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hv: reset VM ioreqs in reset_vm

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ioreqs acrossing VM reset is meaningless. So we reset their status when
VM reset.
Please note, device model and service os need to handle various ioreqs
pending status in emergency reset condition carefully. Otherwises, the
post processing of such ioreqs might overwrite this reset.

Tracked-On: projectacrn#1821
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Shuo Liu 2018-10-12 09:27:17 +08:00 committed by wenlingz
parent 2fa67a4471
commit 61e6c1f054
3 changed files with 29 additions and 0 deletions
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1
hypervisor/arch/x86/guest/vm.c
View File

@ -255,6 +255,7 @@ int reset_vm(struct acrn_vm *vm)
(void )vm_sw_loader(vm);
}
reset_vm_ioreqs(vm);
vioapic_reset(vm_ioapic(vm));
destroy_secure_world(vm, false);
vm->sworld_control.flag.active = 0UL;

19
hypervisor/common/io_request.c
View File

@ -55,6 +55,25 @@ static void acrn_print_request(uint16_t vcpu_id, const struct vhm_request *req)
}
}
/**
* @brief Reset all IO requests status of the VM
*
* @param vm The VM whose IO requests to be reset
*
* @return N/A
*/
void reset_vm_ioreqs(struct acrn_vm *vm)
{
uint16_t i;
union vhm_request_buffer *req_buf;
req_buf = vm->sw.io_shared_page;
for (i = 0U; i < VHM_REQUEST_MAX; i++) {
req_buf->req_queue[i].valid = 0U;
atomic_store32(&req_buf->req_queue[i].processed, REQ_STATE_FREE);
}
}
/**
* @brief Deliver \p io_req to SOS and suspend \p vcpu till its completion
*

9
hypervisor/include/arch/x86/ioreq.h
View File

@ -287,6 +287,15 @@ void emulate_io_post(struct acrn_vcpu *vcpu);
*/
int32_t acrn_insert_request_wait(struct acrn_vcpu *vcpu, const struct io_request *io_req);
/**
* @brief Reset all IO requests status of the VM
*
* @param vm The VM whose IO requests to be reset
*
* @return N/A
*/
void reset_vm_ioreqs(struct acrn_vm *vm);
/**
* @}
*/