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