KVM: Use __print_symbolic() for vmexit tracepoints
The vmexit tracepoints format the exit_reason to make it human-readable. Since the exit_reason depends on the instruction set (vmx or svm), formatting is handled with ftrace_print_symbols_seq() by referring to the appropriate exit reason table. However, the ftrace_print_symbols_seq() function is not meant to be used directly in tracepoints since it does not export the formatting table which userspace tools like trace-cmd and perf use to format traces. In practice perf dies when formatting vmexit-related events and trace-cmd falls back to printing the numeric value (with extra formatting code in the kvm plugin to paper over this limitation). Other userspace consumers of vmexit-related tracepoints would be in similar trouble. To avoid significant changes to the kvm_exit tracepoint, this patch moves the vmx and svm exit reason tables into arch/x86/kvm/trace.h and selects the right table with __print_symbolic() depending on the instruction set. Note that __print_symbolic() is designed for exporting the formatting table to userspace and allows trace-cmd and perf to work. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Stefan Hajnoczi
Avi Kivity
Родитель
e097e5ffd6
Коммит
0d460ffc09
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@ -635,8 +635,6 @@ struct kvm_x86_ops {
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int (*check_intercept)(struct kvm_vcpu *vcpu,
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struct x86_instruction_info *info,
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enum x86_intercept_stage stage);
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const struct trace_print_flags *exit_reasons_str;
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};
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struct kvm_arch_async_pf {
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@ -3899,60 +3899,6 @@ static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
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}
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}
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static const struct trace_print_flags svm_exit_reasons_str[] = {
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{ SVM_EXIT_READ_CR0, "read_cr0" },
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{ SVM_EXIT_READ_CR3, "read_cr3" },
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{ SVM_EXIT_READ_CR4, "read_cr4" },
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{ SVM_EXIT_READ_CR8, "read_cr8" },
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{ SVM_EXIT_WRITE_CR0, "write_cr0" },
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{ SVM_EXIT_WRITE_CR3, "write_cr3" },
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{ SVM_EXIT_WRITE_CR4, "write_cr4" },
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{ SVM_EXIT_WRITE_CR8, "write_cr8" },
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{ SVM_EXIT_READ_DR0, "read_dr0" },
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{ SVM_EXIT_READ_DR1, "read_dr1" },
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{ SVM_EXIT_READ_DR2, "read_dr2" },
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{ SVM_EXIT_READ_DR3, "read_dr3" },
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{ SVM_EXIT_WRITE_DR0, "write_dr0" },
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{ SVM_EXIT_WRITE_DR1, "write_dr1" },
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{ SVM_EXIT_WRITE_DR2, "write_dr2" },
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{ SVM_EXIT_WRITE_DR3, "write_dr3" },
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{ SVM_EXIT_WRITE_DR5, "write_dr5" },
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{ SVM_EXIT_WRITE_DR7, "write_dr7" },
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{ SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" },
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{ SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" },
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{ SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" },
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{ SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" },
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{ SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" },
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{ SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" },
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{ SVM_EXIT_INTR, "interrupt" },
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{ SVM_EXIT_NMI, "nmi" },
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{ SVM_EXIT_SMI, "smi" },
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{ SVM_EXIT_INIT, "init" },
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{ SVM_EXIT_VINTR, "vintr" },
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{ SVM_EXIT_CPUID, "cpuid" },
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{ SVM_EXIT_INVD, "invd" },
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{ SVM_EXIT_HLT, "hlt" },
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{ SVM_EXIT_INVLPG, "invlpg" },
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{ SVM_EXIT_INVLPGA, "invlpga" },
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{ SVM_EXIT_IOIO, "io" },
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{ SVM_EXIT_MSR, "msr" },
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{ SVM_EXIT_TASK_SWITCH, "task_switch" },
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{ SVM_EXIT_SHUTDOWN, "shutdown" },
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{ SVM_EXIT_VMRUN, "vmrun" },
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{ SVM_EXIT_VMMCALL, "hypercall" },
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{ SVM_EXIT_VMLOAD, "vmload" },
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{ SVM_EXIT_VMSAVE, "vmsave" },
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{ SVM_EXIT_STGI, "stgi" },
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{ SVM_EXIT_CLGI, "clgi" },
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{ SVM_EXIT_SKINIT, "skinit" },
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{ SVM_EXIT_WBINVD, "wbinvd" },
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{ SVM_EXIT_MONITOR, "monitor" },
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{ SVM_EXIT_MWAIT, "mwait" },
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{ SVM_EXIT_XSETBV, "xsetbv" },
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{ SVM_EXIT_NPF, "npf" },
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{ -1, NULL }
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};
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static int svm_get_lpage_level(void)
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{
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return PT_PDPE_LEVEL;
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@ -4225,7 +4171,6 @@ static struct kvm_x86_ops svm_x86_ops = {
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.get_mt_mask = svm_get_mt_mask,
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.get_exit_info = svm_get_exit_info,
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.exit_reasons_str = svm_exit_reasons_str,
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.get_lpage_level = svm_get_lpage_level,
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@ -2,6 +2,8 @@
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#define _TRACE_KVM_H
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#include <linux/tracepoint.h>
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#include <asm/vmx.h>
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#include <asm/svm.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM kvm
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@ -181,6 +183,95 @@ TRACE_EVENT(kvm_apic,
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#define KVM_ISA_VMX 1
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#define KVM_ISA_SVM 2
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#define VMX_EXIT_REASONS \
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{ EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
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{ EXIT_REASON_EXTERNAL_INTERRUPT, "EXTERNAL_INTERRUPT" }, \
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{ EXIT_REASON_TRIPLE_FAULT, "TRIPLE_FAULT" }, \
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{ EXIT_REASON_PENDING_INTERRUPT, "PENDING_INTERRUPT" }, \
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{ EXIT_REASON_NMI_WINDOW, "NMI_WINDOW" }, \
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{ EXIT_REASON_TASK_SWITCH, "TASK_SWITCH" }, \
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{ EXIT_REASON_CPUID, "CPUID" }, \
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{ EXIT_REASON_HLT, "HLT" }, \
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{ EXIT_REASON_INVLPG, "INVLPG" }, \
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{ EXIT_REASON_RDPMC, "RDPMC" }, \
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{ EXIT_REASON_RDTSC, "RDTSC" }, \
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{ EXIT_REASON_VMCALL, "VMCALL" }, \
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{ EXIT_REASON_VMCLEAR, "VMCLEAR" }, \
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{ EXIT_REASON_VMLAUNCH, "VMLAUNCH" }, \
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{ EXIT_REASON_VMPTRLD, "VMPTRLD" }, \
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{ EXIT_REASON_VMPTRST, "VMPTRST" }, \
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{ EXIT_REASON_VMREAD, "VMREAD" }, \
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{ EXIT_REASON_VMRESUME, "VMRESUME" }, \
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{ EXIT_REASON_VMWRITE, "VMWRITE" }, \
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{ EXIT_REASON_VMOFF, "VMOFF" }, \
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{ EXIT_REASON_VMON, "VMON" }, \
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{ EXIT_REASON_CR_ACCESS, "CR_ACCESS" }, \
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{ EXIT_REASON_DR_ACCESS, "DR_ACCESS" }, \
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{ EXIT_REASON_IO_INSTRUCTION, "IO_INSTRUCTION" }, \
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{ EXIT_REASON_MSR_READ, "MSR_READ" }, \
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{ EXIT_REASON_MSR_WRITE, "MSR_WRITE" }, \
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{ EXIT_REASON_MWAIT_INSTRUCTION, "MWAIT_INSTRUCTION" }, \
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{ EXIT_REASON_MONITOR_INSTRUCTION, "MONITOR_INSTRUCTION" }, \
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{ EXIT_REASON_PAUSE_INSTRUCTION, "PAUSE_INSTRUCTION" }, \
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{ EXIT_REASON_MCE_DURING_VMENTRY, "MCE_DURING_VMENTRY" }, \
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{ EXIT_REASON_TPR_BELOW_THRESHOLD, "TPR_BELOW_THRESHOLD" }, \
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{ EXIT_REASON_APIC_ACCESS, "APIC_ACCESS" }, \
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{ EXIT_REASON_EPT_VIOLATION, "EPT_VIOLATION" }, \
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{ EXIT_REASON_EPT_MISCONFIG, "EPT_MISCONFIG" }, \
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{ EXIT_REASON_WBINVD, "WBINVD" }
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#define SVM_EXIT_REASONS \
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{ SVM_EXIT_READ_CR0, "read_cr0" }, \
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{ SVM_EXIT_READ_CR3, "read_cr3" }, \
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{ SVM_EXIT_READ_CR4, "read_cr4" }, \
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{ SVM_EXIT_READ_CR8, "read_cr8" }, \
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{ SVM_EXIT_WRITE_CR0, "write_cr0" }, \
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{ SVM_EXIT_WRITE_CR3, "write_cr3" }, \
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{ SVM_EXIT_WRITE_CR4, "write_cr4" }, \
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{ SVM_EXIT_WRITE_CR8, "write_cr8" }, \
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{ SVM_EXIT_READ_DR0, "read_dr0" }, \
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{ SVM_EXIT_READ_DR1, "read_dr1" }, \
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{ SVM_EXIT_READ_DR2, "read_dr2" }, \
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{ SVM_EXIT_READ_DR3, "read_dr3" }, \
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{ SVM_EXIT_WRITE_DR0, "write_dr0" }, \
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{ SVM_EXIT_WRITE_DR1, "write_dr1" }, \
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{ SVM_EXIT_WRITE_DR2, "write_dr2" }, \
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{ SVM_EXIT_WRITE_DR3, "write_dr3" }, \
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{ SVM_EXIT_WRITE_DR5, "write_dr5" }, \
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{ SVM_EXIT_WRITE_DR7, "write_dr7" }, \
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{ SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, \
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{ SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, \
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{ SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, \
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{ SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, \
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{ SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, \
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{ SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, \
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{ SVM_EXIT_INTR, "interrupt" }, \
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{ SVM_EXIT_NMI, "nmi" }, \
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{ SVM_EXIT_SMI, "smi" }, \
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{ SVM_EXIT_INIT, "init" }, \
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{ SVM_EXIT_VINTR, "vintr" }, \
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{ SVM_EXIT_CPUID, "cpuid" }, \
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{ SVM_EXIT_INVD, "invd" }, \
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{ SVM_EXIT_HLT, "hlt" }, \
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{ SVM_EXIT_INVLPG, "invlpg" }, \
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{ SVM_EXIT_INVLPGA, "invlpga" }, \
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{ SVM_EXIT_IOIO, "io" }, \
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{ SVM_EXIT_MSR, "msr" }, \
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{ SVM_EXIT_TASK_SWITCH, "task_switch" }, \
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{ SVM_EXIT_SHUTDOWN, "shutdown" }, \
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{ SVM_EXIT_VMRUN, "vmrun" }, \
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{ SVM_EXIT_VMMCALL, "hypercall" }, \
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{ SVM_EXIT_VMLOAD, "vmload" }, \
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{ SVM_EXIT_VMSAVE, "vmsave" }, \
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{ SVM_EXIT_STGI, "stgi" }, \
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{ SVM_EXIT_CLGI, "clgi" }, \
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{ SVM_EXIT_SKINIT, "skinit" }, \
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{ SVM_EXIT_WBINVD, "wbinvd" }, \
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{ SVM_EXIT_MONITOR, "monitor" }, \
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{ SVM_EXIT_MWAIT, "mwait" }, \
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{ SVM_EXIT_XSETBV, "xsetbv" }, \
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{ SVM_EXIT_NPF, "npf" }
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/*
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* Tracepoint for kvm guest exit:
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*/
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@ -205,8 +296,9 @@ TRACE_EVENT(kvm_exit,
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),
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TP_printk("reason %s rip 0x%lx info %llx %llx",
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ftrace_print_symbols_seq(p, __entry->exit_reason,
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kvm_x86_ops->exit_reasons_str),
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(__entry->isa == KVM_ISA_VMX) ?
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__print_symbolic(__entry->exit_reason, VMX_EXIT_REASONS) :
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__print_symbolic(__entry->exit_reason, SVM_EXIT_REASONS),
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__entry->guest_rip, __entry->info1, __entry->info2)
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);
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@ -512,8 +604,9 @@ TRACE_EVENT(kvm_nested_vmexit,
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TP_printk("rip: 0x%016llx reason: %s ext_inf1: 0x%016llx "
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"ext_inf2: 0x%016llx ext_int: 0x%08x ext_int_err: 0x%08x",
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__entry->rip,
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ftrace_print_symbols_seq(p, __entry->exit_code,
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kvm_x86_ops->exit_reasons_str),
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(__entry->isa == KVM_ISA_VMX) ?
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__print_symbolic(__entry->exit_code, VMX_EXIT_REASONS) :
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__print_symbolic(__entry->exit_code, SVM_EXIT_REASONS),
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__entry->exit_info1, __entry->exit_info2,
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__entry->exit_int_info, __entry->exit_int_info_err)
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);
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@ -548,8 +641,9 @@ TRACE_EVENT(kvm_nested_vmexit_inject,
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TP_printk("reason: %s ext_inf1: 0x%016llx "
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"ext_inf2: 0x%016llx ext_int: 0x%08x ext_int_err: 0x%08x",
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ftrace_print_symbols_seq(p, __entry->exit_code,
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kvm_x86_ops->exit_reasons_str),
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(__entry->isa == KVM_ISA_VMX) ?
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__print_symbolic(__entry->exit_code, VMX_EXIT_REASONS) :
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__print_symbolic(__entry->exit_code, SVM_EXIT_REASONS),
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__entry->exit_info1, __entry->exit_info2,
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__entry->exit_int_info, __entry->exit_int_info_err)
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);
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@ -6241,49 +6241,6 @@ static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
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return ret;
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}
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#define _ER(x) { EXIT_REASON_##x, #x }
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static const struct trace_print_flags vmx_exit_reasons_str[] = {
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_ER(EXCEPTION_NMI),
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_ER(EXTERNAL_INTERRUPT),
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_ER(TRIPLE_FAULT),
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_ER(PENDING_INTERRUPT),
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_ER(NMI_WINDOW),
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_ER(TASK_SWITCH),
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_ER(CPUID),
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_ER(HLT),
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_ER(INVLPG),
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_ER(RDPMC),
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_ER(RDTSC),
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_ER(VMCALL),
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_ER(VMCLEAR),
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_ER(VMLAUNCH),
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_ER(VMPTRLD),
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_ER(VMPTRST),
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_ER(VMREAD),
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_ER(VMRESUME),
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_ER(VMWRITE),
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_ER(VMOFF),
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_ER(VMON),
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_ER(CR_ACCESS),
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_ER(DR_ACCESS),
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_ER(IO_INSTRUCTION),
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_ER(MSR_READ),
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_ER(MSR_WRITE),
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_ER(MWAIT_INSTRUCTION),
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_ER(MONITOR_INSTRUCTION),
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_ER(PAUSE_INSTRUCTION),
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_ER(MCE_DURING_VMENTRY),
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_ER(TPR_BELOW_THRESHOLD),
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_ER(APIC_ACCESS),
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_ER(EPT_VIOLATION),
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_ER(EPT_MISCONFIG),
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_ER(WBINVD),
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{ -1, NULL }
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};
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#undef _ER
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static int vmx_get_lpage_level(void)
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{
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if (enable_ept && !cpu_has_vmx_ept_1g_page())
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@ -7039,7 +6996,6 @@ static struct kvm_x86_ops vmx_x86_ops = {
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.get_mt_mask = vmx_get_mt_mask,
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.get_exit_info = vmx_get_exit_info,
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.exit_reasons_str = vmx_exit_reasons_str,
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.get_lpage_level = vmx_get_lpage_level,
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