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HV: add hypercall to monitor UOS PTdev intr status

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The hypercall can be used by SOS/DM to monitor UOS
pass-thru devices' interrupt data; and if an "interrupt
storm" happens in UOS, it can be used to delay the UOS
PTdev interrupt's injection for sometime.

The two functions are implemented by one hypercall with
two sub-commands, and with the data/params in the buffer.

Tracked-On: #866
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Minggui Cao
2018-09-13 16:51:34 +08:00
committed by lijinxia
parent 918403f925
commit d123083fa9
5 changed files with 82 additions and 0 deletions
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44
hypervisor/common/hypercall.c
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@@ -995,3 +995,47 @@ int32_t hcall_get_cpu_pm_state(struct vm *vm, uint64_t cmd, uint64_t param)
}
}
/**
*@pre Pointer vm shall point to VM0
*/
int32_t hcall_vm_intr_monitor(struct vm *vm, uint16_t vmid, uint64_t param)
{
struct acrn_intr_monitor *intr_hdr;
uint64_t hpa;
struct vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm == NULL) {
return -1;
}
/* the param for this hypercall is page aligned */
hpa = gpa2hpa(vm, param);
if (hpa == 0UL) {
pr_err("%s: invalid GPA.\n", __func__);
return -EINVAL;
}
intr_hdr = (struct acrn_intr_monitor *)hpa2hva(hpa);
switch (intr_hdr->cmd) {
case INTR_CMD_GET_DATA:
intr_hdr->buf_cnt = get_vm_ptdev_intr_data(target_vm,
intr_hdr->buffer, intr_hdr->buf_cnt);
break;
case INTR_CMD_DELAY_INT:
/* buffer[0] is the delay time (in MS), if 0 to cancel delay */
target_vm->intr_inject_delay_delta =
intr_hdr->buffer[0] * CYCLES_PER_MS;
break;
default:
/* if cmd wrong it goes here should not happen */
break;
}
pr_dbg("intr monitor:%d, cnt=%d", intr_hdr->cmd, intr_hdr->buf_cnt);
return 0;
}