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 /include | |
| 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 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index cba8fc4529e8..4ff5ea29e343 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -190,6 +190,7 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req); #define KVM_USERSPACE_IRQ_SOURCE_ID 0 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 +#define KVM_PIT_IRQ_SOURCE_ID 2 extern struct mutex kvm_lock; extern struct list_head vm_list; |