KVM: x86: dump_vmcs should include the autoload/autostore MSR lists

When dumping the current VMCS state, include the MSRs that are being
automatically loaded/stored during VM entry/exit.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210318120841.133123-6-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 63c3e01..c05e6e2 100644 (file)
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5721,6 +5721,16 @@ static void vmx_dump_dtsel(char *name, uint32_t limit)
               vmcs_readl(limit + GUEST_GDTR_BASE - GUEST_GDTR_LIMIT));
 }
 
+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);
@@ -5802,6 +5812,10 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
        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",
@@ -5831,6 +5845,8 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
            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",