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x2apic is enabled in the defconfig, and interrupt remapping is an architectural dependency of x2apic as per the Intel SDM: Routing of device interrupts to local APIC units operating in x2APIC mode requires use of the interrupt-remapping architecture specified in the Intel® Virtualization Technology for Directed I/O (Revision 1.3 and/or later versions). Enable CONFIG_IRQ_REMAP in defconfig so that a defconfig kernel on bare metal actually uses x2apic. Co-developed-by: Rahul Bukte <rahul.bukte@sony.com> Signed-off-by: Rahul Bukte <rahul.bukte@sony.com> Signed-off-by: Shashank Balaji <shashank.mahadasyam@sony.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Sohil Mehta <sohil.mehta@intel.com> Acked-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20260306-x2apic-fix-v2-2-bee99c12efa3@sony.com