diff options
Diffstat (limited to 'arch/x86/xen/apic.c')
| -rw-r--r-- | arch/x86/xen/apic.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c index 73ade38caa32..1913bf2d2a9c 100644 --- a/arch/x86/xen/apic.c +++ b/arch/x86/xen/apic.c @@ -1,8 +1,21 @@ #include <linux/init.h> #include <asm/x86_init.h> +#include <asm/apic.h> +#include <xen/interface/physdev.h> +#include <asm/xen/hypercall.h> unsigned int xen_io_apic_read(unsigned apic, unsigned reg) { + struct physdev_apic apic_op; + int ret; + + apic_op.apic_physbase = mpc_ioapic_addr(apic); + apic_op.reg = reg; + ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op); + if (!ret) + return apic_op.value; + + /* fallback to return an emulated IO_APIC values */ if (reg == 0x1) return 0x00170020; else if (reg == 0x0) |