github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-24 02:08:04 +00:00
Code Issues Projects Releases Wiki Activity

HV: io: refine state transitions of VHM requests

Browse Source 
Instead of using two members for maintaining the state of a VHM request, this
patch replaces the transitions with a single state. Basically the lifecycle of a
VHM request shall be:

    FREE -> PENDING -> PROCESSING -> COMPLETE -> FREE -> ...

The structure header of vhm_request has more details of the transitions access
limitations under different states.

Also drop the set but unused member vcpu.ioreq_pending.

For backward-compatibility, the obsolete 'valid' member is still kept and
maintained before SOS and DM adapts to the new state transitions.

v2 -> v3:

    * Use complete_ioreq to mark an I/O request finished in
      dm_emulate_(pio|mmio)_post.

Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Junjie Mao
2018-07-27 21:24:39 +08:00
committed by lijinxia
parent 941eb9db02
commit 17771c0ac2
8 changed files with 144 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
hypervisor/include/arch/x86/guest/vcpu.h
View File

@@ -248,7 +248,6 @@ struct vcpu {
bool launched; /* Whether the vcpu is launched on target pcpu */
uint32_t paused_cnt; /* how many times vcpu is paused */
uint32_t running; /* vcpu is picked up and run? */
uint32_t ioreq_pending; /* ioreq is ongoing or not? */
struct io_request req; /* used by io/ept emulation */