Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-10 14:11:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

KVM: convert custom marker based tracing to event traces

Browse Source 
This allows use of the powerful ftrace infrastructure.

See Documentation/trace/ for usage information.

[avi, stephen: various build fixes]
[sheng: fix control register breakage]

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Marcelo Tosatti 2009-06-17 09:22:14 -03:00 committed by Avi Kivity
parent 219b65dcf6
commit 229456fc34
10 changed files with 463 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/kvm_host.h
View File

@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/mmu_notifier.h>
#include <linux/tracepoint.h>
#include <linux/kvm.h>
#include <linux/kvm_para.h>
@ -527,6 +528,7 @@ struct kvm_x86_ops {
int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
int (*get_tdp_level)(void);
u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
const struct trace_print_flags *exit_reasons_str;
};
extern struct kvm_x86_ops *kvm_x86_ops;

4
arch/x86/kvm/Makefile
View File

@ -1,6 +1,10 @@
EXTRA_CFLAGS += -Ivirt/kvm -Iarch/x86/kvm
CFLAGS_x86.o := -I.
CFLAGS_svm.o := -I.
CFLAGS_vmx.o := -I.
kvm-y += $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
coalesced_mmio.o irq_comm.o eventfd.o)
kvm-$(CONFIG_KVM_TRACE) += $(addprefix ../../../virt/kvm/, kvm_trace.o)

7
arch/x86/kvm/lapic.c
View File

@ -34,6 +34,7 @@
#include <asm/atomic.h>
#include "kvm_cache_regs.h"
#include "irq.h"
#include "trace.h"
#ifndef CONFIG_X86_64
#define mod_64(x, y) ((x) - (y) * div64_u64(x, y))
@ -515,8 +516,6 @@ static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset)
{
u32 val = 0;
KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler);
if (offset >= LAPIC_MMIO_LENGTH)
return 0;
@ -562,6 +561,8 @@ static void apic_mmio_read(struct kvm_io_device *this,
}
result = __apic_read(apic, offset & ~0xf);
trace_kvm_apic_read(offset, result);
switch (len) {
case 1:
case 2:
@ -657,7 +658,7 @@ static void apic_mmio_write(struct kvm_io_device *this,
offset &= 0xff0;
KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler);
trace_kvm_apic_write(offset, val);
switch (offset) {
case APIC_ID: /* Local APIC ID */

84
arch/x86/kvm/svm.c
View File

@ -25,10 +25,12 @@
#include <linux/vmalloc.h>
#include <linux/highmem.h>
#include <linux/sched.h>
#include <linux/ftrace_event.h>
#include <asm/desc.h>
#include <asm/virtext.h>
#include "trace.h"
#define __ex(x) __kvm_handle_fault_on_reboot(x)
@ -1096,7 +1098,6 @@ static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
val = 0;
}
KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler);
return val;
}
@ -1105,8 +1106,6 @@ static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
{
struct vcpu_svm *svm = to_svm(vcpu);
KVMTRACE_2D(DR_WRITE, vcpu, (u32)dr, (u32)value, handler);
*exception = 0;
switch (dr) {
@ -1154,14 +1153,7 @@ static int pf_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
fault_address = svm->vmcb->control.exit_info_2;
error_code = svm->vmcb->control.exit_info_1;
if (!npt_enabled)
KVMTRACE_3D(PAGE_FAULT, &svm->vcpu, error_code,
(u32)fault_address, (u32)(fault_address >> 32),
handler);
else
KVMTRACE_3D(TDP_FAULT, &svm->vcpu, error_code,
(u32)fault_address, (u32)(fault_address >> 32),
handler);
trace_kvm_page_fault(fault_address, error_code);
/*
* FIXME: Tis shouldn't be necessary here, but there is a flush
* missing in the MMU code. Until we find this bug, flush the
@ -1288,14 +1280,12 @@ static int io_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
static int nmi_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
{
KVMTRACE_0D(NMI, &svm->vcpu, handler);
return 1;
}
static int intr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
{
++svm->vcpu.stat.irq_exits;
KVMTRACE_0D(INTR, &svm->vcpu, handler);
return 1;
}
@ -2077,8 +2067,7 @@ static int rdmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
if (svm_get_msr(&svm->vcpu, ecx, &data))
kvm_inject_gp(&svm->vcpu, 0);
else {
KVMTRACE_3D(MSR_READ, &svm->vcpu, ecx, (u32)data,
(u32)(data >> 32), handler);
trace_kvm_msr_read(ecx, data);
svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff;
svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32;
@ -2163,8 +2152,7 @@ static int wrmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u)
| ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32);
KVMTRACE_3D(MSR_WRITE, &svm->vcpu, ecx, (u32)data, (u32)(data >> 32),
handler);
trace_kvm_msr_write(ecx, data);
svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
if (svm_set_msr(&svm->vcpu, ecx, data))
@ -2185,8 +2173,6 @@ static int msr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
static int interrupt_window_interception(struct vcpu_svm *svm,
struct kvm_run *kvm_run)
{
KVMTRACE_0D(PEND_INTR, &svm->vcpu, handler);
svm_clear_vintr(svm);
svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
/*
@ -2265,8 +2251,7 @@ static int handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
struct vcpu_svm *svm = to_svm(vcpu);
u32 exit_code = svm->vmcb->control.exit_code;
KVMTRACE_3D(VMEXIT, vcpu, exit_code, (u32)svm->vmcb->save.rip,
(u32)((u64)svm->vmcb->save.rip >> 32), entryexit);
trace_kvm_exit(exit_code, svm->vmcb->save.rip);
if (is_nested(svm)) {
nsvm_printk("nested handle_exit: 0x%x | 0x%lx | 0x%lx | 0x%lx\n",
@ -2354,7 +2339,7 @@ static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
{
struct vmcb_control_area *control;
KVMTRACE_1D(INJ_VIRQ, &svm->vcpu, (u32)irq, handler);
trace_kvm_inj_virq(irq);
++svm->vcpu.stat.irq_injections;
control = &svm->vmcb->control;
@ -2717,6 +2702,59 @@ static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
return 0;
}
static const struct trace_print_flags svm_exit_reasons_str[] = {
{ SVM_EXIT_READ_CR0, "read_cr0" },
{ SVM_EXIT_READ_CR3, "read_cr3" },
{ SVM_EXIT_READ_CR4, "read_cr4" },
{ SVM_EXIT_READ_CR8, "read_cr8" },
{ SVM_EXIT_WRITE_CR0, "write_cr0" },
{ SVM_EXIT_WRITE_CR3, "write_cr3" },
{ SVM_EXIT_WRITE_CR4, "write_cr4" },
{ SVM_EXIT_WRITE_CR8, "write_cr8" },
{ SVM_EXIT_READ_DR0, "read_dr0" },
{ SVM_EXIT_READ_DR1, "read_dr1" },
{ SVM_EXIT_READ_DR2, "read_dr2" },
{ SVM_EXIT_READ_DR3, "read_dr3" },
{ SVM_EXIT_WRITE_DR0, "write_dr0" },
{ SVM_EXIT_WRITE_DR1, "write_dr1" },
{ SVM_EXIT_WRITE_DR2, "write_dr2" },
{ SVM_EXIT_WRITE_DR3, "write_dr3" },
{ SVM_EXIT_WRITE_DR5, "write_dr5" },
{ SVM_EXIT_WRITE_DR7, "write_dr7" },
{ SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" },
{ SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" },
{ SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" },
{ SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" },
{ SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" },
{ SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" },
{ SVM_EXIT_INTR, "interrupt" },
{ SVM_EXIT_NMI, "nmi" },
{ SVM_EXIT_SMI, "smi" },
{ SVM_EXIT_INIT, "init" },
{ SVM_EXIT_VINTR, "vintr" },
{ SVM_EXIT_CPUID, "cpuid" },
{ SVM_EXIT_INVD, "invd" },
{ SVM_EXIT_HLT, "hlt" },
{ SVM_EXIT_INVLPG, "invlpg" },
{ SVM_EXIT_INVLPGA, "invlpga" },
{ SVM_EXIT_IOIO, "io" },
{ SVM_EXIT_MSR, "msr" },
{ SVM_EXIT_TASK_SWITCH, "task_switch" },
{ SVM_EXIT_SHUTDOWN, "shutdown" },
{ SVM_EXIT_VMRUN, "vmrun" },
{ SVM_EXIT_VMMCALL, "hypercall" },
{ SVM_EXIT_VMLOAD, "vmload" },
{ SVM_EXIT_VMSAVE, "vmsave" },
{ SVM_EXIT_STGI, "stgi" },
{ SVM_EXIT_CLGI, "clgi" },
{ SVM_EXIT_SKINIT, "skinit" },
{ SVM_EXIT_WBINVD, "wbinvd" },
{ SVM_EXIT_MONITOR, "monitor" },
{ SVM_EXIT_MWAIT, "mwait" },
{ SVM_EXIT_NPF, "npf" },
{ -1, NULL }
};
static struct kvm_x86_ops svm_x86_ops = {
.cpu_has_kvm_support = has_svm,
.disabled_by_bios = is_disabled,
@ -2778,6 +2816,8 @@ static struct kvm_x86_ops svm_x86_ops = {
.set_tss_addr = svm_set_tss_addr,
.get_tdp_level = get_npt_level,
.get_mt_mask = svm_get_mt_mask,
.exit_reasons_str = svm_exit_reasons_str,
};
static int __init svm_init(void)

260
arch/x86/kvm/trace.h Normal file
View File

@ -0,0 +1,260 @@
#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_KVM_H
#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM kvm
#define TRACE_INCLUDE_PATH arch/x86/kvm
#define TRACE_INCLUDE_FILE trace
/*
* Tracepoint for guest mode entry.
*/
TRACE_EVENT(kvm_entry,
TP_PROTO(unsigned int vcpu_id),
TP_ARGS(vcpu_id),
TP_STRUCT__entry(
__field( unsigned int, vcpu_id )
),
TP_fast_assign(
__entry->vcpu_id = vcpu_id;
),
TP_printk("vcpu %u", __entry->vcpu_id)
);
/*
* Tracepoint for hypercall.
*/
TRACE_EVENT(kvm_hypercall,
TP_PROTO(unsigned long nr, unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3),
TP_ARGS(nr, a0, a1, a2, a3),
TP_STRUCT__entry(
__field( unsigned long, nr )
__field( unsigned long, a0 )
__field( unsigned long, a1 )
__field( unsigned long, a2 )
__field( unsigned long, a3 )
),
TP_fast_assign(
__entry->nr = nr;
__entry->a0 = a0;
__entry->a1 = a1;
__entry->a2 = a2;
__entry->a3 = a3;
),
TP_printk("nr 0x%lx a0 0x%lx a1 0x%lx a2 0x%lx a3 0x%lx",
__entry->nr, __entry->a0, __entry->a1, __entry->a2,
__entry->a3)
);
/*
* Tracepoint for PIO.
*/
TRACE_EVENT(kvm_pio,
TP_PROTO(unsigned int rw, unsigned int port, unsigned int size,
unsigned int count),
TP_ARGS(rw, port, size, count),
TP_STRUCT__entry(
__field( unsigned int, rw )
__field( unsigned int, port )
__field( unsigned int, size )
__field( unsigned int, count )
),
TP_fast_assign(
__entry->rw = rw;
__entry->port = port;
__entry->size = size;
__entry->count = count;
),
TP_printk("pio_%s at 0x%x size %d count %d",
__entry->rw ? "write" : "read",
__entry->port, __entry->size, __entry->count)
);
/*
* Tracepoint for cpuid.
*/
TRACE_EVENT(kvm_cpuid,
TP_PROTO(unsigned int function, unsigned long rax, unsigned long rbx,
unsigned long rcx, unsigned long rdx),
TP_ARGS(function, rax, rbx, rcx, rdx),
TP_STRUCT__entry(
__field( unsigned int, function )
__field( unsigned long, rax )
__field( unsigned long, rbx )
__field( unsigned long, rcx )
__field( unsigned long, rdx )
),
TP_fast_assign(
__entry->function = function;
__entry->rax = rax;
__entry->rbx = rbx;
__entry->rcx = rcx;
__entry->rdx = rdx;
),
TP_printk("func %x rax %lx rbx %lx rcx %lx rdx %lx",
__entry->function, __entry->rax,
__entry->rbx, __entry->rcx, __entry->rdx)
);
/*
* Tracepoint for apic access.
*/
TRACE_EVENT(kvm_apic,
TP_PROTO(unsigned int rw, unsigned int reg, unsigned int val),
TP_ARGS(rw, reg, val),
TP_STRUCT__entry(
__field( unsigned int, rw )
__field( unsigned int, reg )
__field( unsigned int, val )
),
TP_fast_assign(
__entry->rw = rw;
__entry->reg = reg;
__entry->val = val;
),
TP_printk("apic_%s 0x%x = 0x%x",
__entry->rw ? "write" : "read",
__entry->reg, __entry->val)
);
#define trace_kvm_apic_read(reg, val) trace_kvm_apic(0, reg, val)
#define trace_kvm_apic_write(reg, val) trace_kvm_apic(1, reg, val)
/*
* Tracepoint for kvm guest exit:
*/
TRACE_EVENT(kvm_exit,
TP_PROTO(unsigned int exit_reason, unsigned long guest_rip),
TP_ARGS(exit_reason, guest_rip),
TP_STRUCT__entry(
__field( unsigned int, exit_reason )
__field( unsigned long, guest_rip )
),
TP_fast_assign(
__entry->exit_reason = exit_reason;
__entry->guest_rip = guest_rip;
),
TP_printk("reason %s rip 0x%lx",
ftrace_print_symbols_seq(p, __entry->exit_reason,
kvm_x86_ops->exit_reasons_str),
__entry->guest_rip)
);
/*
* Tracepoint for kvm interrupt injection:
*/
TRACE_EVENT(kvm_inj_virq,
TP_PROTO(unsigned int irq),
TP_ARGS(irq),
TP_STRUCT__entry(
__field( unsigned int, irq )
),
TP_fast_assign(
__entry->irq = irq;
),
TP_printk("irq %u", __entry->irq)
);
/*
* Tracepoint for page fault.
*/
TRACE_EVENT(kvm_page_fault,
TP_PROTO(unsigned long fault_address, unsigned int error_code),
TP_ARGS(fault_address, error_code),
TP_STRUCT__entry(
__field( unsigned long, fault_address )
__field( unsigned int, error_code )
),
TP_fast_assign(
__entry->fault_address = fault_address;
__entry->error_code = error_code;
),
TP_printk("address %lx error_code %x",
__entry->fault_address, __entry->error_code)
);
/*
* Tracepoint for guest MSR access.
*/
TRACE_EVENT(kvm_msr,
TP_PROTO(unsigned int rw, unsigned int ecx, unsigned long data),
TP_ARGS(rw, ecx, data),
TP_STRUCT__entry(
__field( unsigned int, rw )
__field( unsigned int, ecx )
__field( unsigned long, data )
),
TP_fast_assign(
__entry->rw = rw;
__entry->ecx = ecx;
__entry->data = data;
),
TP_printk("msr_%s %x = 0x%lx",
__entry->rw ? "write" : "read",
__entry->ecx, __entry->data)
);
#define trace_kvm_msr_read(ecx, data) trace_kvm_msr(0, ecx, data)
#define trace_kvm_msr_write(ecx, data) trace_kvm_msr(1, ecx, data)
/*
* Tracepoint for guest CR access.
*/
TRACE_EVENT(kvm_cr,
TP_PROTO(unsigned int rw, unsigned int cr, unsigned long val),
TP_ARGS(rw, cr, val),
TP_STRUCT__entry(
__field( unsigned int, rw )
__field( unsigned int, cr )
__field( unsigned long, val )
),
TP_fast_assign(
__entry->rw = rw;
__entry->cr = cr;
__entry->val = val;
),
TP_printk("cr_%s %x = 0x%lx",
__entry->rw ? "write" : "read",
__entry->cr, __entry->val)
);
#define trace_kvm_cr_read(cr, val) trace_kvm_cr(0, cr, val)
#define trace_kvm_cr_write(cr, val) trace_kvm_cr(1, cr, val)
#endif /* _TRACE_KVM_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

78
arch/x86/kvm/vmx.c
View File

@ -25,6 +25,7 @@
#include <linux/highmem.h>
#include <linux/sched.h>
#include <linux/moduleparam.h>
#include <linux/ftrace_event.h>
#include "kvm_cache_regs.h"
#include "x86.h"
@ -34,6 +35,8 @@
#include <asm/virtext.h>
#include <asm/mce.h>
#include "trace.h"
#define __ex(x) __kvm_handle_fault_on_reboot(x)
MODULE_AUTHOR("Qumranet");
@ -2550,7 +2553,7 @@ static void vmx_inject_irq(struct kvm_vcpu *vcpu)
uint32_t intr;
int irq = vcpu->arch.interrupt.nr;
KVMTRACE_1D(INJ_VIRQ, vcpu, (u32)irq, handler);
trace_kvm_inj_virq(irq);
++vcpu->stat.irq_injections;
if (vmx->rmode.vm86_active) {
@ -2751,8 +2754,8 @@ static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
if (enable_ept)
BUG();
cr2 = vmcs_readl(EXIT_QUALIFICATION);
KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2,
(u32)((u64)cr2 >> 32), handler);
trace_kvm_page_fault(cr2, error_code);
if (kvm_event_needs_reinjection(vcpu))
kvm_mmu_unprotect_page_virt(vcpu, cr2);
return kvm_mmu_page_fault(vcpu, cr2, error_code);
@ -2799,7 +2802,6 @@ static int handle_external_interrupt(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
++vcpu->stat.irq_exits;
KVMTRACE_1D(INTR, vcpu, vmcs_read32(VM_EXIT_INTR_INFO), handler);
return 1;
}
@ -2847,7 +2849,7 @@ vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
unsigned long exit_qualification;
unsigned long exit_qualification, val;
int cr;
int reg;
@ -2856,21 +2858,19 @@ static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
reg = (exit_qualification >> 8) & 15;
switch ((exit_qualification >> 4) & 3) {
case 0: /* mov to cr */
KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr,
(u32)kvm_register_read(vcpu, reg),
(u32)((u64)kvm_register_read(vcpu, reg) >> 32),
handler);
val = kvm_register_read(vcpu, reg);
trace_kvm_cr_write(cr, val);
switch (cr) {
case 0:
kvm_set_cr0(vcpu, kvm_register_read(vcpu, reg));
kvm_set_cr0(vcpu, val);
skip_emulated_instruction(vcpu);
return 1;
case 3:
kvm_set_cr3(vcpu, kvm_register_read(vcpu, reg));
kvm_set_cr3(vcpu, val);
skip_emulated_instruction(vcpu);
return 1;
case 4:
kvm_set_cr4(vcpu, kvm_register_read(vcpu, reg));
kvm_set_cr4(vcpu, val);
skip_emulated_instruction(vcpu);
return 1;
case 8: {
@ -2892,23 +2892,19 @@ static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
vcpu->arch.cr0 &= ~X86_CR0_TS;
vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
vmx_fpu_activate(vcpu);
KVMTRACE_0D(CLTS, vcpu, handler);
skip_emulated_instruction(vcpu);
return 1;
case 1: /*mov from cr*/
switch (cr) {
case 3:
kvm_register_write(vcpu, reg, vcpu->arch.cr3);
KVMTRACE_3D(CR_READ, vcpu, (u32)cr,
(u32)kvm_register_read(vcpu, reg),
(u32)((u64)kvm_register_read(vcpu, reg) >> 32),
handler);
trace_kvm_cr_read(cr, vcpu->arch.cr3);
skip_emulated_instruction(vcpu);
return 1;
case 8:
kvm_register_write(vcpu, reg, kvm_get_cr8(vcpu));
KVMTRACE_2D(CR_READ, vcpu, (u32)cr,
(u32)kvm_register_read(vcpu, reg), handler);
val = kvm_get_cr8(vcpu);
kvm_register_write(vcpu, reg, val);
trace_kvm_cr_read(cr, val);
skip_emulated_instruction(vcpu);
return 1;
}
@ -2976,7 +2972,6 @@ static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
val = 0;
}
kvm_register_write(vcpu, reg, val);
KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler);
} else {
val = vcpu->arch.regs[reg];
switch (dr) {
@ -3009,7 +3004,6 @@ static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
}
break;
}
KVMTRACE_2D(DR_WRITE, vcpu, (u32)dr, (u32)val, handler);
}
skip_emulated_instruction(vcpu);
return 1;
@ -3031,8 +3025,7 @@ static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
return 1;
}
KVMTRACE_3D(MSR_READ, vcpu, ecx, (u32)data, (u32)(data >> 32),
handler);
trace_kvm_msr_read(ecx, data);
/* FIXME: handling of bits 32:63 of rax, rdx */
vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
@ -3047,8 +3040,7 @@ static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
| ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
KVMTRACE_3D(MSR_WRITE, vcpu, ecx, (u32)data, (u32)(data >> 32),
handler);
trace_kvm_msr_write(ecx, data);
if (vmx_set_msr(vcpu, ecx, data) != 0) {
kvm_inject_gp(vcpu, 0);
@ -3075,7 +3067,6 @@ static int handle_interrupt_window(struct kvm_vcpu *vcpu,
cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
KVMTRACE_0D(PEND_INTR, vcpu, handler);
++vcpu->stat.irq_window_exits;
/*
@ -3227,6 +3218,7 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
}
gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
trace_kvm_page_fault(gpa, exit_qualification);
return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
}
@ -3410,8 +3402,7 @@ static int vmx_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
u32 exit_reason = vmx->exit_reason;
u32 vectoring_info = vmx->idt_vectoring_info;
KVMTRACE_3D(VMEXIT, vcpu, exit_reason, (u32)kvm_rip_read(vcpu),
(u32)((u64)kvm_rip_read(vcpu) >> 32), entryexit);
trace_kvm_exit(exit_reason, kvm_rip_read(vcpu));
/* If we need to emulate an MMIO from handle_invalid_guest_state
* we just return 0 */
@ -3500,10 +3491,8 @@ static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
/* We need to handle NMIs before interrupts are enabled */
if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
(exit_intr_info & INTR_INFO_VALID_MASK)) {
KVMTRACE_0D(NMI, &vmx->vcpu, handler);
(exit_intr_info & INTR_INFO_VALID_MASK))
asm("int $2");
}
idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
@ -3891,6 +3880,29 @@ static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
return ret;
}
static const struct trace_print_flags vmx_exit_reasons_str[] = {
{ EXIT_REASON_EXCEPTION_NMI, "exception" },
{ EXIT_REASON_EXTERNAL_INTERRUPT, "ext_irq" },
{ EXIT_REASON_TRIPLE_FAULT, "triple_fault" },
{ EXIT_REASON_NMI_WINDOW, "nmi_window" },
{ EXIT_REASON_IO_INSTRUCTION, "io_instruction" },
{ EXIT_REASON_CR_ACCESS, "cr_access" },
{ EXIT_REASON_DR_ACCESS, "dr_access" },
{ EXIT_REASON_CPUID, "cpuid" },
{ EXIT_REASON_MSR_READ, "rdmsr" },
{ EXIT_REASON_MSR_WRITE, "wrmsr" },
{ EXIT_REASON_PENDING_INTERRUPT, "interrupt_window" },
{ EXIT_REASON_HLT, "halt" },
{ EXIT_REASON_INVLPG, "invlpg" },
{ EXIT_REASON_VMCALL, "hypercall" },
{ EXIT_REASON_TPR_BELOW_THRESHOLD, "tpr_below_thres" },
{ EXIT_REASON_APIC_ACCESS, "apic_access" },
{ EXIT_REASON_WBINVD, "wbinvd" },
{ EXIT_REASON_TASK_SWITCH, "task_switch" },
{ EXIT_REASON_EPT_VIOLATION, "ept_violation" },
{ -1, NULL }
};
static struct kvm_x86_ops vmx_x86_ops = {
.cpu_has_kvm_support = cpu_has_kvm_support,
.disabled_by_bios = vmx_disabled_by_bios,
@ -3950,6 +3962,8 @@ static struct kvm_x86_ops vmx_x86_ops = {
.set_tss_addr = vmx_set_tss_addr,
.get_tdp_level = get_ept_level,
.get_mt_mask = vmx_get_mt_mask,
.exit_reasons_str = vmx_exit_reasons_str,
};
static int __init vmx_init(void)

48
arch/x86/kvm/x86.c
View File

@ -37,6 +37,8 @@
#include <linux/iommu.h>
#include <linux/intel-iommu.h>
#include <linux/cpufreq.h>
#define CREATE_TRACE_POINTS
#include "trace.h"
#include <asm/uaccess.h>
#include <asm/msr.h>
@ -347,9 +349,6 @@ EXPORT_SYMBOL_GPL(kvm_set_cr0);
void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
{
kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f));
KVMTRACE_1D(LMSW, vcpu,
(u32)((vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)),
handler);
}
EXPORT_SYMBOL_GPL(kvm_lmsw);
@ -2568,7 +2567,6 @@ int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
int emulate_clts(struct kvm_vcpu *vcpu)
{
KVMTRACE_0D(CLTS, vcpu, handler);
kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS);
return X86EMUL_CONTINUE;
}
@ -2851,12 +2849,8 @@ int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
vcpu->arch.pio.down = 0;
vcpu->arch.pio.rep = 0;
if (vcpu->run->io.direction == KVM_EXIT_IO_IN)
KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size,
handler);
else
KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size,
handler);
trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port,
size, 1);
val = kvm_register_read(vcpu, VCPU_REGS_RAX);
memcpy(vcpu->arch.pio_data, &val, 4);
@ -2892,12 +2886,8 @@ int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
vcpu->arch.pio.down = down;
vcpu->arch.pio.rep = rep;
if (vcpu->run->io.direction == KVM_EXIT_IO_IN)
KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size,
handler);
else
KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size,
handler);
trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port,
size, count);
if (!count) {
kvm_x86_ops->skip_emulated_instruction(vcpu);
@ -3075,7 +3065,6 @@ void kvm_arch_exit(void)
int kvm_emulate_halt(struct kvm_vcpu *vcpu)
{
++vcpu->stat.halt_exits;
KVMTRACE_0D(HLT, vcpu, handler);
if (irqchip_in_kernel(vcpu->kvm)) {
vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
return 1;
@ -3106,7 +3095,7 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
KVMTRACE_1D(VMMCALL, vcpu, (u32)nr, handler);
trace_kvm_hypercall(nr, a0, a1, a2, a3);
if (!is_long_mode(vcpu)) {
nr &= 0xFFFFFFFF;
@ -3206,8 +3195,6 @@ unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
return 0;
}
KVMTRACE_3D(CR_READ, vcpu, (u32)cr, (u32)value,
(u32)((u64)value >> 32), handler);
return value;
}
@ -3215,9 +3202,6 @@ unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
unsigned long *rflags)
{
KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)val,
(u32)((u64)val >> 32), handler);
switch (cr) {
case 0:
kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val));
@ -3327,11 +3311,11 @@ void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx);
}
kvm_x86_ops->skip_emulated_instruction(vcpu);
KVMTRACE_5D(CPUID, vcpu, function,
(u32)kvm_register_read(vcpu, VCPU_REGS_RAX),
(u32)kvm_register_read(vcpu, VCPU_REGS_RBX),
(u32)kvm_register_read(vcpu, VCPU_REGS_RCX),
(u32)kvm_register_read(vcpu, VCPU_REGS_RDX), handler);
trace_kvm_cpuid(function,
kvm_register_read(vcpu, VCPU_REGS_RAX),
kvm_register_read(vcpu, VCPU_REGS_RBX),
kvm_register_read(vcpu, VCPU_REGS_RCX),
kvm_register_read(vcpu, VCPU_REGS_RDX));
}
EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
@ -3527,7 +3511,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
set_debugreg(vcpu->arch.eff_db[3], 3);
}
KVMTRACE_0D(VMENTRY, vcpu, entryexit);
trace_kvm_entry(vcpu->vcpu_id);
kvm_x86_ops->run(vcpu, kvm_run);
if (unlikely(vcpu->arch.switch_db_regs)) {
@ -4842,3 +4826,9 @@ int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
{
return kvm_x86_ops->interrupt_allowed(vcpu);
}
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);

57
include/trace/events/kvm.h Normal file
View File

@ -0,0 +1,57 @@
#if !defined(_TRACE_KVM_MAIN_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_KVM_MAIN_H
#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM kvm
#define TRACE_INCLUDE_FILE kvm
#if defined(__KVM_HAVE_IOAPIC)
TRACE_EVENT(kvm_set_irq,
TP_PROTO(unsigned int gsi),
TP_ARGS(gsi),
TP_STRUCT__entry(
__field( unsigned int, gsi )
),
TP_fast_assign(
__entry->gsi = gsi;
),
TP_printk("gsi %u", __entry->gsi)
);
#define kvm_irqchips \
{KVM_IRQCHIP_PIC_MASTER, "PIC master"}, \
{KVM_IRQCHIP_PIC_SLAVE, "PIC slave"}, \
{KVM_IRQCHIP_IOAPIC, "IOAPIC"}
TRACE_EVENT(kvm_ack_irq,
TP_PROTO(unsigned int irqchip, unsigned int pin),
TP_ARGS(irqchip, pin),
TP_STRUCT__entry(
__field( unsigned int, irqchip )
__field( unsigned int, pin )
),
TP_fast_assign(
__entry->irqchip = irqchip;
__entry->pin = pin;
),
TP_printk("irqchip %s pin %u",
__print_symbolic(__entry->irqchip, kvm_irqchips),
__entry->pin)
);
#endif /* defined(__KVM_HAVE_IOAPIC) */
#endif /* _TRACE_KVM_MAIN_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

5
virt/kvm/irq_comm.c
View File

@ -20,6 +20,7 @@
*/
#include <linux/kvm_host.h>
#include <trace/events/kvm.h>
#include <asm/msidef.h>
#ifdef CONFIG_IA64
@ -125,6 +126,8 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
unsigned long *irq_state, sig_level;
int ret = -1;
trace_kvm_set_irq(irq);
WARN_ON(!mutex_is_locked(&kvm->irq_lock));
if (irq < KVM_IOAPIC_NUM_PINS) {
@ -161,6 +164,8 @@ void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
struct hlist_node *n;
unsigned gsi = pin;
trace_kvm_ack_irq(irqchip, pin);
list_for_each_entry(e, &kvm->irq_routing, link)
if (e->type == KVM_IRQ_ROUTING_IRQCHIP &&
e->irqchip.irqchip == irqchip &&

4
virt/kvm/kvm_main.c
View File

@ -59,6 +59,9 @@
#include "irq.h"
#endif
#define CREATE_TRACE_POINTS
#include <trace/events/kvm.h>
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");
@ -2718,6 +2721,7 @@ EXPORT_SYMBOL_GPL(kvm_init);
void kvm_exit(void)
{
kvm_trace_cleanup();
tracepoint_synchronize_unregister();
misc_deregister(&kvm_dev);
kmem_cache_destroy(kvm_vcpu_cache);
sysdev_unregister(&kvm_sysdev);