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HV: io: add post-work for PCICFG and WP requests

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Currently no post-work is done for I/O requests of type PCICFG or WP. The
impacts include:

    1. ''valid'' in VHM request buffers are left as 1 even after the I/O request
       completes. This violates the pre-condition of acrn_insert_request_wait()
       but does not cause failures since a new I/O request can never happen
       before the previous one completes.

    2. Values read from PCI configuration spaces are never passed to UOS.

This patch adds the post-work for these two kinds of I/O requests. The post-work
for port I/O is invoked for PCICFG since it is essentially a port I/O and the
request structure is compatible. No post-work is needed for WP as it is only
triggered for EPT violations on writes, while post-work is mainly for reads.

v2 -> v3:

    * Consistently use 0/1 (not false/true) for the ''valid'' member.
    * Add comments to suggest when the hypervisor can see REQ_PCICFG and why
      dm_emulate_pio_post also works in such cases.
    * Rename: mark_ioreq_done -> complete_ioreq
    * Rename: complete_request -> emulate_io_post
    * Rename: hcall_notify_req_finish -> hcall_notify_ioreq_finish

Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
This commit is contained in:
Junjie Mao
2018-07-27 18:15:24 +08:00
committed by lijinxia
parent 26ab2c9146
commit d8179519b9
3 changed files with 29 additions and 12 deletions
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2
hypervisor/include/common/hypercall.h
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@@ -203,7 +203,7 @@ int32_t hcall_set_ioreq_buffer(struct vm *vm, uint16_t vmid, uint64_t param);
*
* @return 0 on success, non-zero on error.
*/
int32_t hcall_notify_req_finish(uint16_t vmid, uint16_t vcpu_id);
int32_t hcall_notify_ioreq_finish(uint16_t vmid, uint16_t vcpu_id);
/**
* @brief setup ept memory mapping