According to SDM, bit12 of ICR is no longer BUSY bit but UNUSED bit in x2APIC mode, which is the only difference of lower ICR between xAPIC and x2APIC mode. To avoid ambiguity, introduce X2APIC_ICR_UNUSED_12 for x2APIC mode. Signed-off-by: Tao Su <tao1.su@xxxxxxxxxxxxxxx> --- arch/x86/include/asm/apicdef.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h index 4b125e5b3187..ea2725738b81 100644 --- a/arch/x86/include/asm/apicdef.h +++ b/arch/x86/include/asm/apicdef.h @@ -78,6 +78,7 @@ #define APIC_INT_LEVELTRIG 0x08000 #define APIC_INT_ASSERT 0x04000 #define APIC_ICR_BUSY 0x01000 +#define X2APIC_ICR_UNUSED_12 0x01000 #define APIC_DEST_LOGICAL 0x00800 #define APIC_DEST_PHYSICAL 0x00000 #define APIC_DM_FIXED 0x00000 -- 2.34.1
