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KVM: x86: Print CPU of last attempted VM-entry when dumping VMCS/VMCB

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Failed VM-entry is often due to a faulty core. To help identify bad
cores, print the id of the last logical processor that attempted
VM-entry whenever dumping a VMCS or VMCB.

Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20210621221648.1833148-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jim Mattson 2021-06-21 15:16:48 -07:00 committed by Paolo Bonzini
parent c3ab0e28a4
commit 18f63b15b0
2 changed files with 4 additions and 0 deletions
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2
arch/x86/kvm/svm/svm.c
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@ -3132,6 +3132,8 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
return;
}
pr_err("VMCB %p, last attempted VMRUN on CPU %d\n",
svm->current_vmcb->ptr, vcpu->arch.last_vmentry_cpu);
pr_err("VMCB Control Area:\n");
pr_err("%-20s%04x\n", "cr_read:", control->intercepts[INTERCEPT_CR] & 0xffff);
pr_err("%-20s%04x\n", "cr_write:", control->intercepts[INTERCEPT_CR] >> 16);

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

@ -5724,6 +5724,8 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
if (cpu_has_secondary_exec_ctrls())
secondary_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
pr_err("VMCS %p, last attempted VM-entry on CPU %d\n",
vmx->loaded_vmcs->vmcs, vcpu->arch.last_vmentry_cpu);
pr_err("*** Guest State ***\n");
pr_err("CR0: actual=0x%016lx, shadow=0x%016lx, gh_mask=%016lx\n",
vmcs_readl(GUEST_CR0), vmcs_readl(CR0_READ_SHADOW),