* xen/arm: more info on the ARM ABI
@ 2013-11-07 14:52 Stefano Stabellini
2013-11-11 16:24 ` Ian Campbell
0 siblings, 1 reply; 2+ messages in thread
From: Stefano Stabellini @ 2013-11-07 14:52 UTC (permalink / raw)
To: xen-devel; +Cc: Ian Campbell, Stefano Stabellini
Add more information about the exported ARM ABI.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 5d359af..1e8aeda 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -120,6 +120,40 @@
* Exactly these sub-operations are supported:
* * VCPUOP_register_vcpu_info
* * VCPUOP_register_runstate_memory_area
+ *
+ *
+ * Other notes on the ARM ABI:
+ *
+ * - struct start_info is not exported to ARM guests.
+ *
+ * - struct shared_info is mapped by ARM guests using the
+ * HYPERVISOR_memory_op sub-op XENMEM_add_to_physmap, passing
+ * XENMAPSPACE_shared_info as space parameter.
+ *
+ * - All the per-cpu struct vcpu_info are mapped by ARM guests using the
+ * HYPERVISOR_vcpu_op sub-op VCPUOP_register_vcpu_info, including cpu0
+ * struct vcpu_info.
+ *
+ * - The grant table is mapped using the HYPERVISOR_memory_op sub-op
+ * XENMEM_add_to_physmap, passing XENMAPSPACE_grant_table as space
+ * parameter. The memory range specified under the Xen compatible
+ * hypervisor node on device tree can be used as target gpfn for the
+ * mapping.
+ *
+ * - Xenstore is initialized by using the two hvm_params
+ * HVM_PARAM_STORE_PFN and HVM_PARAM_STORE_EVTCHN. They can be read
+ * with the HYPERVISOR_hvm_op sub-op HVMOP_get_param.
+ *
+ * - The paravirtualized console is initialized by using the two
+ * hvm_params HVM_PARAM_CONSOLE_PFN and HVM_PARAM_CONSOLE_EVTCHN. They
+ * can be read with the HYPERVISOR_hvm_op sub-op HVMOP_get_param.
+ *
+ * - Event channel notifications are delivered using the percpu GIC
+ * interrupt specified under the Xen compatible hypervisor node on
+ * device tree.
+ *
+ * - The device tree Xen compatible node is fully described under Linux
+ * at Documentation/devicetree/bindings/arm/xen.txt.
*/
#define XEN_HYPERCALL_TAG 0XEA1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: xen/arm: more info on the ARM ABI
2013-11-07 14:52 xen/arm: more info on the ARM ABI Stefano Stabellini
@ 2013-11-11 16:24 ` Ian Campbell
0 siblings, 0 replies; 2+ messages in thread
From: Ian Campbell @ 2013-11-11 16:24 UTC (permalink / raw)
To: Stefano Stabellini; +Cc: xen-devel
On Thu, 2013-11-07 at 14:52 +0000, Stefano Stabellini wrote:
> Add more information about the exported ARM ABI.
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked + applied. thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-11-07 14:52 xen/arm: more info on the ARM ABI Stefano Stabellini
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