This patch adds a function to dump the vmcb into the kernel
log and calls it after a failed vmrun to ease debugging.
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
arch/x86/kvm/svm.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 95 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 889f660..0201b06 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2637,6 +2637,99 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
[SVM_EXIT_NPF] = pf_interception,
};
+void dump_vmcb(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb_control_area *control = &svm->vmcb->control;
+ struct vmcb_save_area *save = &svm->vmcb->save;
+
+ pr_err("VMCB Control Area:\n");
+ pr_err("cr_read: %04x\n", control->intercept_cr_read);
+ pr_err("cr_write: %04x\n", control->intercept_cr_write);
+ pr_err("dr_read: %04x\n", control->intercept_dr_read);
+ pr_err("dr_write: %04x\n", control->intercept_dr_write);
+ pr_err("exceptions: %08x\n", control->intercept_exceptions);
+ pr_err("intercepts: %016llx\n", control->intercept);
+ pr_err("pause filter count: %d\n", control->pause_filter_count);
+ pr_err("iopm_base_pa: %016llx\n", control->iopm_base_pa);
+ pr_err("msrpm_base_pa: %016llx\n", control->msrpm_base_pa);
+ pr_err("tsc_offset: %016llx\n", control->tsc_offset);
+ pr_err("asid: %d\n", control->asid);
+ pr_err("tlb_ctl: %d\n", control->tlb_ctl);
+ pr_err("int_ctl: %08x\n", control->int_ctl);
+ pr_err("int_vector: %08x\n", control->int_vector);
+ pr_err("int_state: %08x\n", control->int_state);
+ pr_err("exit_code: %08x\n", control->exit_code);
+ pr_err("exit_info1: %016llx\n", control->exit_info_1);
+ pr_err("exit_info2: %016llx\n", control->exit_info_2);
+ pr_err("exit_int_info: %08x\n", control->exit_int_info);
+ pr_err("exit_int_info_err: %08x\n", control->exit_int_info_err);
+ pr_err("nested_ctl: %lld\n", control->nested_ctl);
+ pr_err("nested_cr3: %016llx\n", control->nested_cr3);
+ pr_err("event_inj: %08x\n", control->event_inj);
+ pr_err("event_inj_err: %08x\n", control->event_inj_err);
+ pr_err("lbr_ctl: %lld\n", control->lbr_ctl);
+ pr_err("next_rip: %016llx\n", control->next_rip);
+ pr_err("VMCB State Save Area:\n");
+ pr_err("es: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->es.selector, save->es.attrib,
+ save->es.limit, save->es.base);
+ pr_err("cs: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->cs.selector, save->cs.attrib,
+ save->cs.limit, save->cs.base);
+ pr_err("ss: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->ss.selector, save->ss.attrib,
+ save->ss.limit, save->ss.base);
+ pr_err("ds: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->ds.selector, save->ds.attrib,
+ save->ds.limit, save->ds.base);
+ pr_err("fs: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->fs.selector, save->fs.attrib,
+ save->fs.limit, save->fs.base);
+ pr_err("gs: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->gs.selector, save->gs.attrib,
+ save->gs.limit, save->gs.base);
+ pr_err("gdtr: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->gdtr.selector, save->gdtr.attrib,
+ save->gdtr.limit, save->gdtr.base);
+ pr_err("ldtr: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->ldtr.selector, save->ldtr.attrib,
+ save->ldtr.limit, save->ldtr.base);
+ pr_err("idtr: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->idtr.selector, save->idtr.attrib,
+ save->idtr.limit, save->idtr.base);
+ pr_err("tr: s: %04x a: %04x l: %08x b: %016llx\n",
+ save->tr.selector, save->tr.attrib,
+ save->tr.limit, save->tr.base);
+ pr_err("cpl: %d efer: %016llx\n",
+ save->cpl, save->efer);
+ pr_err("cr0: %016llx cr2: %016llx\n",
+ save->cr0, save->cr2);
+ pr_err("cr3: %016llx cr4: %016llx\n",
+ save->cr3, save->cr4);
+ pr_err("dr6: %016llx dr7: %016llx\n",
+ save->dr6, save->dr7);
+ pr_err("rip: %016llx rflags: %016llx\n",
+ save->rip, save->rflags);
+ pr_err("rsp: %016llx rax: %016llx\n",
+ save->rsp, save->rax);
+ pr_err("star: %016llx lstar: %016llx\n",
+ save->star, save->lstar);
+ pr_err("cstar: %016llx sfmask: %016llx\n",
+ save->cstar, save->sfmask);
+ pr_err("kernel_gs_base: %016llx sysenter_cs: %016llx\n",
+ save->kernel_gs_base, save->sysenter_cs);
+ pr_err("sysenter_esp: %016llx sysenter_eip: %016llx\n",
+ save->sysenter_esp, save->sysenter_eip);
+ pr_err("gpat: %016llx dbgctl: %016llx\n",
+ save->g_pat, save->dbgctl);
+ pr_err("br_from: %016llx br_to: %016llx\n",
+ save->br_from, save->br_to);
+ pr_err("excp_from: %016llx excp_to: %016llx\n",
+ save->last_excp_from, save->last_excp_to);
+
+}
+
static int handle_exit(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
@@ -2681,6 +2774,8 @@ static int handle_exit(struct kvm_vcpu *vcpu)
kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
kvm_run->fail_entry.hardware_entry_failure_reason
= svm->vmcb->control.exit_code;
+ pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
+ dump_vmcb(vcpu);
return 0;
}
--
1.7.1
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