From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= Subject: [PATCH 4/4] KVM: x86: enable configurable MAX_VCPU Date: Thu, 13 Apr 2017 22:19:51 +0200 Message-ID: <20170413201951.11939-5-rkrcmar@redhat.com> References: <20170413201951.11939-1-rkrcmar@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Christoffer Dall , Marc Zyngier , Paolo Bonzini , Christian Borntraeger , Cornelia Huck , James Hogan , Paul Mackerras , Alexander Graf To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Return-path: In-Reply-To: <20170413201951.11939-1-rkrcmar@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org The only user of KVM_MAX_VCPU is switched to kvm->max_vcpu. The limit could have been INT_MAX as it makes no difference, but there is no point in making it bigger than KVM_MAX_VCPU_ID. Signed-off-by: Radim Krčmář --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/irq_comm.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 2cc5ec7cc6f5..eeeb88eedabf 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -38,6 +38,7 @@ #define KVM_MAX_VCPUS 288 #define KVM_SOFT_MAX_VCPUS 240 #define KVM_MAX_VCPU_ID 1023 +#define KVM_CONFIGURABLE_MAX_VCPUS KVM_MAX_VCPU_ID #define KVM_USER_MEM_SLOTS 509 /* memory slots that are not exposed to userspace */ #define KVM_PRIVATE_MEM_SLOTS 3 diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c index 4517a4c2ac3a..a7baeb44539a 100644 --- a/arch/x86/kvm/irq_comm.c +++ b/arch/x86/kvm/irq_comm.c @@ -60,7 +60,7 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, { int i, r = -1; struct kvm_vcpu *vcpu, *lowest = NULL; - unsigned long dest_vcpu_bitmap[BITS_TO_LONGS(KVM_MAX_VCPUS)]; + unsigned long dest_vcpu_bitmap[BITS_TO_LONGS(kvm->max_vcpus)]; unsigned int dest_vcpus = 0; if (irq->dest_mode == 0 && irq->dest_id == 0xff && @@ -101,7 +101,7 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, if (dest_vcpus != 0) { int idx = kvm_vector_to_index(irq->vector, dest_vcpus, - dest_vcpu_bitmap, KVM_MAX_VCPUS); + dest_vcpu_bitmap, kvm->max_vcpus); lowest = kvm_get_vcpu(kvm, idx); } -- 2.12.0