On 2/19/2026 11:12 AM, Manali Shukla wrote: > This patch adds the minimal UAPI definitions required for extended > LAPIC support. These definitions will be imported via the standard > scripts/update-linux-headers.sh process once the kernel patches are > merged. > > This patch is provided only for testing and review purposes and > should NOT be merged. > > Kernel patches: https://lore.kernel.org/kvm/...
Sorry. I missed to add the correct link. Kernel patches for this changes are available at: https://lore.kernel.org/kvm/[email protected]/T/#u -Manali > > Signed-off-by: Manali Shukla <[email protected]> > > --- > NOT-FOR-MERGE > --- > --- > linux-headers/asm-x86/kvm.h | 7 +++++++ > linux-headers/linux/kvm.h | 7 +++++++ > 2 files changed, 14 insertions(+) > > diff --git a/linux-headers/asm-x86/kvm.h b/linux-headers/asm-x86/kvm.h > index f0c1a730d9..04d1a1a527 100644 > --- a/linux-headers/asm-x86/kvm.h > +++ b/linux-headers/asm-x86/kvm.h > @@ -124,6 +124,13 @@ struct kvm_lapic_state { > char regs[KVM_APIC_REG_SIZE]; > }; > > + > +/* for KVM_GET_LAPIC2 and KVM_SET_LAPIC2 */ > +#define KVM_APIC_EXT_REG_SIZE 0x1000 > +struct kvm_lapic_state2 { > + char regs[KVM_APIC_EXT_REG_SIZE]; > +}; > + > struct kvm_segment { > __u64 base; > __u32 limit; > diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h > index 32c5885a3c..4e67281e99 100644 > --- a/linux-headers/linux/kvm.h > +++ b/linux-headers/linux/kvm.h > @@ -637,6 +637,10 @@ struct kvm_ioeventfd { > #define KVM_X86_DISABLE_EXITS_PAUSE (1 << 2) > #define KVM_X86_DISABLE_EXITS_CSTATE (1 << 3) > > +#define KVM_X86_NR_EXTLVT_DEFAULT 4 > +#define KVM_LAPIC2_DEFAULT (1 << 0) > +#define KVM_LAPIC2_AMD_DEFAULT (1 << 1) > + > /* for KVM_ENABLE_CAP */ > struct kvm_enable_cap { > /* in */ > @@ -952,6 +956,7 @@ struct kvm_enable_cap { > #define KVM_CAP_ARM_EL2 240 > #define KVM_CAP_ARM_EL2_E2H0 241 > #define KVM_CAP_RISCV_MP_STATE_RESET 242 > +#define KVM_CAP_LAPIC2 247 > > struct kvm_irq_routing_irqchip { > __u32 irqchip; > @@ -1308,6 +1313,8 @@ struct kvm_vfio_spapr_tce { > #define KVM_SET_FPU _IOW(KVMIO, 0x8d, struct kvm_fpu) > #define KVM_GET_LAPIC _IOR(KVMIO, 0x8e, struct kvm_lapic_state) > #define KVM_SET_LAPIC _IOW(KVMIO, 0x8f, struct kvm_lapic_state) > +#define KVM_GET_LAPIC2 _IOR(KVMIO, 0x8e, struct kvm_lapic_state2) > +#define KVM_SET_LAPIC2 _IOW(KVMIO, 0x8f, struct kvm_lapic_state2) > #define KVM_SET_CPUID2 _IOW(KVMIO, 0x90, struct kvm_cpuid2) > #define KVM_GET_CPUID2 _IOWR(KVMIO, 0x91, struct kvm_cpuid2) > /* Available with KVM_CAP_VAPIC */
