kvm: x86: Set KVM_MAX_VCPU_ID to 4*KVM_MAX_VCPUS

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Instead of requiring KVM_MAX_VCPU_ID to be manually increased
every time we increase KVM_MAX_VCPUS, set it to 4*KVM_MAX_VCPUS.
This should be enough for CPU topologies where Cores-per-Package
and Packages-per-Socket are not powers of 2.

In practice, this increases KVM_MAX_VCPU_ID from 1023 to 1152.
The only side effect of this change is making some fields in
struct kvm_ioapic larger, increasing the struct size from 1628 to
1780 bytes (in x86_64).

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20210903211600.2002377-2-ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Eduardo Habkost 2021-09-03 17:15:58 -04:00 • committed by Paolo Bonzini

parent 81b4b56d4f

commit 4ddacd525a

1 changed files with 13 additions and 1 deletions

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arch/x86/include/asm/kvm_host.h

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