linux

iv/linux

History

Sean Christopherson a788fbb763 KVM: VMX: Skip VMCLEAR logic during emergency reboots if CR4.VMXE=0

Bail from vmx_emergency_disable() without processing the list of loaded
VMCSes if CR4.VMXE=0, i.e. if the CPU can't be post-VMXON.  It should be
impossible for the list to have entries if VMX is already disabled, and
even if that invariant doesn't hold, VMCLEAR will #UD anyways, i.e.
processing the list is pointless even if it somehow isn't empty.

Assuming no existing KVM bugs, this should be a glorified nop.  The
primary motivation for the change is to avoid having code that looks like
it does VMCLEAR, but then skips VMXON, which is nonsensical.

Suggested-by: Kai Huang <kai.huang@intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20230721201859.2307736-20-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

2023-08-03 15:37:15 -07:00

capabilities.h

KVM: VMX: Treat UMIP as emulated if and only if the host doesn't have UMIP

2023-05-26 13:50:42 -07:00

hyperv.c

KVM: VMX: Rename "KVM is using eVMCS" static key to match its wrapper

2023-03-14 10:28:58 -04:00

hyperv.h

KVM: VMX: Rename "KVM is using eVMCS" static key to match its wrapper

2023-03-14 10:28:58 -04:00

nested.c

KVM VMX changes for 6.5: