[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 2/5] xen/arm: SMP support
Map vcpu_info using VCPUOP_register_vcpu_info on secondary cpus. Call enable_percpu_irq on every cpu. Changed in v2: - move the percpu variable argument fix to a separate patch; - remove unused variable. Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> --- arch/arm/xen/enlighten.c | 38 +++++++++++++++++++++++++++++++++++++- 1 files changed, 37 insertions(+), 1 deletions(-) diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 99ce189..94bbf3b 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -2,6 +2,7 @@ #include <xen/events.h> #include <xen/grant_table.h> #include <xen/hvm.h> +#include <xen/interface/vcpu.h> #include <xen/interface/xen.h> #include <xen/interface/memory.h> #include <xen/interface/hvm/params.h> @@ -32,6 +33,7 @@ struct shared_info xen_dummy_shared_info; struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info; DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); +DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info); /* These are unused until we support booting "pre-ballooned" */ unsigned long xen_released_pages; @@ -148,6 +150,32 @@ int xen_unmap_domain_mfn_range(struct vm_area_struct *vma, } EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range); +static int __init xen_secondary_init(unsigned int cpu) +{ + struct vcpu_register_vcpu_info info; + struct vcpu_info *vcpup; + int err; + + if (cpu == 0) + return 0; + + pr_info("Xen: initializing cpu%d\n", cpu); + vcpup = &per_cpu(xen_vcpu_info, cpu); + + info.mfn = __pa(vcpup) >> PAGE_SHIFT; + info.offset = offset_in_page(vcpup); + + err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info); + if (err) { + pr_debug("register_vcpu_info failed: err=%d\n", err); + } else { + /* This cpu is using the registered vcpu info, even if + later ones fail to. */ + per_cpu(xen_vcpu, cpu) = vcpup; + } + return 0; +} + /* * see Documentation/devicetree/bindings/arm/xen.txt for the * documentation of the Xen Device Tree format. @@ -163,6 +191,7 @@ static int __init xen_guest_init(void) const char *version = NULL; const char *xen_prefix = "xen,xen-"; struct resource res; + int i; node = of_find_compatible_node(NULL, NULL, "xen,xen"); if (!node) { @@ -216,6 +245,8 @@ static int __init xen_guest_init(void) * is required to use VCPUOP_register_vcpu_info to place vcpu info * for secondary CPUs as they are brought up. */ per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0]; + for_each_online_cpu(i) + xen_secondary_init(i); gnttab_init(); if (!xen_initial_domain()) @@ -231,6 +262,11 @@ static irqreturn_t xen_arm_callback(int irq, void *arg) return IRQ_HANDLED; } +static __init void xen_percpu_enable_events(void *unused) +{ + enable_percpu_irq(xen_events_irq, 0); +} + static int __init xen_init_events(void) { if (!xen_domain() || xen_events_irq < 0) @@ -244,7 +280,7 @@ static int __init xen_init_events(void) return -EINVAL; } - enable_percpu_irq(xen_events_irq, 0); + on_each_cpu(xen_percpu_enable_events, NULL, 0); return 0; } -- 1.7.2.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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