Hi,
On 4/29/2024 9:27 PM, Alejandro Jimenez wrote:
> After discussion in the RFC thread[0], the following items were identified as
> desirable to expose via the stats interface:
>
> - APICv status: (apicv_enabled, boolean, per-vCPU)
>
> - Guest using SynIC's AutoEOI: (synic_auto_eoi_used, boolean, per-VM)
>
> - KVM PIT in reinject mode inhibits AVIC: (pit_reinject_mode, boolean, per-VM)
>
> - APICv unaccelerated injections causing a vmexit (i.e. AVIC_INCOMPLETE_IPI,
> AVIC_UNACCELERATED_ACCESS, APIC_WRITE): (apicv_unaccelerated_inj, counter,
> per-vCPU)
>
> Example retrieving the newly introduced stats for guest running on AMD Genoa
> host, with AVIC enabled:
I have reviewed generic and AMD driver related code. Also tested this series on
AMD systems and its working fine.
Tested-by: Vasant Hegde <vasant.hegde@xxxxxxx>
-Vasant
>
> (QEMU) query-stats target=vcpu vcpus=['/machine/unattached/device[0]'] providers=[{'provider':'kvm','names':['apicv_unaccelerated_inj','apicv_active']}]
> {
> "return": [
> {
> "provider": "kvm",
> "qom-path": "/machine/unattached/device[0]",
> "stats": [
> {
> "name": "apicv_unaccelerated_inj",
> "value": 2561
> },
> {
> "name": "apicv_active",
> "value": true
> }
> ]
> }
> ]
> }
> (QEMU) query-stats target=vm providers=[{'provider':'kvm','names':['pit_reinject_mode','synic_auto_eoi_used']}]
> {
> "return": [
> {
> "provider": "kvm",
> "stats": [
> {
> "name": "pit_reinject_mode",
> "value": false
> },
> {
> "name": "synic_auto_eoi_used",
> "value": false
> }
> ]
> }
> ]
> }
>
> Changes were also sanity tested on Intel Sapphire Rapids platform, with/without
> IPI virtualization.
>
> Regards,
> Alejandro
>
> [0] https://lore.kernel.org/all/20240215160136.1256084-1-alejandro.j.jimenez@xxxxxxxxxx/
>
> Alejandro Jimenez (4):
> KVM: x86: Expose per-vCPU APICv status
> KVM: x86: Add a VM stat exposing when SynIC AutoEOI is in use
> KVM: x86: Add a VM stat exposing when KVM PIT is set to reinject mode
> KVM: x86: Add vCPU stat for APICv interrupt injections causing #VMEXIT
>
> arch/x86/include/asm/kvm_host.h | 4 ++++
> arch/x86/kvm/hyperv.c | 2 ++
> arch/x86/kvm/i8254.c | 2 ++
> arch/x86/kvm/lapic.c | 1 +
> arch/x86/kvm/svm/avic.c | 7 +++++++
> arch/x86/kvm/vmx/vmx.c | 2 ++
> arch/x86/kvm/x86.c | 7 ++++++-
> 7 files changed, 24 insertions(+), 1 deletion(-)
>
>
> base-commit: 7b076c6a308ec5bce9fc96e2935443ed228b9148
