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Re: [PATCH v3] target/i386: Set maximum APIC ID to KVM prior to vCPU cre
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From: |
Peter Xu |
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Subject: |
Re: [PATCH v3] target/i386: Set maximum APIC ID to KVM prior to vCPU creation |
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Date: |
Fri, 9 Sep 2022 12:11:10 -0400 |
On Thu, Aug 25, 2022 at 10:52:46AM +0800, Zeng Guang wrote:
> Specify maximum possible APIC ID assigned for current VM session to KVM
> prior to the creation of vCPUs. By this setting, KVM can set up VM-scoped
> data structure indexed by the APIC ID, e.g. Posted-Interrupt Descriptor
> pointer table to support Intel IPI virtualization, with the most optimal
> memory footprint.
>
> It can be achieved by calling KVM_ENABLE_CAP for KVM_CAP_MAX_VCPU_ID
> capability once KVM has enabled it. Ignoring the return error if KVM
> doesn't support this capability yet.
>
> Signed-off-by: Zeng Guang <guang.zeng@intel.com>
Acked-by: Peter Xu <peterx@redhat.com>
--
Peter Xu