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hv:enable APICv-Posted Interrupt

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to enable APICv Posted interrupt supported, following the
 specifications defined in Intel SDM Section #29.6, Volume3.

 Posted-interrupt processing is a feature by which a processor
 processes the virtual interrupts by recording them as pending
 on the virtual-APIC page.

 Injecting interrupts to VCPU from remote CPU without causing
 VM exit on the destination, following steps in SDM Section 29.6,volume3:

Tracked-On: #1447
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yonghua Huang
2018-10-09 19:50:58 +08:00
committed by Xie, Nanlin
parent a028567b9c
commit 38d5df723d
9 changed files with 80 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
hypervisor/arch/x86/guest/vlapic.c
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@@ -460,6 +460,7 @@ vlapic_set_intr_ready(struct acrn_vlapic *vlapic, uint32_t vector, bool level)
struct lapic_reg *irrptr, *tmrptr;
uint32_t mask;
uint32_t idx;
int pending_intr;
ASSERT(vector <= NR_MAX_VECTOR,
"invalid vector %u", vector);
@@ -480,7 +481,26 @@ vlapic_set_intr_ready(struct acrn_vlapic *vlapic, uint32_t vector, bool level)
}
if (is_apicv_intr_delivery_supported()) {
return apicv_set_intr_ready(vlapic, vector);
pending_intr = apicv_set_intr_ready(vlapic, vector);
if ((pending_intr != 0)
&& is_apicv_posted_intr_supported()
&& (get_cpu_id() != vlapic->vcpu->pcpu_id)) {
/*
* Send interrupt to vCPU via posted interrupt way:
* 1. If target vCPU is in non-root mode(running),
* send PI notification to vCPU and hardware will
* sync PIR to vIRR automatically.
* 2. If target vCPU is in root mode(isn't running),
* record this request as ACRN_REQUEST_EVENT,then
* will pick up the interrupt from PIR and inject
* it to vCPU in next vmentry.
*/
bitmap_set_lock(ACRN_REQUEST_EVENT,
&vlapic->vcpu->arch_vcpu.pending_req);
vlapic_post_intr(vlapic->vcpu->pcpu_id);
return 0;
}
return pending_intr;
}
idx = vector >> 5U;
@@ -508,6 +528,20 @@ vlapic_set_intr_ready(struct acrn_vlapic *vlapic, uint32_t vector, bool level)
return 1;
}
/* Post an interrupt to the vcpu running on 'hostcpu'. */
void vlapic_post_intr(uint16_t dest_pcpu_id)
{
send_single_ipi(dest_pcpu_id, VECTOR_POSTED_INTR);
}
uint64_t apicv_get_pir_desc_paddr(struct vcpu *vcpu)
{
struct acrn_vlapic *vlapic;
vlapic = &vcpu->arch_vcpu.vlapic;
return hva2hpa(&(vlapic->pir_desc));
}
/**
* @pre offset value shall be one of the folllowing values:
* APIC_OFFSET_CMCI_LVT
@@ -1817,8 +1851,6 @@ vlapic_set_intr(struct vcpu *vcpu, uint32_t vector, bool level)
vlapic = vcpu_vlapic(vcpu);
if (vlapic_set_intr_ready(vlapic, vector, level) != 0) {
vcpu_make_request(vcpu, ACRN_REQUEST_EVENT);
} else {
ret = -ENODEV;
}
return ret;