[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC v1 12/15] vmx: Properly handle notification event when vCPU is running
When a vCPU is running in Root mode and a notification event has been injected to it. we need to set VCPU_KICK_SOFTIRQ for the current cpu, so the pending interrupt in PIRR will be synced to vIRR before VM-Exit in time. Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx> --- xen/arch/x86/hvm/vmx/vmx.c | 24 +++++++++++++++++++++++- xen/include/asm-x86/hvm/vmx/vmx.h | 1 + 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index b2b4c26..b30392c 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -1838,7 +1838,7 @@ const struct hvm_function_table * __init start_vmx(void) if ( cpu_has_vmx_posted_intr_processing ) { - alloc_direct_apic_vector(&posted_intr_vector, event_check_interrupt); + alloc_direct_apic_vector(&posted_intr_vector, pi_notification_interrupt); if ( iommu_intpost ) alloc_direct_apic_vector(&pi_wakeup_vector, pi_wakeup_interrupt); @@ -3288,6 +3288,28 @@ void pi_wakeup_interrupt(struct cpu_user_regs *regs) } /* + * Handle VT-d posted-interrupt when VCPU is running. + */ + +void pi_notification_interrupt(struct cpu_user_regs *regs) +{ + /* + * We get here because a vCPU is running in Root mode + * and a notification event has been injected to it. + * + * we need to set VCPU_KICK_SOFTIRQ for the current + * cpu, just like __vmx_deliver_posted_interrupt(). + * + * So the pending interrupt in PIRR will be synced to + * vIRR before VM-Exit in time. + */ + set_bit(VCPU_KICK_SOFTIRQ, &softirq_pending(smp_processor_id())); + + ack_APIC_irq(); + this_cpu(irq_count)++; +} + +/* * Local variables: * mode: C * c-file-style: "BSD" diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h b/xen/include/asm-x86/hvm/vmx/vmx.h index f4296ab..e53275b 100644 --- a/xen/include/asm-x86/hvm/vmx/vmx.h +++ b/xen/include/asm-x86/hvm/vmx/vmx.h @@ -576,6 +576,7 @@ void free_p2m_hap_data(struct p2m_domain *p2m); void p2m_init_hap_data(struct p2m_domain *p2m); void pi_wakeup_interrupt(struct cpu_user_regs *regs); +void pi_notification_interrupt(struct cpu_user_regs *regs); /* EPT violation qualifications definitions */ #define _EPT_READ_VIOLATION 0 -- 2.1.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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