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-rw-r--r--arch/x86/include/asm/xen/hypercall.h22
-rw-r--r--arch/x86/include/asm/xen/trace_types.h18
-rw-r--r--arch/x86/xen/multicalls.c31
-rw-r--r--arch/x86/xen/multicalls.h3
-rw-r--r--arch/x86/xen/trace.c57
5 files changed, 123 insertions, 8 deletions
diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index d240ea95051..417777de5a4 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -39,6 +39,8 @@
#include <linux/string.h>
#include <linux/types.h>
+#include <trace/events/xen.h>
+
#include <asm/page.h>
#include <asm/pgtable.h>
@@ -459,6 +461,8 @@ MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
{
mcl->op = __HYPERVISOR_fpu_taskswitch;
mcl->args[0] = set;
+
+ trace_xen_mc_entry(mcl, 1);
}
static inline void
@@ -475,6 +479,8 @@ MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
mcl->args[2] = new_val.pte >> 32;
mcl->args[3] = flags;
}
+
+ trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
}
static inline void
@@ -485,6 +491,8 @@ MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
mcl->args[0] = cmd;
mcl->args[1] = (unsigned long)uop;
mcl->args[2] = count;
+
+ trace_xen_mc_entry(mcl, 3);
}
static inline void
@@ -504,6 +512,8 @@ MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long v
mcl->args[3] = flags;
mcl->args[4] = domid;
}
+
+ trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 4 : 5);
}
static inline void
@@ -520,6 +530,8 @@ MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
mcl->args[2] = desc.a;
mcl->args[3] = desc.b;
}
+
+ trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
}
static inline void
@@ -528,6 +540,8 @@ MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
mcl->op = __HYPERVISOR_memory_op;
mcl->args[0] = cmd;
mcl->args[1] = (unsigned long)arg;
+
+ trace_xen_mc_entry(mcl, 2);
}
static inline void
@@ -539,6 +553,8 @@ MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
mcl->args[1] = count;
mcl->args[2] = (unsigned long)success_count;
mcl->args[3] = domid;
+
+ trace_xen_mc_entry(mcl, 4);
}
static inline void
@@ -550,6 +566,8 @@ MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
mcl->args[1] = count;
mcl->args[2] = (unsigned long)success_count;
mcl->args[3] = domid;
+
+ trace_xen_mc_entry(mcl, 4);
}
static inline void
@@ -558,6 +576,8 @@ MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
mcl->op = __HYPERVISOR_set_gdt;
mcl->args[0] = (unsigned long)frames;
mcl->args[1] = entries;
+
+ trace_xen_mc_entry(mcl, 2);
}
static inline void
@@ -567,6 +587,8 @@ MULTI_stack_switch(struct multicall_entry *mcl,
mcl->op = __HYPERVISOR_stack_switch;
mcl->args[0] = ss;
mcl->args[1] = esp;
+
+ trace_xen_mc_entry(mcl, 2);
}
#endif /* _ASM_X86_XEN_HYPERCALL_H */
diff --git a/arch/x86/include/asm/xen/trace_types.h b/arch/x86/include/asm/xen/trace_types.h
new file mode 100644
index 00000000000..21e1874c0a0
--- /dev/null
+++ b/arch/x86/include/asm/xen/trace_types.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_XEN_TRACE_TYPES_H
+#define _ASM_XEN_TRACE_TYPES_H
+
+enum xen_mc_flush_reason {
+ XEN_MC_FL_NONE, /* explicit flush */
+ XEN_MC_FL_BATCH, /* out of hypercall space */
+ XEN_MC_FL_ARGS, /* out of argument space */
+ XEN_MC_FL_CALLBACK, /* out of callback space */
+};
+
+enum xen_mc_extend_args {
+ XEN_MC_XE_OK,
+ XEN_MC_XE_BAD_OP,
+ XEN_MC_XE_NO_SPACE
+};
+typedef void (*xen_mc_callback_fn_t)(void *);
+
+#endif /* _ASM_XEN_TRACE_TYPES_H */
diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c
index b9bf19884bc..7074c7ebfff 100644
--- a/arch/x86/xen/multicalls.c
+++ b/arch/x86/xen/multicalls.c
@@ -65,6 +65,8 @@ void xen_mc_flush(void)
something in the middle */
local_irq_save(flags);
+ trace_xen_mc_flush(b->mcidx, b->argidx, b->cbidx);
+
if (b->mcidx) {
#if MC_DEBUG
memcpy(b->debug, b->entries,
@@ -116,11 +118,15 @@ struct multicall_space __xen_mc_entry(size_t args)
struct multicall_space ret;
unsigned argidx = roundup(b->argidx, sizeof(u64));
+ trace_xen_mc_entry_alloc(args);
+
BUG_ON(preemptible());
BUG_ON(b->argidx >= MC_ARGS);
if (b->mcidx == MC_BATCH ||
(argidx + args) >= MC_ARGS) {
+ trace_xen_mc_flush_reason((b->mcidx == MC_BATCH) ?
+ XEN_MC_FL_BATCH : XEN_MC_FL_ARGS);
xen_mc_flush();
argidx = roundup(b->argidx, sizeof(u64));
}
@@ -145,20 +151,25 @@ struct multicall_space xen_mc_extend_args(unsigned long op, size_t size)
BUG_ON(preemptible());
BUG_ON(b->argidx >= MC_ARGS);
- if (b->mcidx == 0)
- return ret;
-
- if (b->entries[b->mcidx - 1].op != op)
- return ret;
+ if (unlikely(b->mcidx == 0 ||
+ b->entries[b->mcidx - 1].op != op)) {
+ trace_xen_mc_extend_args(op, size, XEN_MC_XE_BAD_OP);
+ goto out;
+ }
- if ((b->argidx + size) >= MC_ARGS)
- return ret;
+ if (unlikely((b->argidx + size) >= MC_ARGS)) {
+ trace_xen_mc_extend_args(op, size, XEN_MC_XE_NO_SPACE);
+ goto out;
+ }
ret.mc = &b->entries[b->mcidx - 1];
ret.args = &b->args[b->argidx];
b->argidx += size;
BUG_ON(b->argidx >= MC_ARGS);
+
+ trace_xen_mc_extend_args(op, size, XEN_MC_XE_OK);
+out:
return ret;
}
@@ -167,8 +178,12 @@ void xen_mc_callback(void (*fn)(void *), void *data)
struct mc_buffer *b = &__get_cpu_var(mc_buffer);
struct callback *cb;
- if (b->cbidx == MC_BATCH)
+ if (b->cbidx == MC_BATCH) {
+ trace_xen_mc_flush_reason(XEN_MC_FL_CALLBACK);
xen_mc_flush();
+ }
+
+ trace_xen_mc_callback(fn, data);
cb = &b->callbacks[b->cbidx++];
cb->fn = fn;
diff --git a/arch/x86/xen/multicalls.h b/arch/x86/xen/multicalls.h
index fa7b8af759e..dee79b78a90 100644
--- a/arch/x86/xen/multicalls.h
+++ b/arch/x86/xen/multicalls.h
@@ -25,6 +25,7 @@ static inline void xen_mc_batch(void)
/* need to disable interrupts until this entry is complete */
local_irq_save(flags);
+ trace_xen_mc_batch(paravirt_get_lazy_mode());
__this_cpu_write(xen_mc_irq_flags, flags);
}
@@ -40,6 +41,8 @@ void xen_mc_flush(void);
/* Issue a multicall if we're not in a lazy mode */
static inline void xen_mc_issue(unsigned mode)
{
+ trace_xen_mc_issue(mode);
+
if ((paravirt_get_lazy_mode() & mode) == 0)
xen_mc_flush();
diff --git a/arch/x86/xen/trace.c b/arch/x86/xen/trace.c
index 8cca6164022..734beba2a08 100644
--- a/arch/x86/xen/trace.c
+++ b/arch/x86/xen/trace.c
@@ -1,4 +1,61 @@
#include <linux/ftrace.h>
+#define N(x) [__HYPERVISOR_##x] = "("#x")"
+static const char *xen_hypercall_names[] = {
+ N(set_trap_table),
+ N(mmu_update),
+ N(set_gdt),
+ N(stack_switch),
+ N(set_callbacks),
+ N(fpu_taskswitch),
+ N(sched_op_compat),
+ N(dom0_op),
+ N(set_debugreg),
+ N(get_debugreg),
+ N(update_descriptor),
+ N(memory_op),
+ N(multicall),
+ N(update_va_mapping),
+ N(set_timer_op),
+ N(event_channel_op_compat),
+ N(xen_version),
+ N(console_io),
+ N(physdev_op_compat),
+ N(grant_table_op),
+ N(vm_assist),
+ N(update_va_mapping_otherdomain),
+ N(iret),
+ N(vcpu_op),
+ N(set_segment_base),
+ N(mmuext_op),
+ N(acm_op),
+ N(nmi_op),
+ N(sched_op),
+ N(callback_op),
+ N(xenoprof_op),
+ N(event_channel_op),
+ N(physdev_op),
+ N(hvm_op),
+
+/* Architecture-specific hypercall definitions. */
+ N(arch_0),
+ N(arch_1),
+ N(arch_2),
+ N(arch_3),
+ N(arch_4),
+ N(arch_5),
+ N(arch_6),
+ N(arch_7),
+};
+#undef N
+
+static const char *xen_hypercall_name(unsigned op)
+{
+ if (op < ARRAY_SIZE(xen_hypercall_names) && xen_hypercall_names[op] != NULL)
+ return xen_hypercall_names[op];
+
+ return "";
+}
+
#define CREATE_TRACE_POINTS
#include <trace/events/xen.h>
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-16 12:47:44 +0000