Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fix from Paolo Bonzini:
"This single patch fixes a regression caused by one of the
optimizations introduced in 3.11, which is generally visible only on
AMD processors"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: MMU: avoid fast page fault fixing mmio page fault
+7
+7
arch/x86/kvm/mmu.c
+7
arch/x86/kvm/mmu.c
···
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static bool page_fault_can_be_fast(struct kvm_vcpu *vcpu, u32 error_code)
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{
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/*
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* Do not fix the mmio spte with invalid generation number which
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* need to be updated by slow page fault path.
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+
*/
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+
if (unlikely(error_code & PFERR_RSVD_MASK))
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return false;
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+
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+
/*
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* #PF can be fast only if the shadow page table is present and it
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* is caused by write-protect, that means we just need change the
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* W bit of the spte which can be done out of mmu-lock.