Resurrect a 6 month old patch from Mingwei, add a few cleanps on top, and fix a largely theoretical race between emulating writes and write-protecting shadow pages. At least, I'm pretty sure there's a race. Memory ordering isn't exactly my strong suit. v2: - Drop the unnecessary READ_ONCE(). [Jim] - Cleanup more old crud in reexecute_instruction(). - Fix the aforementioned race. v1: https://lore.kernel.org/all/20230605004334.1930091-1-mizhang@xxxxxxxxxx Mingwei Zhang (1): KVM: x86/mmu: Don't acquire mmu_lock when using indirect_shadow_pages as a heuristic Sean Christopherson (3): KVM: x86: Drop dedicated logic for direct MMUs in reexecute_instruction() KVM: x86: Drop superfluous check on direct MMU vs. WRITE_PF_TO_SP flag KVM: x86/mmu: Fix a *very* theoretical race in kvm_mmu_track_write() arch/x86/kvm/mmu/mmu.c | 19 ++++++++++++++++--- arch/x86/kvm/x86.c | 35 ++++++++++++++--------------------- 2 files changed, 30 insertions(+), 24 deletions(-) base-commit: 60eedcfceda9db46f1b333e5e1aa9359793f04fb -- 2.43.0.594.gd9cf4e227d-goog
