Currently when we emulate a locked operation into a shadowed guest page table, we perform a write rather than a true atomic. This is indicated by the "emulating exchange as write" message that shows up in dmesg. In addition, the pte prefetch operation during invlpg suffered from a race. This was fixed by removing the operation. This patchset fixes both issues and reinstates pte prefetch on invlpg. v2: - fix truncated description for patch 1 - add new patch 4, which fixes a bug in patch 5 Avi Kivity (5): KVM: MMU: Consolidate two guest pte reads in kvm_mmu_pte_write() KVM: Make locked operations truly atomic KVM: Don't follow an atomic operation by a non-atomic one KVM: MMU: Do not instantiate nontrapping spte on unsync page KVM: MMU: Reinstate pte prefetch on invlpg arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/mmu.c | 78 +++++++++++++++--------------- arch/x86/kvm/paging_tmpl.h | 25 +++++++++- arch/x86/kvm/x86.c | 101 ++++++++++++++++++++++++++++----------- 4 files changed, 137 insertions(+), 68 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
