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    SubjectRe: [PATCH 14/24] xen/arm: initialize grant_table on ARM
    On Thu, Jul 26, 2012 at 04:33:56PM +0100, Stefano Stabellini wrote:
    > Initialize the grant table mapping at the address specified at index 0
    > in the DT under the /xen node.

    Is it always index 0? If so, should it have a #define for the
    other index values?

    > After the grant table is initialized, call xenbus_probe (if not dom0).
    >
    > Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
    > ---
    > arch/arm/xen/enlighten.c | 13 +++++++++++++
    > drivers/xen/grant-table.c | 2 +-
    > 2 files changed, 14 insertions(+), 1 deletions(-)
    >
    > diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
    > index 2e013cf..854af1e 100644
    > --- a/arch/arm/xen/enlighten.c
    > +++ b/arch/arm/xen/enlighten.c
    > @@ -1,8 +1,12 @@
    > #include <xen/xen.h>
    > #include <xen/interface/xen.h>
    > #include <xen/interface/memory.h>
    > +#include <xen/interface/hvm/params.h>
    > #include <xen/platform_pci.h>
    > #include <xen/features.h>
    > +#include <xen/grant_table.h>
    > +#include <xen/hvm.h>
    > +#include <xen/xenbus.h>
    > #include <asm/xen/hypervisor.h>
    > #include <asm/xen/hypercall.h>
    > #include <linux/module.h>
    > @@ -51,12 +55,16 @@ int __init xen_guest_init(void)
    > struct xen_add_to_physmap xatp;
    > static struct shared_info *shared_info_page = 0;
    > struct device_node *node;
    > + struct resource res;
    >
    > node = of_find_compatible_node(NULL, NULL, "arm,xen");
    > if (!node) {
    > pr_info("No Xen support\n");
    > return 0;
    > }
    > + if (of_address_to_resource(node, 0, &res))
    > + return -EINVAL;
    > + xen_hvm_resume_frames = res.start >> PAGE_SHIFT;
    > xen_domain_type = XEN_HVM_DOMAIN;
    >
    > xen_setup_features();
    > @@ -97,6 +105,11 @@ int __init xen_guest_init(void)
    > per_cpu(xen_vcpu, cpu) =
    > &HYPERVISOR_shared_info->vcpu_info[cpu];
    > }
    > +
    > + gnttab_init();
    > + if (!xen_initial_domain())
    > + xenbus_probe(NULL);
    > +
    > return 0;
    > }
    > EXPORT_SYMBOL_GPL(xen_guest_init);
    > diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
    > index 1d0d95e..fd2137a 100644
    > --- a/drivers/xen/grant-table.c
    > +++ b/drivers/xen/grant-table.c
    > @@ -62,7 +62,7 @@
    >
    > static grant_ref_t **gnttab_list;
    > static unsigned int nr_grant_frames;
    > -static unsigned int boot_max_nr_grant_frames;
    > +static unsigned int boot_max_nr_grant_frames = 1;

    Is this going to impact x86 version?

    > static int gnttab_free_count;
    > static grant_ref_t gnttab_free_head;
    > static DEFINE_SPINLOCK(gnttab_list_lock);
    > --
    > 1.7.2.5


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