diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-06-11 14:35:49 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-06-20 13:52:47 -0700 |
| commit | 61423c413a746fd5fe5b0d865ea722e11b01105e (patch) | |
| tree | 2167d357c9379f153b9a82218a134d97a65c4db6 /arch/x86/kvm/x86.c | |
| parent | 77a74b8ff41ae620f5a5d727d596b670b7b9994e (diff) | |
KVM: x86: Hardcode the PIT IRQ source ID to '2'
Hardcode the PIT's source IRQ ID to '2' instead of "finding" that bit 2
is always the first available bit in irq_sources_bitmap. Bits 0 and 1 are
set/reserved by kvm_arch_init_vm(), i.e. long before kvm_create_pit() can
be invoked, and KVM allows at most one in-kernel PIT instance, i.e. it's
impossible for the PIT to find a different free bit (there are no other
users of kvm_request_irq_source_id().
Delete the now-defunct irq_sources_bitmap and all its associated code.
Acked-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20250611213557.294358-11-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 53f2ce2d40de..1d744730985e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -12669,12 +12669,6 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); atomic_set(&kvm->arch.noncoherent_dma_count, 0); - /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ - set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); - /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ - set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, - &kvm->arch.irq_sources_bitmap); - raw_spin_lock_init(&kvm->arch.tsc_write_lock); mutex_init(&kvm->arch.apic_map_lock); seqcount_raw_spinlock_init(&kvm->arch.pvclock_sc, &kvm->arch.tsc_write_lock); |