[Xen-changelog] [xen staging] xen/arm: implement construct_domU

[p***@xen.org]

commit 7aeb6335460d3e141c2f77769679293cbbcb5c4e
Author: Stefano Stabellini <***@kernel.org>
AuthorDate: Tue Nov 13 09:49:32 2018 -0800
Commit: Julien Grall <***@arm.com>
CommitDate: Wed Nov 14 19:34:48 2018 +0000

xen/arm: implement construct_domU

Similar to construct_dom0, construct_domU creates a barebone DomU guest.

The device tree node passed as argument is compatible "xen,domain", see
docs/misc/arm/device-tree/booting.txt.

Remove #if 0 from allocate_memory as this patch will start using it.

Signed-off-by: Stefano Stabellini <***@xilinx.com>
Acked-by: Julien Grall <***@arm.com>
---
xen/arch/arm/domain_build.c | 35 ++++++++++++++++++++++++++++++++---
1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 8ae15481ec..cf84de9971 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -4,6 +4,7 @@
#include <xen/mm.h>
#include <xen/domain_page.h>
#include <xen/sched.h>
+#include <xen/sizes.h>
#include <asm/irq.h>
#include <asm/regs.h>
#include <xen/errno.h>
@@ -369,7 +370,6 @@ static void __init allocate_memory_11(struct domain *d,
}
}

-#if 0
static bool __init allocate_bank_memory(struct domain *d,
struct kernel_info *kinfo,
gfn_t sgfn,
@@ -468,7 +468,6 @@ fail:
" %ldKB unallocated. Fix the VMs configurations.\n",
(unsigned long)kinfo->unassigned_mem >> 10);
}
-#endif

static int __init write_properties(struct domain *d, struct kernel_info *kinfo,
const struct dt_device_node *node)
@@ -2310,7 +2309,37 @@ static int __init construct_domain(struct domain *d, struct kernel_info *kinfo)
static int __init construct_domU(struct domain *d,
const struct dt_device_node *node)
{
- return -ENOSYS;
+ struct kernel_info kinfo = {};
+ int rc;
+ u64 mem;
+
+ rc = dt_property_read_u64(node, "memory", &mem);
+ if ( !rc )
+ {
+ printk("Error building DomU: cannot read \"memory\" property\n");
+ return -EINVAL;
+ }
+ kinfo.unassigned_mem = (paddr_t)mem * SZ_1K;
+
+ printk("*** LOADING DOMU cpus=%u memory=%"PRIx64"KB ***\n", d->max_vcpus, mem);
+
+ if ( vcpu_create(d, 0, 0) == NULL )
+ return -ENOMEM;
+ d->max_pages = ~0U;
+
+ kinfo.d = d;
+
+ rc = kernel_probe(&kinfo, node);
+ if ( rc < 0 )
+ return rc;
+
+#ifdef CONFIG_ARM_64
+ /* type must be set before allocate memory */
+ d->arch.type = kinfo.type;
+#endif
+ allocate_memory(d, &kinfo);
+
+ return construct_domain(d, &kinfo);
}

void __init create_domUs(void)
--
generated by git-patchbot for /home/xen/git/xen.git#staging