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dm: add option "lapic_pt" to create VM for realtime scenarios

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New option "--lapic_pt" added to create VM with local apic passthrough, for
realtime scenarios.
When the option is set, a VM is created with LAPIC_PASSTHROUGH.
The option is not set by default.

Tracked-On: #2351
Signed-off-by: Yan, Like <like.yan@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yan, Like
2019-01-22 17:00:13 +08:00
committed by wenlingz
parent 8925da64d9
commit c873d60ae2
3 changed files with 18 additions and 2 deletions
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8
devicemodel/core/vmmapi.c
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@@ -138,6 +138,14 @@ vm_create(const char *name, uint64_t req_buf)
else
create_vm.vm_flag &= (~SECURE_WORLD_ENABLED);
if (lapic_pt) {
create_vm.vm_flag |= LAPIC_PASSTHROUGH;
create_vm.vm_flag |= IOREQ_COMPLETION_POLLING;
} else {
create_vm.vm_flag &= (~LAPIC_PASSTHROUGH);
create_vm.vm_flag &= (~IOREQ_COMPLETION_POLLING);
}
create_vm.req_buf = req_buf;
while (retry > 0) {
error = ioctl(ctx->fd, IC_CREATE_VM, &create_vm);