From: Lai Jiangshan <jiangshan.ljs@xxxxxxxxxxxx> Current code uses mmu->pae_root, mmu->pml4_root, and mmu->pml5_root to setup special roots. The initialization code is complex and the roots are not associated with struct kvm_mmu_page which causes the code more complex. So add new special shadow pages to simplify it. The special shadow pages are associated with struct kvm_mmu_page and VCPU-local. The special shadow pages are created and freed when the roots are changed (or one-off) which can be optimized but not in the patchset since the re-creating is light way (in normal case only the struct kvm_mmu_page needs to be re-allocated and sp->spt doens't, because it is likely to be mmu->pae_root) Changed from v1: Rebase to newest kvm/queue. Slightly update patch4. [V1]: https://lore.kernel.org/lkml/20220420132605.3813-1-jiangshanlai@xxxxxxxxx/ Lai Jiangshan (7): KVM: X86/MMU: Add using_special_root_page() KVM: X86/MMU: Add special shadow pages KVM: X86/MMU: Link PAE root pagetable with its children KVM: X86/MMU: Activate special shadow pages and remove old logic KVM: X86/MMU: Remove the check of the return value of to_shadow_page() KVM: X86/MMU: Allocate mmu->pae_root for PAE paging on-demand KVM: X86/MMU: Remove mmu_alloc_special_roots() arch/x86/include/asm/kvm_host.h | 3 - arch/x86/kvm/mmu/mmu.c | 487 ++++++++++---------------------- arch/x86/kvm/mmu/mmu_internal.h | 10 - arch/x86/kvm/mmu/paging_tmpl.h | 14 +- arch/x86/kvm/mmu/spte.c | 7 + arch/x86/kvm/mmu/spte.h | 1 + arch/x86/kvm/mmu/tdp_mmu.h | 7 +- 7 files changed, 178 insertions(+), 351 deletions(-) -- 2.19.1.6.gb485710b
