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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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20
hypervisor/include/arch/x86/lapic.h
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@@ -51,6 +51,26 @@ enum intr_cpu_startup_shorthand {
INTR_CPU_STARTUP_UNKNOWN,
};
/* 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;
};
/**
* @brief Save context of lapic