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Diffstat (limited to 'arch/x86/kernel/kvm.c')
-rw-r--r--arch/x86/kernel/kvm.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 08b973f..9c2bd8b 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -43,6 +43,7 @@
#include <asm/apicdef.h>
#include <asm/hypervisor.h>
#include <asm/kvm_guest.h>
+#include <asm/context_tracking.h>
static int kvmapf = 1;
@@ -121,6 +122,8 @@ void kvm_async_pf_task_wait(u32 token)
struct kvm_task_sleep_node n, *e;
DEFINE_WAIT(wait);
+ rcu_irq_enter();
+
spin_lock(&b->lock);
e = _find_apf_task(b, token);
if (e) {
@@ -128,6 +131,8 @@ void kvm_async_pf_task_wait(u32 token)
hlist_del(&e->link);
kfree(e);
spin_unlock(&b->lock);
+
+ rcu_irq_exit();
return;
}
@@ -152,13 +157,16 @@ void kvm_async_pf_task_wait(u32 token)
/*
* We cannot reschedule. So halt.
*/
+ rcu_irq_exit();
native_safe_halt();
+ rcu_irq_enter();
local_irq_disable();
}
}
if (!n.halted)
finish_wait(&n.wq, &wait);
+ rcu_irq_exit();
return;
}
EXPORT_SYMBOL_GPL(kvm_async_pf_task_wait);
@@ -252,10 +260,10 @@ do_async_page_fault(struct pt_regs *regs, unsigned long error_code)
break;
case KVM_PV_REASON_PAGE_NOT_PRESENT:
/* page is swapped out by the host. */
- rcu_irq_enter();
+ exception_enter(regs);
exit_idle();
kvm_async_pf_task_wait((u32)read_cr2());
- rcu_irq_exit();
+ exception_exit(regs);
break;
case KVM_PV_REASON_PAGE_READY:
rcu_irq_enter();
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