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linux-sg2042
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Merge commit 'origin/master' into kvm-ppc-3.8

This commit is contained in:
Alexander Graf 2013-01-06 14:02:03 +01:00
parent d591390da9 18eb54cf4a
commit d686a54763
1 changed files with 10 additions and 2 deletions
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12
arch/x86/kernel/kvm.c
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@ -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();