lguest: initialize vcpu

this patch initializes the first vcpu in the initialize() routing,
which is responsible for starting the process of putting the guest up.
right now, as much of the fields are still not per-vcpu, it does not
do much.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c
index 3b92a61ba8d23b14e1ac8e5b342929a314b669be..c4bfe5a2b6b7d320985dab2f9e99de217313ed2b 100644 (file)
--- a/drivers/lguest/lguest_user.c
+++ b/drivers/lguest/lguest_user.c
@@ -88,6 +88,18 @@ static ssize_t read(struct file *file, char __user *user, size_t size,loff_t*o)
        return run_guest(lg, (unsigned long __user *)user);
 }
 
+static int lg_cpu_start(struct lg_cpu *cpu, unsigned id, unsigned long start_ip)
+{
+       if (id >= NR_CPUS)
+               return -EINVAL;
+
+       cpu->id = id;
+       cpu->lg = container_of((cpu - id), struct lguest, cpus[0]);
+       cpu->lg->nr_cpus++;
+
+       return 0;
+}
+
 /*L:020 The initialization write supplies 4 pointer sized (32 or 64 bit)
  * values (in addition to the LHREQ_INITIALIZE value).  These are:
  *
@@ -134,6 +146,11 @@ static int initialize(struct file *file, const unsigned long __user *input)
        lg->mem_base = (void __user *)(long)args[0];
        lg->pfn_limit = args[1];
 
+       /* This is the first cpu */
+       err = cpu_start(&lg->cpus[0], 0, args[3]);
+       if (err)
+               goto release_guest;
+
        /* We need a complete page for the Guest registers: they are accessible
         * to the Guest and we can only grant it access to whole pages. */
        lg->regs_page = get_zeroed_page(GFP_KERNEL);