TDX capable platforms are locked to X2APIC mode and cannot fall back to the legacy xAPIC mode when TDX is enabled by the BIOS. TDX host support requires x2APIC. Make INTEL_TDX_HOST depend on X86_X2APIC. Link: https://lore.kernel.org/lkml/ba80b303-31bf-d44a-b05d-5c0f83038798@xxxxxxxxx/ Signed-off-by: Kai Huang <kai.huang@xxxxxxxxx> Reviewed-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 3b3594f96330..a70f3f205969 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1944,6 +1944,7 @@ config INTEL_TDX_HOST depends on CPU_SUP_INTEL depends on X86_64 depends on KVM_INTEL + depends on X86_X2APIC help Intel Trust Domain Extensions (TDX) protects guest VMs from malicious host and certain physical attacks. This option enables necessary TDX -- 2.41.0
