[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 6/6] xen/arm: disable a physical IRQ when the guest disables the corresponding IRQ
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Changes in v2: - disable IRQs that were previously disabled. --- xen/arch/arm/vgic.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c index c35661e..30a413f 100644 --- a/xen/arch/arm/vgic.c +++ b/xen/arch/arm/vgic.c @@ -360,6 +360,22 @@ read_as_zero: return 1; } +static void vgic_disable_irqs(struct vcpu *v, uint32_t r, int n) +{ + struct pending_irq *p; + unsigned int irq; + int i = 0; + + while ( (i = find_next_bit((const long unsigned int *) &r, 32, i)) < 32 ) { + irq = i + (32 * n); + p = irq_to_pending(v, irq); + clear_bit(_GIC_IRQ_GUEST_ENABLED, &p->status); + if ( p->desc != NULL ) + p->desc->handler->disable(p->desc); + i++; + } +} + static void vgic_enable_irqs(struct vcpu *v, uint32_t r, int n) { struct pending_irq *p; @@ -490,8 +506,10 @@ static int vgic_distr_mmio_write(struct vcpu *v, mmio_info_t *info) rank = vgic_irq_rank(v, 1, gicd_reg - GICD_ICENABLER); if ( rank == NULL) goto write_ignore; vgic_lock_rank(v, rank); + tr = rank->ienable; rank->ienable &= ~*r; vgic_unlock_rank(v, rank); + vgic_disable_irqs(v, (*r) & tr, gicd_reg - GICD_ICENABLER); return 1; case GICD_ISPENDR ... GICD_ISPENDRN: -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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