[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 55/62] arm/acpi: Route all Xen unused SPIs to Dom0
From: Shannon Zhao <shannon.zhao@xxxxxxxxxx> Route all SPIs to Dom0 except the interrupts that Xen uses. Since Xen already uses the uart interrupt, the desc->action will not be NULL, so it will skip it. Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> --- xen/arch/arm/domain_build.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 6d8536b..6945f89 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1360,6 +1360,35 @@ static int prepare_dtb(struct domain *d, struct kernel_info *kinfo) #define XEN_HYPERVISOR_ID 0x000058656E564D4D /* "XenVMM" */ #define ACPI_DOM0_FDT_MIN_SIZE 4096 +static int acpi_route_spi(struct domain *d) +{ + int i, res; + struct irq_desc *desc; + + /* Don't route Xen used interrupt to Dom0. Since Xen already uses the uart + * interrupt, the desc->action will not be NULL, so it will skip it. + */ + for( i = NR_LOCAL_IRQS; i < vgic_num_irqs(d); i++ ) + { + /* Don't route uart interrupt to Dom0 */ + desc = irq_to_desc(i); + if( desc->action != NULL) + continue; + + vgic_reserve_virq(d, i); + irq_set_type(i, ACPI_IRQ_TYPE_NONE); + res = route_irq_to_guest(d, i, i, NULL); + if ( res ) + { + printk(XENLOG_ERR "Unable to route IRQ %u to domain %u\n", + i, d->domain_id); + continue; + } + } + + return 0; +} + static int make_chosen_node(const struct kernel_info *kinfo, struct membank tbl_add[]) { @@ -1897,6 +1926,10 @@ static int prepare_acpi(struct domain *d, struct kernel_info *kinfo) if ( rc != 0 ) return rc; + rc = acpi_route_spi(d); + if ( rc != 0 ) + return rc; + return 0; } #else -- 2.1.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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