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| author | Avi Kivity <avi@qumranet.com> | 2007-11-25 14:04:58 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-01-30 17:53:18 +0200 |
| commit | c3c91fee5195ba5176a6da5ddc2a2822243eb79f (patch) | |
| tree | 1fcccd77e5705d5f885bbb24ecb08bd93cf71c63 /drivers/kvm/x86.c | |
| parent | 298101da2f507c13eaf179ee4507a7c0fe3e7b06 (diff) | |
| download | lwn-c3c91fee5195ba5176a6da5ddc2a2822243eb79f.tar.gz lwn-c3c91fee5195ba5176a6da5ddc2a2822243eb79f.zip | |
KVM: Replace page fault injection by the generalized exception queue
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/x86.c')
| -rw-r--r-- | drivers/kvm/x86.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c index 11440d12a2d3..dc007a32a883 100644 --- a/drivers/kvm/x86.c +++ b/drivers/kvm/x86.c @@ -142,6 +142,21 @@ void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) } EXPORT_SYMBOL_GPL(kvm_queue_exception); +void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, + u32 error_code) +{ + ++vcpu->stat.pf_guest; + if (vcpu->exception.pending && vcpu->exception.nr == PF_VECTOR) { + printk(KERN_DEBUG "kvm: inject_page_fault:" + " double fault 0x%lx\n", addr); + vcpu->exception.nr = DF_VECTOR; + vcpu->exception.error_code = 0; + return; + } + vcpu->cr2 = addr; + kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); +} + void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) { WARN_ON(vcpu->exception.pending); @@ -1601,7 +1616,7 @@ static int emulator_write_emulated_onepage(unsigned long addr, gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); if (gpa == UNMAPPED_GVA) { - kvm_x86_ops->inject_page_fault(vcpu, addr, 2); + kvm_inject_page_fault(vcpu, addr, 2); return X86EMUL_PROPAGATE_FAULT; } |