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The TLFS structures are used for hypervisor-guest communication and must exactly meet the specification. Compilers can add alignment padding to structures or reorder struct members for randomization and optimization, which would break the hypervisor ABI. Mark the structures as packed to prevent this. 'struct hv_vp_assist_page' and 'struct hv_enlightened_vmcs' need to be properly padded to support the change. Suggested-by: Nadav Amit <nadav.amit@gmail.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Nadav Amit <nadav.amit@gmail.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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