Changes since v1 (Sean):
- Use common 'enable_apicv' variable for both APICv and AVIC instead of
adding a new hook to 'struct kvm_x86_ops'.
- Drop unneded CONFIG_X86_LOCAL_APIC checks from VMX/SVM code along the
way.
Original description:
APICV_INHIBIT_REASON_HYPERV is currently unconditionally forced upon
SynIC activation as SynIC's AutoEOI is incompatible with APICv/AVIC. It is,
however, possible to track whether the feature was actually used by the
guest and only inhibit APICv/AVIC when needed.
The feature can be tested with QEMU's 'hv-passthrough' debug mode.
Note, 'avic' kvm-amd module parameter is '0' by default and thus needs to
be explicitly enabled.
Vitaly Kuznetsov (5):
KVM: SVM: Drop unneeded CONFIG_X86_LOCAL_APIC check for AVIC
KVM: VMX: Drop unneeded CONFIG_X86_LOCAL_APIC check from
cpu_has_vmx_posted_intr()
KVM: x86: Use common 'enable_apicv' variable for both APICv and AVIC
KVM: x86: Invert APICv/AVIC enablement check
KVM: x86: hyper-v: Deactivate APICv only when AutoEOI feature is in
use
arch/x86/include/asm/kvm_host.h | 5 ++++-
arch/x86/kvm/hyperv.c | 27 +++++++++++++++++++++------
arch/x86/kvm/svm/avic.c | 16 +++++-----------
arch/x86/kvm/svm/svm.c | 24 +++++++++++++-----------
arch/x86/kvm/svm/svm.h | 2 --
arch/x86/kvm/vmx/capabilities.h | 4 +---
arch/x86/kvm/vmx/vmx.c | 2 --
arch/x86/kvm/x86.c | 9 ++++++---
8 files changed, 50 insertions(+), 39 deletions(-)
--
2.31.1
