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authorSean Christopherson <sean.j.christopherson@intel.com>2019-02-05 13:01:23 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2019-02-20 22:48:40 +0100
commit4771450c345dc5e3e3417d82aff62e0d88e7eee6 (patch)
tree17507abb7aa2f6a9d65195715fede2c54a3fd692 /arch/x86/include/asm
parenta592a3b8fc62af25a6e76aebde97a5d5f6f13e0f (diff)
downloadlinux-0-day-4771450c345dc5e3e3417d82aff62e0d88e7eee6.tar.gz
linux-0-day-4771450c345dc5e3e3417d82aff62e0d88e7eee6.tar.xz
Revert "KVM: MMU: drop kvm_mmu_zap_mmio_sptes"
Revert back to a dedicated (and slower) mechanism for handling the scenario where all MMIO shadow PTEs need to be zapped due to overflowing the MMIO generation number. The MMIO generation scenario is almost literally a one-in-a-million occurrence, i.e. is not a performance sensitive scenario. Restoring kvm_mmu_zap_mmio_sptes() leaves VM teardown as the only user of kvm_mmu_invalidate_zap_all_pages() and paves the way for removing the fast invalidate mechanism altogether. This reverts commit a8eca9dcc656a405a28ffba43f3d86a1ff0eb331. Cc: Xiao Guangrong <guangrong.xiao@gmail.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r--arch/x86/include/asm/kvm_host.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 69daa57b08a7..aeca3fb1cf63 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -319,6 +319,7 @@ struct kvm_mmu_page {
struct list_head link;
struct hlist_node hash_link;
bool unsync;
+ bool mmio_cached;
/*
* The following two entries are used to key the shadow page in the