diff options
Diffstat (limited to 'linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S')
| -rw-r--r-- | linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S b/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S new file mode 100644 index 0000000000..e2bd1b561b --- /dev/null +++ b/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S @@ -0,0 +1,38 @@ +/* + * Copied from arch/xen/i386/kernel/entry.S + */ +/* Offsets into shared_info_t. */ +#define evtchn_upcall_pending 0 +#define evtchn_upcall_mask 1 + +#define sizeof_vcpu_shift 3 + +#ifdef CONFIG_SMP +#define preempt_disable(reg) incl threadinfo_preempt_count(reg) +#define preempt_enable(reg) decl threadinfo_preempt_count(reg) +#define XEN_GET_VCPU_INFO(reg) preempt_disable(%rbp) ; \ + movq %gs:pda_cpunumber,reg ; \ + shl $sizeof_vcpu_shift,reg ; \ + addq HYPERVISOR_shared_info,reg +#define XEN_PUT_VCPU_INFO(reg) preempt_enable(%rbp) ; \ +#define XEN_PUT_VCPU_INFO_fixup .byte 0xff,0xff,0xff +#else +#define XEN_GET_VCPU_INFO(reg) movq HYPERVISOR_shared_info,reg +#define XEN_PUT_VCPU_INFO(reg) +#define XEN_PUT_VCPU_INFO_fixup +#endif + +#define XEN_LOCKED_BLOCK_EVENTS(reg) movb $1,evtchn_upcall_mask(reg) +#define XEN_LOCKED_UNBLOCK_EVENTS(reg) movb $0,evtchn_upcall_mask(reg) +#define XEN_BLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \ + XEN_LOCKED_BLOCK_EVENTS(reg) ; \ + XEN_PUT_VCPU_INFO(reg) +#define XEN_UNBLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \ + XEN_LOCKED_UNBLOCK_EVENTS(reg) ; \ + XEN_PUT_VCPU_INFO(reg) +#define XEN_TEST_PENDING(reg) testb $0xFF,evtchn_upcall_pending(reg) + +EVENT_MASK = (CS+4) +VGCF_IN_SYSCALL = (1<<8) + + |