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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2009-12-16 01:11:51 +0100
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2009-12-16 01:11:51 +0100
commit55dbc2b5d857d35262ad3116803dfb31b733d031 (patch)
tree9b9a7d7952ff74855de2a6c348e9c856a531158d /xen/public/trace.h
parent870925205c78415dc4c594bfae9de8eb31745b81 (diff)
Add Xen support
2009-03-11 Samuel Thibault <samuel.thibault@ens-lyon.org> * i386/i386/vm_param.h (VM_MIN_KERNEL_ADDRESS) [MACH_XEN]: Set to 0x20000000. * i386/i386/i386asm.sym (pfn_list) [VM_MIN_KERNEL_ADDRESS == LINEAR_MIN_KERNEL_ADDRESS]: Define to constant PFN_LIST. 2009-02-27 Samuel Thibault <samuel.thibault@ens-lyon.org> * i386/intel/pmap.c [MACH_HYP] (INVALIDATE_TLB): Call hyp_invlpg instead of flush_tlb when e - s is compile-time known to be PAGE_SIZE. 2008-11-27 Samuel Thibault <samuel.thibault@ens-lyon.org> * i386/configfrag.ac (enable_pae): Enable by default on the Xen platform. 2007-11-14 Samuel Thibault <samuel.thibault@ens-lyon.org> * i386/i386at/model_dep.c (machine_relax): New function. (c_boot_entry): Refuse to boot as dom0. 2007-10-17 Samuel Thibault <samuel.thibault@ens-lyon.org> * i386/i386/fpu.c [MACH_XEN]: Disable unused fpintr(). 2007-08-12 Samuel Thibault <samuel.thibault@ens-lyon.org> * Makefile.am (clib_routines): Add _START. * i386/xen/xen_boothdr: Use _START for VIRT_BASE and PADDR_OFFSET. Add GUEST_VERSION and XEN_ELFNOTE_FEATURES. 2007-06-13 Samuel Thibault <samuel.thibault@ens-lyon.org> * i386/i386/user_ldt.h (user_ldt) [MACH_XEN]: Add alloc field. * i386/i386/user_ldt.c (i386_set_ldt) [MACH_XEN]: Round allocation of LDT to a page, set back LDT pages read/write before freeing them. (user_ldt_free) [MACH_XEN]: Likewise. 2007-04-18 Samuel Thibault <samuel.thibault@ens-lyon.org> * device/ds_routines.c [MACH_HYP]: Add hypervisor block and net devices. 2007-02-19 Thomas Schwinge <tschwinge@gnu.org> * i386/xen/Makefrag.am [PLATFORM_xen] (gnumach_LINKFLAGS): Define. * Makefrag.am: Include `xen/Makefrag.am'. * configure.ac: Include `xen/configfrag.ac'. (--enable-platform): Support the `xen' platform. * i386/configfrag.ac: Likewise. * i386/Makefrag.am [PLATFORM_xen]: Include `i386/xen/Makefrag.am'. 2007-02-19 Samuel Thibault <samuel.thibault@ens-lyon.org> Thomas Schwinge <tschwinge@gnu.org> * i386/xen/Makefrag.am: New file. * xen/Makefrag.am: Likewise. * xen/configfrag.ac: Likewise. 2007-02-11 (and later dates) Samuel Thibault <samuel.thibault@ens-lyon.org> Xen support * Makefile.am (clib_routines): Add _start. * Makefrag.am (include_mach_HEADERS): Add include/mach/xen.h. * device/cons.c (cnputc): Call hyp_console_write. * i386/Makefrag.am (libkernel_a_SOURCES): Move non-Xen source to [PLATFORM_at]. * i386/i386/debug_trace.S: Include <i386/xen.h> * i386/i386/fpu.c [MACH_HYP] (init_fpu): Call set_ts() and clear_ts(), do not enable CR0_EM. * i386/i386/gdt.c: Include <mach/xen.h> and <intel/pmap.h>. [MACH_XEN]: Make gdt array extern. [MACH_XEN] (gdt_init): Register gdt with hypervisor. Request 4gb segments assist. Shift la_shift. [MACH_PSEUDO_PHYS] (gdt_init): Shift pfn_list. * i386/i386/gdt.h [MACH_XEN]: Don't define KERNEL_LDT and LINEAR_DS. * i386/i386/i386asm.sym: Include <i386/xen.h>. [MACH_XEN]: Remove KERNEL_LDT, Add shared_info's CPU_CLI, CPU_PENDING, CPU_PENDING_SEL, PENDING, EVTMASK and CR2. * i386/i386/idt.c [MACH_HYP] (idt_init): Register trap table with hypervisor. * i386/i386/idt_inittab.S: Include <i386/i386asm.h>. [MACH_XEN]: Set IDT_ENTRY() for hypervisor. Set trap table terminator. * i386/i386/ktss.c [MACH_XEN] (ktss_init): Request exception task switch from hypervisor. * i386/i386/ldt.c: Include <mach/xen.h> and <intel/pmap.h> [MACH_XEN]: Make ldt array extern. [MACH_XEN] (ldt_init): Set ldt readwrite. [MACH_HYP] (ldt_init): Register ldt with hypervisor. * i386/i386/locore.S: Include <i386/xen.h>. Handle KERNEL_RING == 1 case. [MACH_XEN]: Read hyp_shared_info's CR2 instead of %cr2. [MACH_PSEUDO_PHYS]: Add mfn_to_pfn computation. [MACH_HYP]: Drop Cyrix I/O-based detection. Read cr3 instead of %cr3. Make hypervisor call for pte invalidation. * i386/i386/mp_desc.c: Include <mach/xen.h>. [MACH_HYP] (mp_desc_init): Panic. * i386/i386/pcb.c: Include <mach/xen.h>. [MACH_XEN] (switch_ktss): Request stack switch from hypervisor. [MACH_HYP] (switch_ktss): Request ldt and gdt switch from hypervisor. * i386/i386/phys.c: Include <mach/xen.h> [MACH_PSEUDO_PHYS] (kvtophys): Do page translation. * i386/i386/proc_reg.h [MACH_HYP] (cr3): New declaration. (set_cr3, get_cr3, set_ts, clear_ts): Implement macros. * i386/i386/seg.h [MACH_HYP]: Define KERNEL_RING macro. Include <mach/xen.h> [MACH_XEN] (fill_descriptor): Register descriptor with hypervisor. * i386/i386/spl.S: Include <i386/xen.h> and <i386/i386/asm.h> [MACH_XEN] (pic_mask): #define to int_mask. [MACH_XEN] (SETMASK): Implement. * i386/i386/vm_param.h [MACH_XEN] (HYP_VIRT_START): New macro. [MACH_XEN]: Set VM_MAX_KERNEL_ADDRESS to HYP_VIRT_START- LINEAR_MIN_KERNEL_ADDRESS + VM_MIN_KERNEL_ADDRESS. Increase KERNEL_STACK_SIZE and INTSTACK_SIZE to 4 pages. * i386/i386at/conf.c [MACH_HYP]: Remove hardware devices, add hypervisor console device. * i386/i386at/cons_conf.c [MACH_HYP]: Add hypervisor console device. * i386/i386at/model_dep.c: Include <sys/types.h>, <mach/xen.h>. [MACH_XEN] Include <xen/console.h>, <xen/store.h>, <xen/evt.h>, <xen/xen.h>. [MACH_PSEUDO_PHYS]: New boot_info, mfn_list, pfn_list variables. [MACH_XEN]: New la_shift variable. [MACH_HYP] (avail_next, mem_size_init): Drop BIOS skipping mecanism. [MACH_HYP] (machine_init): Call hyp_init(), drop hardware initialization. [MACH_HYP] (machine_idle): Call hyp_idle(). [MACH_HYP] (halt_cpu): Call hyp_halt(). [MACH_HYP] (halt_all_cpus): Call hyp_reboot() or hyp_halt(). [MACH_HYP] (i386at_init): Initialize with hypervisor. [MACH_XEN] (c_boot_entry): Add Xen-specific initialization. [MACH_HYP] (init_alloc_aligned, pmap_valid_page): Drop zones skipping mecanism. * i386/intel/pmap.c: Include <mach/xen.h>. [MACH_PSEUDO_PHYS] (WRITE_PTE): Do page translation. [MACH_HYP] (INVALIDATE_TLB): Request invalidation from hypervisor. [MACH_XEN] (pmap_map_bd, pmap_create, pmap_destroy, pmap_remove_range) (pmap_page_protect, pmap_protect, pmap_enter, pmap_change_wiring) (pmap_attribute_clear, pmap_unmap_page_zero, pmap_collect): Request MMU update from hypervisor. [MACH_XEN] (pmap_bootstrap): Request pagetable initialization from hypervisor. [MACH_XEN] (pmap_set_page_readwrite, pmap_set_page_readonly) (pmap_set_page_readonly_init, pmap_clear_bootstrap_pagetable) (pmap_map_mfn): New functions. * i386/intel/pmap.h [MACH_XEN] (INTEL_PTE_GLOBAL): Disable global page support. [MACH_PSEUDO_PHYS] (pte_to_pa): Do page translation. [MACH_XEN] (pmap_set_page_readwrite, pmap_set_page_readonly) (pmap_set_page_readonly_init, pmap_clear_bootstrap_pagetable) (pmap_map_mfn): Declare functions. * i386/i386/xen.h: New file. * i386/xen/xen.c: New file. * i386/xen/xen_boothdr.S: New file. * i386/xen/xen_locore.S: New file. * include/mach/xen.h: New file. * kern/bootstrap.c [MACH_XEN] (boot_info): Declare variable. [MACH_XEN] (bootstrap_create): Rebase multiboot header. * kern/debug.c: Include <mach/xen.h>. [MACH_HYP] (panic): Call hyp_crash() without delay. * linux/dev/include/asm-i386/segment.h [MACH_HYP] (KERNEL_CS) (KERNEL_DS): Use ring 1. * xen/block.c: New file. * xen/block.h: Likewise. * xen/console.c: Likewise. * xen/console.h: Likewise. * xen/evt.c: Likewise. * xen/evt.h: Likewise. * xen/grant.c: Likewise. * xen/grant.h: Likewise. * xen/net.c: Likewise. * xen/net.h: Likewise. * xen/ring.c: Likewise. * xen/ring.h: Likewise. * xen/store.c: Likewise. * xen/store.h: Likewise. * xen/time.c: Likewise. * xen/time.h: Likewise. * xen/xen.c: Likewise. * xen/xen.h: Likewise. * xen/public/COPYING: Import file from Xen. * xen/public/callback.h: Likewise. * xen/public/dom0_ops.h: Likewise. * xen/public/domctl.h: Likewise. * xen/public/elfnote.h: Likewise. * xen/public/elfstructs.h: Likewise. * xen/public/event_channel.h: Likewise. * xen/public/features.h: Likewise. * xen/public/grant_table.h: Likewise. * xen/public/kexec.h: Likewise. * xen/public/libelf.h: Likewise. * xen/public/memory.h: Likewise. * xen/public/nmi.h: Likewise. * xen/public/physdev.h: Likewise. * xen/public/platform.h: Likewise. * xen/public/sched.h: Likewise. * xen/public/sysctl.h: Likewise. * xen/public/trace.h: Likewise. * xen/public/vcpu.h: Likewise. * xen/public/version.h: Likewise. * xen/public/xen-compat.h: Likewise. * xen/public/xen.h: Likewise. * xen/public/xencomm.h: Likewise. * xen/public/xenoprof.h: Likewise. * xen/public/arch-x86/xen-mca.h: Likewise. * xen/public/arch-x86/xen-x86_32.h: Likewise. * xen/public/arch-x86/xen-x86_64.h: Likewise. * xen/public/arch-x86/xen.h: Likewise. * xen/public/arch-x86_32.h: Likewise. * xen/public/arch-x86_64.h: Likewise. * xen/public/io/blkif.h: Likewise. * xen/public/io/console.h: Likewise. * xen/public/io/fbif.h: Likewise. * xen/public/io/fsif.h: Likewise. * xen/public/io/kbdif.h: Likewise. * xen/public/io/netif.h: Likewise. * xen/public/io/pciif.h: Likewise. * xen/public/io/protocols.h: Likewise. * xen/public/io/ring.h: Likewise. * xen/public/io/tpmif.h: Likewise. * xen/public/io/xenbus.h: Likewise. * xen/public/io/xs_wire.h: Likewise.
Diffstat (limited to 'xen/public/trace.h')
-rw-r--r--xen/public/trace.h206
1 files changed, 206 insertions, 0 deletions
diff --git a/xen/public/trace.h b/xen/public/trace.h
new file mode 100644
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--- /dev/null
+++ b/xen/public/trace.h
@@ -0,0 +1,206 @@
+/******************************************************************************
+ * include/public/trace.h
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Mark Williamson, (C) 2004 Intel Research Cambridge
+ * Copyright (C) 2005 Bin Ren
+ */
+
+#ifndef __XEN_PUBLIC_TRACE_H__
+#define __XEN_PUBLIC_TRACE_H__
+
+#define TRACE_EXTRA_MAX 7
+#define TRACE_EXTRA_SHIFT 28
+
+/* Trace classes */
+#define TRC_CLS_SHIFT 16
+#define TRC_GEN 0x0001f000 /* General trace */
+#define TRC_SCHED 0x0002f000 /* Xen Scheduler trace */
+#define TRC_DOM0OP 0x0004f000 /* Xen DOM0 operation trace */
+#define TRC_HVM 0x0008f000 /* Xen HVM trace */
+#define TRC_MEM 0x0010f000 /* Xen memory trace */
+#define TRC_PV 0x0020f000 /* Xen PV traces */
+#define TRC_SHADOW 0x0040f000 /* Xen shadow tracing */
+#define TRC_PM 0x0080f000 /* Xen power management trace */
+#define TRC_ALL 0x0ffff000
+#define TRC_HD_TO_EVENT(x) ((x)&0x0fffffff)
+#define TRC_HD_CYCLE_FLAG (1UL<<31)
+#define TRC_HD_INCLUDES_CYCLE_COUNT(x) ( !!( (x) & TRC_HD_CYCLE_FLAG ) )
+#define TRC_HD_EXTRA(x) (((x)>>TRACE_EXTRA_SHIFT)&TRACE_EXTRA_MAX)
+
+/* Trace subclasses */
+#define TRC_SUBCLS_SHIFT 12
+
+/* trace subclasses for SVM */
+#define TRC_HVM_ENTRYEXIT 0x00081000 /* VMENTRY and #VMEXIT */
+#define TRC_HVM_HANDLER 0x00082000 /* various HVM handlers */
+
+#define TRC_SCHED_MIN 0x00021000 /* Just runstate changes */
+#define TRC_SCHED_VERBOSE 0x00028000 /* More inclusive scheduling */
+
+/* Trace events per class */
+#define TRC_LOST_RECORDS (TRC_GEN + 1)
+#define TRC_TRACE_WRAP_BUFFER (TRC_GEN + 2)
+#define TRC_TRACE_CPU_CHANGE (TRC_GEN + 3)
+
+#define TRC_SCHED_RUNSTATE_CHANGE (TRC_SCHED_MIN + 1)
+#define TRC_SCHED_DOM_ADD (TRC_SCHED_VERBOSE + 1)
+#define TRC_SCHED_DOM_REM (TRC_SCHED_VERBOSE + 2)
+#define TRC_SCHED_SLEEP (TRC_SCHED_VERBOSE + 3)
+#define TRC_SCHED_WAKE (TRC_SCHED_VERBOSE + 4)
+#define TRC_SCHED_YIELD (TRC_SCHED_VERBOSE + 5)
+#define TRC_SCHED_BLOCK (TRC_SCHED_VERBOSE + 6)
+#define TRC_SCHED_SHUTDOWN (TRC_SCHED_VERBOSE + 7)
+#define TRC_SCHED_CTL (TRC_SCHED_VERBOSE + 8)
+#define TRC_SCHED_ADJDOM (TRC_SCHED_VERBOSE + 9)
+#define TRC_SCHED_SWITCH (TRC_SCHED_VERBOSE + 10)
+#define TRC_SCHED_S_TIMER_FN (TRC_SCHED_VERBOSE + 11)
+#define TRC_SCHED_T_TIMER_FN (TRC_SCHED_VERBOSE + 12)
+#define TRC_SCHED_DOM_TIMER_FN (TRC_SCHED_VERBOSE + 13)
+#define TRC_SCHED_SWITCH_INFPREV (TRC_SCHED_VERBOSE + 14)
+#define TRC_SCHED_SWITCH_INFNEXT (TRC_SCHED_VERBOSE + 15)
+
+#define TRC_MEM_PAGE_GRANT_MAP (TRC_MEM + 1)
+#define TRC_MEM_PAGE_GRANT_UNMAP (TRC_MEM + 2)
+#define TRC_MEM_PAGE_GRANT_TRANSFER (TRC_MEM + 3)
+
+#define TRC_PV_HYPERCALL (TRC_PV + 1)
+#define TRC_PV_TRAP (TRC_PV + 3)
+#define TRC_PV_PAGE_FAULT (TRC_PV + 4)
+#define TRC_PV_FORCED_INVALID_OP (TRC_PV + 5)
+#define TRC_PV_EMULATE_PRIVOP (TRC_PV + 6)
+#define TRC_PV_EMULATE_4GB (TRC_PV + 7)
+#define TRC_PV_MATH_STATE_RESTORE (TRC_PV + 8)
+#define TRC_PV_PAGING_FIXUP (TRC_PV + 9)
+#define TRC_PV_GDT_LDT_MAPPING_FAULT (TRC_PV + 10)
+#define TRC_PV_PTWR_EMULATION (TRC_PV + 11)
+#define TRC_PV_PTWR_EMULATION_PAE (TRC_PV + 12)
+ /* Indicates that addresses in trace record are 64 bits */
+#define TRC_64_FLAG (0x100)
+
+#define TRC_SHADOW_NOT_SHADOW (TRC_SHADOW + 1)
+#define TRC_SHADOW_FAST_PROPAGATE (TRC_SHADOW + 2)
+#define TRC_SHADOW_FAST_MMIO (TRC_SHADOW + 3)
+#define TRC_SHADOW_FALSE_FAST_PATH (TRC_SHADOW + 4)
+#define TRC_SHADOW_MMIO (TRC_SHADOW + 5)
+#define TRC_SHADOW_FIXUP (TRC_SHADOW + 6)
+#define TRC_SHADOW_DOMF_DYING (TRC_SHADOW + 7)
+#define TRC_SHADOW_EMULATE (TRC_SHADOW + 8)
+#define TRC_SHADOW_EMULATE_UNSHADOW_USER (TRC_SHADOW + 9)
+#define TRC_SHADOW_EMULATE_UNSHADOW_EVTINJ (TRC_SHADOW + 10)
+#define TRC_SHADOW_EMULATE_UNSHADOW_UNHANDLED (TRC_SHADOW + 11)
+#define TRC_SHADOW_WRMAP_BF (TRC_SHADOW + 12)
+#define TRC_SHADOW_PREALLOC_UNPIN (TRC_SHADOW + 13)
+#define TRC_SHADOW_RESYNC_FULL (TRC_SHADOW + 14)
+#define TRC_SHADOW_RESYNC_ONLY (TRC_SHADOW + 15)
+
+/* trace events per subclass */
+#define TRC_HVM_VMENTRY (TRC_HVM_ENTRYEXIT + 0x01)
+#define TRC_HVM_VMEXIT (TRC_HVM_ENTRYEXIT + 0x02)
+#define TRC_HVM_VMEXIT64 (TRC_HVM_ENTRYEXIT + TRC_64_FLAG + 0x02)
+#define TRC_HVM_PF_XEN (TRC_HVM_HANDLER + 0x01)
+#define TRC_HVM_PF_XEN64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x01)
+#define TRC_HVM_PF_INJECT (TRC_HVM_HANDLER + 0x02)
+#define TRC_HVM_PF_INJECT64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x02)
+#define TRC_HVM_INJ_EXC (TRC_HVM_HANDLER + 0x03)
+#define TRC_HVM_INJ_VIRQ (TRC_HVM_HANDLER + 0x04)
+#define TRC_HVM_REINJ_VIRQ (TRC_HVM_HANDLER + 0x05)
+#define TRC_HVM_IO_READ (TRC_HVM_HANDLER + 0x06)
+#define TRC_HVM_IO_WRITE (TRC_HVM_HANDLER + 0x07)
+#define TRC_HVM_CR_READ (TRC_HVM_HANDLER + 0x08)
+#define TRC_HVM_CR_READ64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x08)
+#define TRC_HVM_CR_WRITE (TRC_HVM_HANDLER + 0x09)
+#define TRC_HVM_CR_WRITE64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x09)
+#define TRC_HVM_DR_READ (TRC_HVM_HANDLER + 0x0A)
+#define TRC_HVM_DR_WRITE (TRC_HVM_HANDLER + 0x0B)
+#define TRC_HVM_MSR_READ (TRC_HVM_HANDLER + 0x0C)
+#define TRC_HVM_MSR_WRITE (TRC_HVM_HANDLER + 0x0D)
+#define TRC_HVM_CPUID (TRC_HVM_HANDLER + 0x0E)
+#define TRC_HVM_INTR (TRC_HVM_HANDLER + 0x0F)
+#define TRC_HVM_NMI (TRC_HVM_HANDLER + 0x10)
+#define TRC_HVM_SMI (TRC_HVM_HANDLER + 0x11)
+#define TRC_HVM_VMMCALL (TRC_HVM_HANDLER + 0x12)
+#define TRC_HVM_HLT (TRC_HVM_HANDLER + 0x13)
+#define TRC_HVM_INVLPG (TRC_HVM_HANDLER + 0x14)
+#define TRC_HVM_INVLPG64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x14)
+#define TRC_HVM_MCE (TRC_HVM_HANDLER + 0x15)
+#define TRC_HVM_IO_ASSIST (TRC_HVM_HANDLER + 0x16)
+#define TRC_HVM_IO_ASSIST64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x16)
+#define TRC_HVM_MMIO_ASSIST (TRC_HVM_HANDLER + 0x17)
+#define TRC_HVM_MMIO_ASSIST64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x17)
+#define TRC_HVM_CLTS (TRC_HVM_HANDLER + 0x18)
+#define TRC_HVM_LMSW (TRC_HVM_HANDLER + 0x19)
+#define TRC_HVM_LMSW64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x19)
+
+/* trace subclasses for power management */
+#define TRC_PM_FREQ 0x00801000 /* xen cpu freq events */
+#define TRC_PM_IDLE 0x00802000 /* xen cpu idle events */
+
+/* trace events for per class */
+#define TRC_PM_FREQ_CHANGE (TRC_PM_FREQ + 0x01)
+#define TRC_PM_IDLE_ENTRY (TRC_PM_IDLE + 0x01)
+#define TRC_PM_IDLE_EXIT (TRC_PM_IDLE + 0x02)
+
+/* This structure represents a single trace buffer record. */
+struct t_rec {
+ uint32_t event:28;
+ uint32_t extra_u32:3; /* # entries in trailing extra_u32[] array */
+ uint32_t cycles_included:1; /* u.cycles or u.no_cycles? */
+ union {
+ struct {
+ uint32_t cycles_lo, cycles_hi; /* cycle counter timestamp */
+ uint32_t extra_u32[7]; /* event data items */
+ } cycles;
+ struct {
+ uint32_t extra_u32[7]; /* event data items */
+ } nocycles;
+ } u;
+};
+
+/*
+ * This structure contains the metadata for a single trace buffer. The head
+ * field, indexes into an array of struct t_rec's.
+ */
+struct t_buf {
+ /* Assume the data buffer size is X. X is generally not a power of 2.
+ * CONS and PROD are incremented modulo (2*X):
+ * 0 <= cons < 2*X
+ * 0 <= prod < 2*X
+ * This is done because addition modulo X breaks at 2^32 when X is not a
+ * power of 2:
+ * (((2^32 - 1) % X) + 1) % X != (2^32) % X
+ */
+ uint32_t cons; /* Offset of next item to be consumed by control tools. */
+ uint32_t prod; /* Offset of next item to be produced by Xen. */
+ /* Records follow immediately after the meta-data header. */
+};
+
+#endif /* __XEN_PUBLIC_TRACE_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
+ */