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Diffstat (limited to 'drivers/lguest/core.c')
-rw-r--r--drivers/lguest/core.c29
1 files changed, 14 insertions, 15 deletions
diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c
index 6590558d1d31..7dc93aa004c8 100644
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -208,6 +208,14 @@ void __lgwrite(struct lg_cpu *cpu, unsigned long addr, const void *b,
*/
int run_guest(struct lg_cpu *cpu, unsigned long __user *user)
{
+ /* If the launcher asked for a register with LHREQ_GETREG */
+ if (cpu->reg_read) {
+ if (put_user(*cpu->reg_read, user))
+ return -EFAULT;
+ cpu->reg_read = NULL;
+ return sizeof(*cpu->reg_read);
+ }
+
/* We stop running once the Guest is dead. */
while (!cpu->lg->dead) {
unsigned int irq;
@@ -217,21 +225,12 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user)
if (cpu->hcall)
do_hypercalls(cpu);
- /*
- * It's possible the Guest did a NOTIFY hypercall to the
- * Launcher.
- */
- if (cpu->pending_notify) {
- /*
- * Does it just needs to write to a registered
- * eventfd (ie. the appropriate virtqueue thread)?
- */
- if (!send_notify_to_eventfd(cpu)) {
- /* OK, we tell the main Launcher. */
- if (put_user(cpu->pending_notify, user))
- return -EFAULT;
- return sizeof(cpu->pending_notify);
- }
+ /* Do we have to tell the Launcher about a trap? */
+ if (cpu->pending.trap) {
+ if (copy_to_user(user, &cpu->pending,
+ sizeof(cpu->pending)))
+ return -EFAULT;
+ return sizeof(cpu->pending);
}
/*