When dumping the current VMCS state, include the MSRs that are being
automatically loaded/stored during VM entry/exit.
Signed-off-by: David Edmondson <[email protected]>
---
arch/x86/kvm/vmx/vmx.c | 25 +++++++++++++++++++++----
arch/x86/kvm/vmx/vmx.h | 2 +-
2 files changed, 22 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index ed04827a3593..de42b8c14a38 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5810,8 +5810,19 @@ static void vmx_dump_dtsel(char *name, uint32_t limit)
vmcs_readl(limit + GUEST_GDTR_BASE - GUEST_GDTR_LIMIT));
}
-void dump_vmcs(void)
+static void vmx_dump_msrs(char *name, struct vmx_msrs *m)
{
+ unsigned int i;
+ struct vmx_msr_entry *e;
+
+ pr_err("MSR %s:\n", name);
+ for (i = 0, e = m->val; i < m->nr; ++i, ++e)
+ pr_err(" %2d: msr=0x%08x value=0x%016llx\n", i, e->index, e->value);
+}
+
+void dump_vmcs(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
u32 vmentry_ctl, vmexit_ctl;
u32 cpu_based_exec_ctrl, pin_based_exec_ctrl, secondary_exec_control;
unsigned long cr4;
@@ -5890,6 +5901,10 @@ void dump_vmcs(void)
if (secondary_exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY)
pr_err("InterruptStatus = %04x\n",
vmcs_read16(GUEST_INTR_STATUS));
+ if (vmcs_read32(VM_ENTRY_MSR_LOAD_COUNT) > 0)
+ vmx_dump_msrs("guest autoload", &vmx->msr_autoload.guest);
+ if (vmcs_read32(VM_EXIT_MSR_STORE_COUNT) > 0)
+ vmx_dump_msrs("guest autostore", &vmx->msr_autostore.guest);
pr_err("*** Host State ***\n");
pr_err("RIP = 0x%016lx RSP = 0x%016lx\n",
@@ -5919,6 +5934,8 @@ void dump_vmcs(void)
vmexit_ctl & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
pr_err("PerfGlobCtl = 0x%016llx\n",
vmcs_read64(HOST_IA32_PERF_GLOBAL_CTRL));
+ if (vmcs_read32(VM_EXIT_MSR_LOAD_COUNT) > 0)
+ vmx_dump_msrs("host autoload", &vmx->msr_autoload.host);
pr_err("*** Control State ***\n");
pr_err("PinBased=%08x CPUBased=%08x SecondaryExec=%08x\n",
@@ -6019,7 +6036,7 @@ static int __vmx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
}
if (exit_reason.failed_vmentry) {
- dump_vmcs();
+ dump_vmcs(vcpu);
vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
vcpu->run->fail_entry.hardware_entry_failure_reason
= exit_reason.full;
@@ -6028,7 +6045,7 @@ static int __vmx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
}
if (unlikely(vmx->fail)) {
- dump_vmcs();
+ dump_vmcs(vcpu);
vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
vcpu->run->fail_entry.hardware_entry_failure_reason
= vmcs_read32(VM_INSTRUCTION_ERROR);
@@ -6114,7 +6131,7 @@ static int __vmx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
unexpected_vmexit:
vcpu_unimpl(vcpu, "vmx: unexpected exit reason 0x%x\n",
exit_reason.full);
- dump_vmcs();
+ dump_vmcs(vcpu);
vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
vcpu->run->internal.suberror =
KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON;
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 12c53d05a902..4d4a24e00012 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -541,6 +541,6 @@ static inline bool vmx_guest_state_valid(struct kvm_vcpu *vcpu)
return is_unrestricted_guest(vcpu) || __vmx_guest_state_valid(vcpu);
}
-void dump_vmcs(void);
+void dump_vmcs(struct kvm_vcpu *vcpu);
#endif /* __KVM_X86_VMX_H */
--
2.30.0