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| author | Gleb Natapov <gleb@redhat.com> | 2012-09-13 14:19:24 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-09-20 12:05:26 (GMT) |
| commit | 1e08ec4a130e2745d96df169e67c58df98a07311 (patch) | |
| tree | 362647f5b0bac59e7fe93ce66775afac2cd7da79 /arch/x86/include/asm | |
| parent | 1d86b5cc4c6d9a1be1458be3701ac9c915a9706f (diff) | |
| download | linux-1e08ec4a130e2745d96df169e67c58df98a07311.tar.xz | |
KVM: optimize apic interrupt delivery
Most interrupt are delivered to only one vcpu. Use pre-build tables to
find interrupt destination instead of looping through all vcpus. In case
of logical mode loop only through vcpus in a logical cluster irq is sent
to.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 43aeb94..0b902c9 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -525,6 +525,16 @@ struct kvm_arch_memory_slot { struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; }; +struct kvm_apic_map { + struct rcu_head rcu; + u8 ldr_bits; + /* fields bellow are used to decode ldr values in different modes */ + u32 cid_shift, cid_mask, lid_mask; + struct kvm_lapic *phys_map[256]; + /* first index is cluster id second is cpu id in a cluster */ + struct kvm_lapic *logical_map[16][16]; +}; + struct kvm_arch { unsigned int n_used_mmu_pages; unsigned int n_requested_mmu_pages; @@ -542,6 +552,8 @@ struct kvm_arch { struct kvm_ioapic *vioapic; struct kvm_pit *vpit; int vapics_in_nmi_mode; + struct mutex apic_map_lock; + struct kvm_apic_map *apic_map; unsigned int tss_addr; struct page *apic_access_page; |