Support more than 255 CPUs on x86#344
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Lencerf merged 4 commits intogoogle:mainfrom Dec 20, 2025
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Signed-off-by: Changyuan Lyu <changyuanl@google.com>
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Signed-off-by: Changyuan Lyu <changyuanl@google.com>
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KVM_FEATURE_MSI_EXT_DEST_ID allows the guest to encode bit 8-14 of x2APIC ID into bit 5-11 of MSI address. Theoretically, up to 32768 CPUs are supported with such hack. Signed-off-by: Changyuan Lyu <changyuanl@google.com>
When booted in x2APC mode, Linux is able to bring up CPUs with x2APIC ID > 254. Signed-off-by: Changyuan Lyu <changyuanl@google.com>
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