1 | /* |
---|
2 | * Copied from arch/xen/i386/kernel/entry.S |
---|
3 | */ |
---|
4 | /* Offsets into shared_info_t. */ |
---|
5 | #define evtchn_upcall_pending /* 0 */ |
---|
6 | #define evtchn_upcall_mask 1 |
---|
7 | |
---|
8 | #define sizeof_vcpu_shift 6 |
---|
9 | |
---|
10 | #ifdef CONFIG_SMP |
---|
11 | //#define preempt_disable(reg) incl threadinfo_preempt_count(reg) |
---|
12 | //#define preempt_enable(reg) decl threadinfo_preempt_count(reg) |
---|
13 | #define preempt_disable(reg) |
---|
14 | #define preempt_enable(reg) |
---|
15 | #define XEN_GET_VCPU_INFO(reg) preempt_disable(%rbp) ; \ |
---|
16 | movq %gs:pda_cpunumber,reg ; \ |
---|
17 | shl $32, reg ; \ |
---|
18 | shr $32-sizeof_vcpu_shift,reg ; \ |
---|
19 | addq HYPERVISOR_shared_info,reg |
---|
20 | #define XEN_PUT_VCPU_INFO(reg) preempt_enable(%rbp) ; \ |
---|
21 | #define XEN_PUT_VCPU_INFO_fixup .byte 0xff,0xff,0xff |
---|
22 | #else |
---|
23 | #define XEN_GET_VCPU_INFO(reg) movq HYPERVISOR_shared_info,reg |
---|
24 | #define XEN_PUT_VCPU_INFO(reg) |
---|
25 | #define XEN_PUT_VCPU_INFO_fixup |
---|
26 | #endif |
---|
27 | |
---|
28 | #define XEN_LOCKED_BLOCK_EVENTS(reg) movb $1,evtchn_upcall_mask(reg) |
---|
29 | #define XEN_LOCKED_UNBLOCK_EVENTS(reg) movb $0,evtchn_upcall_mask(reg) |
---|
30 | #define XEN_BLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \ |
---|
31 | XEN_LOCKED_BLOCK_EVENTS(reg) ; \ |
---|
32 | XEN_PUT_VCPU_INFO(reg) |
---|
33 | #define XEN_UNBLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \ |
---|
34 | XEN_LOCKED_UNBLOCK_EVENTS(reg) ; \ |
---|
35 | XEN_PUT_VCPU_INFO(reg) |
---|
36 | #define XEN_TEST_PENDING(reg) testb $0xFF,evtchn_upcall_pending(reg) |
---|
37 | |
---|
38 | VGCF_IN_SYSCALL = (1<<8) |
---|
39 | |
---|
40 | |
---|