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hv: send IPI instead of irq injection to notify vcpu with lapic pt

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For VM with local apic pt for realtime scenatios, we support virtio device with PMD backend.
But we still need to inject MSI to notify the front-end, to avoid changing the front-end drivers.

Since the lapic is passed through, irq injection to vlapic won't work.
This commit fix it by sending IPI with vector need to inject.

Tracked-On: #2351
Signed-off-by: Yan, Like <like.yan@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yan, Like
2018-12-22 20:12:53 +08:00
committed by wenlingz
parent 16df57aa44
commit e2cecfb560
6 changed files with 131 additions and 28 deletions
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57
hypervisor/arch/x86/guest/vlapic.c
View File

@@ -101,7 +101,7 @@ vm_lapic_from_vcpu_id(struct acrn_vm *vm, uint16_t vcpu_id)
return vcpu_vlapic(vcpu);
}
static uint16_t vm_apicid2vcpu_id(struct acrn_vm *vm, uint8_t lapicid)
static uint16_t vm_apicid2vcpu_id(struct acrn_vm *vm, uint32_t lapicid)
{
uint16_t i;
struct acrn_vcpu *vcpu;
@@ -117,7 +117,7 @@ static uint16_t vm_apicid2vcpu_id(struct acrn_vm *vm, uint8_t lapicid)
if (cpu_id == INVALID_CPU_ID) {
cpu_id = get_pcpu_nums();
pr_err("%s: bad lapicid %hhu", __func__, lapicid);
pr_err("%s: bad lapicid %lu", __func__, lapicid);
}
return cpu_id;
@@ -1045,7 +1045,7 @@ vlapic_calcdest(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys, b
* Physical mode: destination is LAPIC ID.
*/
*dmask = 0UL;
vcpu_id = vm_apicid2vcpu_id(vm, (uint8_t)dest);
vcpu_id = vm_apicid2vcpu_id(vm, dest);
if (vcpu_id < vm->hw.created_vcpus) {
bitmap_set_lock(vcpu_id, dmask);
}
@@ -1135,6 +1135,57 @@ vlapic_calcdest(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys, b
}
}
/*
* This function populates 'dmask' with the set of vcpus that is the possible destination
* when lapic is passthru.
*/
void
vlapic_calcdest_lapic_pt(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys)
{
struct acrn_vlapic *vlapic;
struct acrn_vcpu *vcpu;
uint32_t ldr, logical_id, dest_logical_id, dest_cluster_id;
uint16_t vcpu_id;
if (dest == 0xffU) {
/*
* Broadcast in both logical and physical modes.
*/
*dmask = vm_active_cpus(vm);
} else if (phys) {
/*
* Physical mode: destination is LAPIC ID.
*/
*dmask = 0UL;
vcpu_id = vm_apicid2vcpu_id(vm, dest);
if (vcpu_id < vm->hw.created_vcpus) {
bitmap_set_lock(vcpu_id, dmask);
}
dev_dbg(ACRN_DBG_LAPICPT, "%s: phys destmod, dmask: 0x%016llx", __func__, *dmask);
} else {
/*
* Logical mode: match each APIC that has a bit set
* in its LDR that matches a bit in the ldest.
*/
foreach_vcpu(vcpu_id, vm, vcpu) {
vlapic = vm_lapic_from_vcpu_id(vm, vcpu_id);
ldr = vlapic->apic_page.ldr.v;
logical_id = ldr & 0xFFFFU;
dest_cluster_id = (dest >> 16U) & 0xFFFFU;
dest_logical_id = dest & 0xFFFFU;
if (dest_cluster_id != ((ldr >> 16U) & 0xFFFFU)) {
continue;
}
if ((dest_logical_id & logical_id) != 0U) {
bitmap_set_lock(vcpu_id, dmask);
}
}
dev_dbg(ACRN_DBG_LAPICPT, "%s: logical destmod, dmask: 0x%016llx", __func__, *dmask);
}
}
static void
vlapic_set_tpr(struct acrn_vlapic *vlapic, uint32_t val)
{

21
hypervisor/arch/x86/lapic.c
View File

@@ -6,27 +6,6 @@
#include <hypervisor.h>
/* x2APIC Interrupt Command Register (ICR) structure */
union apic_icr {
uint64_t value;
struct {
uint32_t lo_32;
uint32_t hi_32;
} value_32;
struct {
uint32_t vector:8;
uint32_t delivery_mode:3;
uint32_t destination_mode:1;
uint32_t rsvd_1:2;
uint32_t level:1;
uint32_t trigger_mode:1;
uint32_t rsvd_2:2;
uint32_t shorthand:2;
uint32_t rsvd_3:12;
uint32_t dest_field:32;
} bits;
};
union lapic_base_msr {
uint64_t value;
struct {