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| author | Radim Krčmář <rkrcmar@redhat.com> | 2016-07-12 23:09:30 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-14 10:29:35 +0300 |
| commit | af1bae5497b98cb99d6b0492e6981f060420a00c (patch) | |
| tree | 1c12ad6dfd42189f9ed58a40f4ddc4913efb177f /arch/x86/kvm/lapic.c | |
| parent | 682f732ecf7396e9d6fe24d44738966699fae6c0 (diff) | |
| download | linux-af1bae5497b98cb99d6b0492e6981f060420a00c.tar.xz | |
KVM: x86: bump KVM_MAX_VCPU_ID to 1023
kzalloc was replaced with kvm_kvzalloc to allow non-contiguous areas and
rcu had to be modified to cope with it.
The practical limit for KVM_MAX_VCPU_ID right now is INT_MAX, but lower
value was chosen in case there were bugs. 1023 is sufficient maximum
APIC ID for 288 VCPUs.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index a16e0bb95d28..6895fd28aae9 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -147,6 +147,13 @@ static inline bool kvm_apic_map_get_logical_dest(struct kvm_apic_map *map, } } +static void kvm_apic_map_free(struct rcu_head *rcu) +{ + struct kvm_apic_map *map = container_of(rcu, struct kvm_apic_map, rcu); + + kvfree(map); +} + static void recalculate_apic_map(struct kvm *kvm) { struct kvm_apic_map *new, *old = NULL; @@ -160,8 +167,8 @@ static void recalculate_apic_map(struct kvm *kvm) if (kvm_apic_present(vcpu)) max_id = max(max_id, kvm_apic_id(vcpu->arch.apic)); - new = kzalloc(sizeof(struct kvm_apic_map) + - sizeof(struct kvm_lapic *) * (max_id + 1), GFP_KERNEL); + new = kvm_kvzalloc(sizeof(struct kvm_apic_map) + + sizeof(struct kvm_lapic *) * ((u64)max_id + 1)); if (!new) goto out; @@ -206,7 +213,7 @@ out: mutex_unlock(&kvm->arch.apic_map_lock); if (old) - kfree_rcu(old, rcu); + call_rcu(&old->rcu, kvm_apic_map_free); kvm_make_scan_ioapic_request(kvm); } |