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SubjectRe: [PATCH v4 14/24] xen/arm: initialize grant_table on ARM
On Fri, Sep 14, 2012 at 12:13:16PM +0100, Stefano Stabellini wrote:
> Initialize the grant table mapping at the address specified at index 0
> in the DT under the /xen node.
> After the grant table is initialized, call xenbus_probe (if not dom0).

So we don't really care about the grant's size then? The DT xen.txt
talks about it..
>
> Changes in v2:
>
> - introduce GRANT_TABLE_PHYSADDR;
> - remove unneeded initialization of boot_max_nr_grant_frames.
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> ---
> arch/arm/xen/enlighten.c | 14 ++++++++++++++
> 1 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
> index c2a47a7..036a4d8 100644
> --- a/arch/arm/xen/enlighten.c
> +++ b/arch/arm/xen/enlighten.c
> @@ -1,8 +1,12 @@
> #include <xen/xen.h>
> +#include <xen/grant_table.h>
> +#include <xen/hvm.h>
> #include <xen/interface/xen.h>
> #include <xen/interface/memory.h>
> +#include <xen/interface/hvm/params.h>
> #include <xen/features.h>
> #include <xen/platform_pci.h>
> +#include <xen/xenbus.h>
> #include <asm/xen/hypervisor.h>
> #include <asm/xen/hypercall.h>
> #include <linux/module.h>
> @@ -42,6 +46,7 @@ EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);
> * see Documentation/devicetree/bindings/arm/xen.txt for the
> * documentation of the Xen Device Tree format.
> */
> +#define GRANT_TABLE_PHYSADDR 0
> static int __init xen_guest_init(void)
> {
> struct xen_add_to_physmap xatp;
> @@ -51,6 +56,7 @@ static int __init xen_guest_init(void)
> const char *s = NULL;
> const char *version = NULL;
> const char *xen_prefix = "xen,xen-";
> + struct resource res;
>
> node = of_find_compatible_node(NULL, NULL, "xen,xen");
> if (!node) {
> @@ -65,6 +71,9 @@ static int __init xen_guest_init(void)
> pr_debug("Xen version not found\n");
> return 0;
> }
> + if (of_address_to_resource(node, GRANT_TABLE_PHYSADDR, &res))
> + return 0;
> + xen_hvm_resume_frames = res.start >> PAGE_SHIFT;
> xen_domain_type = XEN_HVM_DOMAIN;
>
> xen_setup_features();
> @@ -98,6 +107,11 @@ 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];
> +
> + gnttab_init();
> + if (!xen_initial_domain())
> + xenbus_probe(NULL);
> +
> return 0;
> }
> core_initcall(xen_guest_init);
> --
> 1.7.2.5


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