lguest: per-vcpu lguest timers

Here, I introduce per-vcpu timers. With this, we can have
local expiries, needed for accounting time in smp guests

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

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c
index 2562082a3ea3..f231b9be0b64 100644
--- a/drivers/lguest/lguest_user.c
+++ b/drivers/lguest/lguest_user.c
@@ -104,6 +104,7 @@ static int lg_cpu_start(struct lg_cpu *cpu, unsigned id, unsigned long start_ip)
         cpu->id = id;
         cpu->lg = container_of((cpu - id), struct lguest, cpus[0]);
         cpu->lg->nr_cpus++;
+        init_clockdev(cpu);
 
         return 0;
 }
@@ -180,9 +181,6 @@ static int initialize(struct file *file, const unsigned long __user *input)
          * address. */
         lguest_arch_setup_regs(lg, args[3]);
 
-        /* The timer for lguest's clock needs initialization. */
-        init_clockdev(lg);
-
         /* We keep a pointer to the Launcher task (ie. current task) for when
          * other Guests want to wake this one (inter-Guest I/O). */
         lg->tsk = current;
@@ -273,6 +271,7 @@ static ssize_t write(struct file *file, const char __user *in,
 static int close(struct inode *inode, struct file *file)
 {
         struct lguest *lg = file->private_data;
+        unsigned int i;
 
         /* If we never successfully initialized, there's nothing to clean up */
         if (!lg)
@@ -281,8 +280,9 @@ static int close(struct inode *inode, struct file *file)
         /* We need the big lock, to protect from inter-guest I/O and other
          * Launchers initializing guests. */
         mutex_lock(&lguest_lock);
-        /* Cancels the hrtimer set via LHCALL_SET_CLOCKEVENT. */
-        hrtimer_cancel(&lg->hrt);
+        for (i = 0; i < lg->nr_cpus; i++)
+                /* Cancels the hrtimer set via LHCALL_SET_CLOCKEVENT. */
+                hrtimer_cancel(&lg->cpus[i].hrt);
         /* Free up the shadow page tables for the Guest. */
         free_guest_pagetable(lg);
         /* Now all the memory cleanups are done, it's safe to release the