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hv: io: add unregister_mmio_emulation_handler API

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Since guest could re-program PCI device MSI-X table BAR, we should add mmio
emulation handler unregister.
However, after add unregister_mmio_emulation_handler API, emul_mmio_regions
is no longer accurate. Just replace it with max_emul_mmio_regions which records
the max index of the emul_mmio_node.

Tracked-On: #3475
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1
2019-10-25 18:23:56 +08:00
committed by wenlingz
parent dc1e2adaec
commit 2c158d5ad4
4 changed files with 113 additions and 33 deletions
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16
hypervisor/include/dm/io_req.h
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@@ -251,7 +251,7 @@ void register_pio_emulation_handler(struct acrn_vm *vm, uint32_t pio_idx,
/**
* @brief Register a MMIO handler
*
* This API registers a MMIO handler to \p vm before it is launched.
* This API registers a MMIO handler to \p vm.
*
* @param vm The VM to which the MMIO handler is registered
* @param read_write The handler for emulating accesses to the given range
@@ -265,6 +265,20 @@ void register_mmio_emulation_handler(struct acrn_vm *vm,
hv_mem_io_handler_t read_write, uint64_t start,
uint64_t end, void *handler_private_data);
/**
* @brief Unregister a MMIO handler
*
* This API unregisters a MMIO handler to \p vm
*
* @param vm The VM to which the MMIO handler is unregistered
* @param start The base address of the range which wants to unregister
* @param end The end of the range (exclusive) which wants to unregister
*
* @return None
*/
void unregister_mmio_emulation_handler(struct acrn_vm *vm,
uint64_t start, uint64_t end);
/**
* @}
*/