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hv: Interrupt handling in ACRN partition mode 

ACRN in partition mode does not have vector and APIC ID remapping for
device interrupts. Only MSIs are supported. No IOAPIC and legacy interrupts
for the VMs in ACRN partition mode.

Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
This commit is contained in:
Sainath Grandhi 2018-08-09 12:31:47 -07:00 committed by lijinxia
parent 0c88f9b800
commit d0e9f244ed
4 changed files with 33 additions and 0 deletions
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4
hypervisor/arch/x86/idt.S
View File

@ -389,7 +389,11 @@ external_interrupt_save_frame:
/* Put current stack pointer into 1st param register (rdi) */
movq %rsp, %rdi
#ifdef CONFIG_PARTITION_MODE
call partition_mode_dispatch_interrupt
#else
call dispatch_interrupt
#endif
/*
* We disable softirq path from interrupt IRET, since right now all IRQ

22
hypervisor/arch/x86/irq.c
View File

@ -431,6 +431,28 @@ ERR:
return;
}
#ifdef CONFIG_PARTITION_MODE
void partition_mode_dispatch_interrupt(struct intr_excp_ctx *ctx)
{
uint8_t vr = ctx->vector;
struct vcpu *vcpu;
/*
* There is no vector and APIC ID remapping for VMs in
* ACRN partition mode. Device interrupts are injected with the same
* vector into vLAPIC of vCPU running on the pCPU. Vectors used for
* HV services are handled by HV using dispatch_interrupt.
*/
vcpu = per_cpu(vcpu, get_cpu_id());
if (vr < VECTOR_FOR_PRI_START) {
send_lapic_eoi();
vlapic_intr_edge(vcpu, vr);
} else {
dispatch_interrupt(ctx);
}
}
#endif
int handle_level_interrupt_common(struct irq_desc *desc,
__unused void *handler_data)
{

4
hypervisor/arch/x86/virq.c
View File

@ -373,7 +373,11 @@ int external_interrupt_vmexit_handler(struct vcpu *vcpu)
ctx.vector = intr_info & 0xFFU;
#ifdef CONFIG_PARTITION_MODE
partition_mode_dispatch_interrupt(&ctx);
#else
dispatch_interrupt(&ctx);
#endif
vcpu_retain_rip(vcpu);

3
hypervisor/include/arch/x86/irq.h
View File

@ -55,6 +55,9 @@ void init_default_irqs(uint16_t cpu_id);
void dispatch_exception(struct intr_excp_ctx *ctx);
void dispatch_interrupt(struct intr_excp_ctx *ctx);
#ifdef CONFIG_PARTITION_MODE
void partition_mode_dispatch_interrupt(struct intr_excp_ctx *ctx);
#endif
void setup_notification(void);