diff options
| -rw-r--r-- | xen/include/asm-x86/io_apic.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/xen/include/asm-x86/io_apic.h b/xen/include/asm-x86/io_apic.h index 59f8e0712e..5964521592 100644 --- a/xen/include/asm-x86/io_apic.h +++ b/xen/include/asm-x86/io_apic.h @@ -123,9 +123,12 @@ extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES]; /* non-0 if default (table-less) MP configuration */ extern int mpc_default_type; +/* Only need to remap ioapic RTE (reg: 10~3Fh) */ +#define ioapic_reg_remapped(reg) (iommu_enabled && ((reg) >= 0x10)) + static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) { - if (iommu_enabled) + if (ioapic_reg_remapped(reg)) return io_apic_read_remap_rte(apic, reg); *IO_APIC_BASE(apic) = reg; return *(IO_APIC_BASE(apic)+4); @@ -133,7 +136,7 @@ static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) { - if (iommu_enabled) + if (ioapic_reg_remapped(reg)) return iommu_update_ire_from_apic(apic, reg, value); *IO_APIC_BASE(apic) = reg; *(IO_APIC_BASE(apic)+4) = value; @@ -152,7 +155,7 @@ extern int sis_apic_bug; #endif static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value) { - if (iommu_enabled) + if (ioapic_reg_remapped(reg)) return iommu_update_ire_from_apic(apic, reg, value); if (sis_apic_bug) *IO_APIC_BASE(apic) = reg; |