If the VM entry/exit controls for loading/saving MSR_EFER are either
not available (an older processor or explicitly disabled) or not
used (host and guest values are the same), reading GUEST_IA32_EFER
from the VMCS returns an inaccurate value.
Because of this, in dump_vmcs() don't use GUEST_IA32_EFER to decide
whether to print the PDPTRs - do so if the EPT is in use and CR4.PAE
is set.
Fixes: 4eb64dce8d0a ("KVM: x86: dump VMCS on invalid entry")
Signed-off-by: David Edmondson <david.edmondson@xxxxxxxxxx>
---
arch/x86/kvm/vmx/vmx.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index eb69fef57485..818051c9fa10 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5759,7 +5759,6 @@ void dump_vmcs(void)
u32 vmentry_ctl, vmexit_ctl;
u32 cpu_based_exec_ctrl, pin_based_exec_ctrl, secondary_exec_control;
unsigned long cr4;
- u64 efer;
if (!dump_invalid_vmcs) {
pr_warn_ratelimited("set kvm_intel.dump_invalid_vmcs=1 to dump internal KVM state.\n");
@@ -5771,7 +5770,6 @@ void dump_vmcs(void)
cpu_based_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL);
cr4 = vmcs_readl(GUEST_CR4);
- efer = vmcs_read64(GUEST_IA32_EFER);
secondary_exec_control = 0;
if (cpu_has_secondary_exec_ctrls())
secondary_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
@@ -5784,8 +5782,7 @@ void dump_vmcs(void)
cr4, vmcs_readl(CR4_READ_SHADOW), vmcs_readl(CR4_GUEST_HOST_MASK));
pr_err("CR3 = 0x%016lx\n", vmcs_readl(GUEST_CR3));
if ((secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT) &&
- (cr4 & X86_CR4_PAE) && !(efer & EFER_LMA))
- {
+ (cr4 & X86_CR4_PAE)) {
pr_err("PDPTR0 = 0x%016llx PDPTR1 = 0x%016llx\n",
vmcs_read64(GUEST_PDPTR0), vmcs_read64(GUEST_PDPTR1));
pr_err("PDPTR2 = 0x%016llx PDPTR3 = 0x%016llx\n",
@@ -5811,7 +5808,8 @@ void dump_vmcs(void)
if ((vmexit_ctl & (VM_EXIT_SAVE_IA32_PAT | VM_EXIT_SAVE_IA32_EFER)) ||
(vmentry_ctl & (VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_IA32_EFER)))
pr_err("EFER = 0x%016llx PAT = 0x%016llx\n",
- efer, vmcs_read64(GUEST_IA32_PAT));
+ vmcs_read64(GUEST_IA32_EFER),
+ vmcs_read64(GUEST_IA32_PAT));
pr_err("DebugCtl = 0x%016llx DebugExceptions = 0x%016lx\n",
vmcs_read64(GUEST_IA32_DEBUGCTL),
vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS));
--
2.30.0
