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authorAvi Kivity <avi@qumranet.com>2007-01-05 16:36:54 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2007-01-05 23:55:27 -0800
commite2dec939db126989808853d218e426daaeebc9e2 (patch)
tree5c742e609e43090df396fc1c7a6b4c526099dbea /drivers/kvm/svm.c
parent714b93da1a6d97307dfafb9915517879d8a66c0d (diff)
[PATCH] KVM: MMU: Detect oom conditions and propagate error to userspace
Signed-off-by: Avi Kivity <avi@qumranet.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/kvm/svm.c')
-rw-r--r--drivers/kvm/svm.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 99250011a47..af1e7b3f917 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -852,6 +852,7 @@ static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
u64 fault_address;
u32 error_code;
enum emulation_result er;
+ int r;
if (is_external_interrupt(exit_int_info))
push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
@@ -860,7 +861,12 @@ static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
fault_address = vcpu->svm->vmcb->control.exit_info_2;
error_code = vcpu->svm->vmcb->control.exit_info_1;
- if (!kvm_mmu_page_fault(vcpu, fault_address, error_code)) {
+ r = kvm_mmu_page_fault(vcpu, fault_address, error_code);
+ if (r < 0) {
+ spin_unlock(&vcpu->kvm->lock);
+ return r;
+ }
+ if (!r) {
spin_unlock(&vcpu->kvm->lock);
return 1;
}
@@ -1398,6 +1404,7 @@ static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
u16 fs_selector;
u16 gs_selector;
u16 ldt_selector;
+ int r;
again:
do_interrupt_requests(vcpu, kvm_run);
@@ -1565,7 +1572,8 @@ again:
return 0;
}
- if (handle_exit(vcpu, kvm_run)) {
+ r = handle_exit(vcpu, kvm_run);
+ if (r > 0) {
if (signal_pending(current)) {
++kvm_stat.signal_exits;
post_kvm_run_save(vcpu, kvm_run);
@@ -1581,7 +1589,7 @@ again:
goto again;
}
post_kvm_run_save(vcpu, kvm_run);
- return 0;
+ return r;
}
static void svm_flush_tlb(struct kvm_vcpu *vcpu)