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| author | Radim Krčmář <rkrcmar@redhat.com> | 2016-07-12 22:09:20 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-14 09:03:53 +0200 |
| commit | 0ca52e7b81a37260c7edb823c8ac6a49c6280b5e (patch) | |
| tree | 6116f41d00673db8be0280dfca84dfb274da8096 /arch/x86/include/asm | |
| parent | KVM: x86: use physical LAPIC array for logical x2APIC (diff) | |
| download | linux-0ca52e7b81a37260c7edb823c8ac6a49c6280b5e.tar.xz linux-0ca52e7b81a37260c7edb823c8ac6a49c6280b5e.zip | |
KVM: x86: dynamic kvm_apic_map
x2APIC supports up to 2^32-1 LAPICs, but most guest in coming years will
probably has fewer VCPUs. Dynamic size saves memory at the cost of
turning one constant into a variable.
apic_map mutex had to be moved before allocation to avoid races with cpu
hotplug.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 623089c4e1a7..a2832cc3cb81 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -682,11 +682,12 @@ struct kvm_arch_memory_slot { struct kvm_apic_map { struct rcu_head rcu; u8 mode; - struct kvm_lapic *phys_map[256]; + u32 max_apic_id; union { struct kvm_lapic *xapic_flat_map[8]; struct kvm_lapic *xapic_cluster_map[16][4]; }; + struct kvm_lapic *phys_map[]; }; /* Hyper-V emulation context */ |