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hv: pirq: refactor vector allocation/free

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This commit refactors vector allocation/free codes, two functions are
defined to help alloc/free vectors for an irq:
- uint32_t alloc_irq_vector(uint32_t irq)
  - alloc a free vector (0x20 ~ 0xDF), and bind it to irq, for legacy irqs
    and static mapped irqs, vector has been allocated and bind, so just
    check the mapping correctness;
  - return: valid vector on success, VECTOR_INVALID on failure.

- void free_irq_vector(uint32_t irq)
  - free vector allocated via alloc_irq_vector(), for legacy irqs and static
    mapped irqs, nothing need to do.

Signed-off-by: Yan, Like <like.yan@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yan, Like
2018-08-16 19:40:46 +08:00
committed by lijinxia
parent 1bf2fc342a
commit 2c044e0c4e
4 changed files with 94 additions and 147 deletions
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3
hypervisor/include/arch/x86/irq.h
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@@ -75,6 +75,9 @@ typedef void (*spurious_handler_t)(uint32_t vector);
extern spurious_handler_t spurious_handler;
uint32_t alloc_irq_num(uint32_t req_irq);
uint32_t alloc_irq_vector(uint32_t irq);
uint32_t irq_to_vector(uint32_t irq);
/*
* Some MSI message definitions