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xen/trace: add segment desc tracing

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Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2010-12-17 15:54:28 -08:00
parent 5f94fb5b8e
commit ab78f7ad2c
2 changed files with 90 additions and 1 deletions
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16
arch/x86/xen/enlighten.c
View file

@ -341,6 +341,8 @@ static void xen_set_ldt(const void *addr, unsigned entries)
struct mmuext_op *op;
struct multicall_space mcs = xen_mc_entry(sizeof(*op));
trace_xen_cpu_set_ldt(addr, entries);
op = mcs.args;
op->cmd = MMUEXT_SET_LDT;
op->arg1.linear_addr = (unsigned long)addr;
@ -496,6 +498,8 @@ static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
xmaddr_t mach_lp = arbitrary_virt_to_machine(&dt[entrynum]);
u64 entry = *(u64 *)ptr;
trace_xen_cpu_write_ldt_entry(dt, entrynum, entry);
preempt_disable();
xen_mc_flush();
@ -565,6 +569,8 @@ static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
unsigned long p = (unsigned long)&dt[entrynum];
unsigned long start, end;
trace_xen_cpu_write_idt_entry(dt, entrynum, g);
preempt_disable();
start = __this_cpu_read(idt_desc.address);
@ -619,6 +625,8 @@ static void xen_load_idt(const struct desc_ptr *desc)
static DEFINE_SPINLOCK(lock);
static struct trap_info traps[257];
trace_xen_cpu_load_idt(desc);
spin_lock(&lock);
__get_cpu_var(idt_desc) = *desc;
@ -637,6 +645,8 @@ static void xen_load_idt(const struct desc_ptr *desc)
static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
const void *desc, int type)
{
trace_xen_cpu_write_gdt_entry(dt, entry, desc, type);
preempt_disable();
switch (type) {
@ -665,6 +675,8 @@ static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
static void __init xen_write_gdt_entry_boot(struct desc_struct *dt, int entry,
const void *desc, int type)
{
trace_xen_cpu_write_gdt_entry(dt, entry, desc, type);
switch (type) {
case DESC_LDT:
case DESC_TSS:
@ -684,7 +696,9 @@ static void __init xen_write_gdt_entry_boot(struct desc_struct *dt, int entry,
static void xen_load_sp0(struct tss_struct *tss,
struct thread_struct *thread)
{
struct multicall_space mcs = xen_mc_entry(0);
struct multicall_space mcs;
mcs = xen_mc_entry(0);
MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->sp0);
xen_mc_issue(PARAVIRT_LAZY_CPU);
}

75
include/trace/events/xen.h
View file

@ -405,6 +405,81 @@ TRACE_EVENT(xen_mmu_pgd_unpin,
TP_printk("mm %p pgd %p", __entry->mm, __entry->pgd)
);
/* CPU */
TRACE_EVENT(xen_cpu_write_ldt_entry,
TP_PROTO(struct desc_struct *dt, int entrynum, u64 desc),
TP_ARGS(dt, entrynum, desc),
TP_STRUCT__entry(
__field(struct desc_struct *, dt)
__field(int, entrynum)
__field(u64, desc)
),
TP_fast_assign(__entry->dt = dt;
__entry->entrynum = entrynum;
__entry->desc = desc;
),
TP_printk("dt %p entrynum %d entry %016llx",
__entry->dt, __entry->entrynum,
(unsigned long long)__entry->desc)
);
TRACE_EVENT(xen_cpu_write_idt_entry,
TP_PROTO(gate_desc *dt, int entrynum, const gate_desc *ent),
TP_ARGS(dt, entrynum, ent),
TP_STRUCT__entry(
__field(gate_desc *, dt)
__field(int, entrynum)
),
TP_fast_assign(__entry->dt = dt;
__entry->entrynum = entrynum;
),
TP_printk("dt %p entrynum %d",
__entry->dt, __entry->entrynum)
);
TRACE_EVENT(xen_cpu_load_idt,
TP_PROTO(const struct desc_ptr *desc),
TP_ARGS(desc),
TP_STRUCT__entry(
__field(unsigned long, addr)
),
TP_fast_assign(__entry->addr = desc->address),
TP_printk("addr %lx", __entry->addr)
);
TRACE_EVENT(xen_cpu_write_gdt_entry,
TP_PROTO(struct desc_struct *dt, int entrynum, const void *desc, int type),
TP_ARGS(dt, entrynum, desc, type),
TP_STRUCT__entry(
__field(u64, desc)
__field(struct desc_struct *, dt)
__field(int, entrynum)
__field(int, type)
),
TP_fast_assign(__entry->dt = dt;
__entry->entrynum = entrynum;
__entry->desc = *(u64 *)desc;
__entry->type = type;
),
TP_printk("dt %p entrynum %d type %d desc %016llx",
__entry->dt, __entry->entrynum, __entry->type,
(unsigned long long)__entry->desc)
);
TRACE_EVENT(xen_cpu_set_ldt,
TP_PROTO(const void *addr, unsigned entries),
TP_ARGS(addr, entries),
TP_STRUCT__entry(
__field(const void *, addr)
__field(unsigned, entries)
),
TP_fast_assign(__entry->addr = addr;
__entry->entries = entries),
TP_printk("addr %p entries %u",
__entry->addr, __entry->entries)
);
#endif /* _TRACE_XEN_H */
/* This part must be outside protection */