convert from svn repository: remove tags directory

[lttv.git] / tags / lttv-0.10.0-pre15-12082008 / doc / developer / xen-port.txt

diff --git a/tags/lttv-0.10.0-pre15-12082008/doc/developer/xen-port.txt b/tags/lttv-0.10.0-pre15-12082008/doc/developer/xen-port.txt
deleted file mode 100644 (file)
index a7218e3..0000000
--- a/tags/lttv-0.10.0-pre15-12082008/doc/developer/xen-port.txt
+++ /dev/null
@@ -1,146 +0,0 @@
-
-
-Xen port notes
-
-Mathieu Desnoyers, April 2006
-
-Useful files :
-
-common/trace.c
-include/xen/trace.h and the dom0 op in include/public/dom0_ops.h
-
-alloc buffer (alloc_trace_bufs) :
-alloc_xenheap_pages
-
-Shared buffer between dom0 and hypervisor :
-share_xen_page_with_privileged_guests
-
-
-
-trace_create / trace_destroy :
-
-call xen hooks from dom0 to allocate a new buffer, get the newly allocated 
-struct trace pointer.
-Share struct traces with dom0 to have offset and consumed counts.
-Share the buffers with dom0 too.
-
-Create a new "xen" channel.
-
-
-Create 4 new xen facilities (see include/public/trace.h) :
-xen_sched  (grep TRC_SCHED)
-  sched_dom_add
-       sched_dom_rem
-       sched_sleep
-       sched_wake
-       sched_yield
-       sched_block
-       sched_shutdown
-       sched_ctl
-       sched_switch
-       sched_s_timer_fn
-       sched_t_timer_fn
-       sched_dom_timer_fn
-       sched_dom_timer_fn
-       sched_switch_infprev
-       sched_switch_infnext
-xen_dom0op (grep TRC_DOM0OP)
-  dom0op_enter_base
-  dom0op_leave_base
-xen_vmx (grep TRC_VMX)
-  vmx_vmexit
-  vmx_vmentry
-       vmx_timer_intr
-       vmx_int
-       vmx_io
-xen_mem (grep TRC_MEM)
-  mem_page_grant_map
-       mem_page_grant_unmap
-       mem_page_grant_transfer
-
-
-How to share xen pages efficiently ?
-Pages allocated in xen heap, the shared with dom0.
-
-How buffers are accessed in dom0 ?
-directly from pointers to buffers contained in get_info control information.
-
-do_dom0_op
-
-tbufcontrol -> control info
-  int tb_control(dom0_tbufcontrol_t *tbc)
-
-DOM0_TBUF_GET_INFO  buffer_mfn   __pa(t_bufs[0]) >> PAGE_SHIFT;
-
-
-create trace :
-
-in : 
-trace name
-buffer size
-return : 0 success, 1 failure
-do :
-alloc buffer xen
-share with dom0
-
-destroy trace :
-in :
-trace name
-do : unshare buffer / free.
-
-
-start/stop : 
-tb_control that will update the control structure.
-in : trace name
-start : put active to 1 + inc. nb_active traces
-stop : put active to 0 + dec nb_active traces.
-return : 0 success, 1 failure.
-
-consume :
-in : trace name
-tb_control that will update the consumed count.
-in : old count.
-return : 0 success, 1 failure (pushed).
-
-get_info :
-tb_control that returns a fresh copy of trace control info.
-
-
-
-NOTE 8-11-2006
-
-Xen 3.0.3
-Only one init of buffers (cannot change buffer size)
-tbc->buffer_mfn = opt_tbuf_size ? virt_to_mfn(per_cpu(t_bufs, 0)) : 0;
-/* Convert between Xen-heap virtual addresses and machine frame numbers. */
-#define virt_to_mfn(va)     (virt_to_maddr(va) >> PAGE_SHIFT)
-
-struct t_buf *tbufs_mapped;
-
-    tbufs_mapped = xc_map_foreign_range(xc_handle, DOMID_XEN,
-                                        size * num, PROT_READ | PROT_WRITE,
-                                        tbufs_mfn);
-
-int fd = open("/proc/xen/privcmd", O_RDWR);
-
-/* sleep for this long (milliseconds) between checking the trace buffers */
-#define POLL_SLEEP_MILLIS 100
-
-
-netfront.c
-xenbus_alloc_evtchn
-bind_evtchn_to_irqhandler
-
-
-virq :
-
-include/public/xen.h VIRQ_TBUF
-                       /* G. (DOM0) Trace buffer has records available. */
-
-trace_notify_guest : send_guest_global_virq(dom0, VIRQ_TBUF);
-
-see arch/i386/oprofile/xenoprof.c
-bind_virq
-
-
-