KVM: nVMX: Switch to vmcs01 to refresh APICv controls on-demand if L2 is active

Browse source

If APICv is (un)inhibited while L2 is running, temporarily load vmcs01 and
immediately refresh the APICv controls in vmcs01 instead of deferring the
update until the next nested VM-Exit.  This all but eliminates potential
ordering issues due to vmcs01 not being synchronized with
kvm_lapic.apicv_active, e.g. where KVM _thinks_ it refreshed APICv, but
vmcs01 still contains stale state.

Reviewed-by: Chao Gao <chao.gao@intel.com>
Link: https://patch.msgid.link/20260109034532.1012993-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

...

This commit is contained in:

Sean Christopherson 2026-01-08 19:45:29 -08:00

parent f0044429b2

commit 2bf889a68f

3 changed files with 1 additions and 10 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

arch/x86/kvm/vmx/nested.c

View file

5

arch/x86/kvm/vmx/vmx.c

View file

1

arch/x86/kvm/vmx/vmx.h

View file