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KVM: x86: Print guest pgd in kvm_nested_vmenter()

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Print guest pgd in kvm_nested_vmenter() to enrich the information for
tracing. When tdp is enabled, print the value of tdp page table (EPT/NPT);
when tdp is disabled, print the value of non-nested CR3.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20220825225755.907001-4-mizhang@google.com
[sean: print nested_cr3 vs. nested_eptp vs. guest_cr3]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Mingwei Zhang 2022-08-25 22:57:55 +00:00 committed by Paolo Bonzini
parent 37ef0be269
commit 02dfc44f20
3 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kvm/svm/nested.c
View File

@ -787,6 +787,8 @@ int enter_svm_guest_mode(struct kvm_vcpu *vcpu, u64 vmcb12_gpa,
vmcb12->control.int_ctl,
vmcb12->control.event_inj,
vmcb12->control.nested_ctl,
vmcb12->control.nested_cr3,
vmcb12->save.cr3,
KVM_ISA_SVM);
trace_kvm_nested_intercepts(vmcb12->control.intercepts[INTERCEPT_CR] & 0xffff,

15
arch/x86/kvm/trace.h
View File

@ -596,8 +596,10 @@ TRACE_EVENT(kvm_pv_eoi,
*/
TRACE_EVENT(kvm_nested_vmenter,
TP_PROTO(__u64 rip, __u64 vmcb, __u64 nested_rip, __u32 int_ctl,
__u32 event_inj, bool tdp_enabled, __u32 isa),
TP_ARGS(rip, vmcb, nested_rip, int_ctl, event_inj, tdp_enabled, isa),
__u32 event_inj, bool tdp_enabled, __u64 guest_tdp_pgd,
__u64 guest_cr3, __u32 isa),
TP_ARGS(rip, vmcb, nested_rip, int_ctl, event_inj, tdp_enabled,
guest_tdp_pgd, guest_cr3, isa),
TP_STRUCT__entry(
__field( __u64, rip )
@ -606,6 +608,7 @@ TRACE_EVENT(kvm_nested_vmenter,
__field( __u32, int_ctl )
__field( __u32, event_inj )
__field( bool, tdp_enabled )
__field( __u64, guest_pgd )
__field( __u32, isa )
),
@ -616,11 +619,12 @@ TRACE_EVENT(kvm_nested_vmenter,
__entry->int_ctl = int_ctl;
__entry->event_inj = event_inj;
__entry->tdp_enabled = tdp_enabled;
__entry->guest_pgd = tdp_enabled ? guest_tdp_pgd : guest_cr3;
__entry->isa = isa;
),
TP_printk("rip: 0x%016llx %s: 0x%016llx nested_rip: 0x%016llx "
"int_ctl: 0x%08x event_inj: 0x%08x nested_%s: %s",
"int_ctl: 0x%08x event_inj: 0x%08x nested_%s=%s %s: 0x%016llx",
__entry->rip,
__entry->isa == KVM_ISA_VMX ? "vmcs" : "vmcb",
__entry->vmcb,
@ -628,7 +632,10 @@ TRACE_EVENT(kvm_nested_vmenter,
__entry->int_ctl,
__entry->event_inj,
__entry->isa == KVM_ISA_VMX ? "ept" : "npt",
__entry->tdp_enabled ? "on" : "off")
__entry->tdp_enabled ? "y" : "n",
!__entry->tdp_enabled ? "guest_cr3" :
__entry->isa == KVM_ISA_VMX ? "nested_eptp" : "nested_cr3",
__entry->guest_pgd)
);
TRACE_EVENT(kvm_nested_intercepts,

2
arch/x86/kvm/vmx/nested.c
View File

@ -3370,6 +3370,8 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
vmcs12->guest_intr_status,
vmcs12->vm_entry_intr_info_field,
vmcs12->secondary_vm_exec_control & SECONDARY_EXEC_ENABLE_EPT,
vmcs12->ept_pointer,
vmcs12->guest_cr3,
KVM_ISA_VMX);
kvm_service_local_tlb_flush_requests(vcpu);