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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-08-22 12:18:28 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-10-17 00:29:43 +0200 |
| commit | 9170200ec0ebad70e5b9902bc93e2b1b11456a3b (patch) | |
| tree | 2a935ca68f0dea412ba37fa77380cd6306583804 /kernel/kexec_file.c | |
| parent | 0624fca9512d08cbd9b5d098d904c840d3432404 (diff) | |
KVM: x86: hyperv: enforce vp_index < KVM_MAX_VCPUS
Hyper-V TLFS (5.0b) states:
> Virtual processors are identified by using an index (VP index). The
> maximum number of virtual processors per partition supported by the
> current implementation of the hypervisor can be obtained through CPUID
> leaf 0x40000005. A virtual processor index must be less than the
> maximum number of virtual processors per partition.
Forbid userspace to set VP_INDEX above KVM_MAX_VCPUS. get_vcpu_by_vpidx()
can now be optimized to bail early when supplied vpidx is >= KVM_MAX_VCPUS.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'kernel/kexec_file.c')
0 files changed, 0 insertions, 0 deletions