/include/public/memory.h +++ b/xen/include/public/memory.h @@ -626,6 +626,7 @@ struct xen_mem_acquire_resource { #define XENMEM_resource_ioreq_server 0 #define XENMEM_resource_grant_table 1 #define XENMEM_resource_vmtrace_buf 2 +#define XENMEM_resource_stats_table 3 /* * IN - a type-specific resource identifier, which must be zero diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index 5485d08afb..bc99adea7e 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -284,6 +284,11 @@ struct vcpu struct page_info *pg; /* One contiguous allocation of d->vmtrace_size */ } vmtrace; + struct { + struct page_info *pg; + void * va; + } stats; + struct arch_vcpu arch; #ifdef CONFIG_IOREQ_SERVER