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hv: dynamically configure CPU affinity through hypercall

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- add a new member cpu_affinity to struct acrn_create_vm, so that acrn-dm
  is able to assign CPU affinity through HC_CREATE_VM hypercall.

- if vm_create.cpu_affinity is zero, hypervisor launches the VM with the
  statically configured CPU affinity.

Tracked-On: #4616
Signed-off-by: Zide Chen <zide.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Zide Chen 2020-04-08 12:22:13 -07:00 committed by wenlingz
parent 467539441b
commit 0805eb9a56
2 changed files with 34 additions and 13 deletions
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20
hypervisor/common/hypercall.c
View File

@ -166,9 +166,22 @@ int32_t hcall_create_vm(struct acrn_vm *vm, uint64_t param)
/* Filter out the bits should not set by DM and then assign it to guest_flags */
vm_config->guest_flags |= (cv.vm_flag & DM_OWNED_GUEST_FLAG_MASK);
/* GUEST_FLAG_RT must be set if we have GUEST_FLAG_LAPIC_PASSTHROUGH set in guest_flags */
if (((vm_config->guest_flags & GUEST_FLAG_LAPIC_PASSTHROUGH) != 0U)
&& ((vm_config->guest_flags & GUEST_FLAG_RT) == 0U)) {
/* post-launched VM is allowed to choose pCPUs from vm_config->cpu_affinity_bitmap only */
if ((cv.cpu_affinity & ~(vm_config->cpu_affinity_bitmap)) != 0UL) {
pr_err("%s: Post-launch VM can't share PCPU with Pre-launch VM!", __func__);
} else {
/* DM could overwrite the statically configured PCPU bitmap */
if (bitmap_weight(cv.cpu_affinity) != 0U) {
vm_config->vcpu_num = bitmap_weight(cv.cpu_affinity);
vm_config->cpu_affinity_bitmap = cv.cpu_affinity;
}
/*
* GUEST_FLAG_RT must be set if we have GUEST_FLAG_LAPIC_PASSTHROUGH
* set in guest_flags
*/
if (((vm_config->guest_flags & GUEST_FLAG_LAPIC_PASSTHROUGH) != 0UL)
&& ((vm_config->guest_flags & GUEST_FLAG_RT) == 0UL)) {
pr_err("Wrong guest flags 0x%lx\n", vm_config->guest_flags);
} else {
if (create_vm(vm_id, vm_config, &target_vm) != 0) {
@ -184,6 +197,7 @@ int32_t hcall_create_vm(struct acrn_vm *vm, uint64_t param)
}
}
}
}
return ret;
}

9
hypervisor/include/public/acrn_common.h
View File

@ -360,8 +360,15 @@ struct acrn_create_vm {
uint64_t req_buf;
/**
* The least significant set bit is the PCPU # the VCPU 0 maps to;
* second set least significant bit is the PCPU # the VCPU 1 maps to;
* and so on...
*/
uint64_t cpu_affinity;
/** Reserved for future use*/
uint8_t reserved2[16];
uint8_t reserved2[8];
} __aligned(8);
/**