Overview ======== Defer pinning of the guest's pages until nested page faults occur to improve startup time and reduce memory pressure for SEV guests. Cease paying the computational cost of pinning all pages when an encrypted region is registered, before it is known if they will be accessed. Cease creating the memory pressure due to pinning all pages when an encrypted region is registered before, it is known if they will be accessed. Timing Results ========== All timings are done by hand with and Android stopwatch app SEV guest size(GiB) | 4 | 8 | 16 | 32 | 60 | without patch series(sec) | 2 | 3 | 4 | 8 | 14 | with patch series (sec) | 1 | 1 | 1 | 1 | 1 | Applies To: =========== This patch applies top of this commit from the <next> branch of the kvm tree: c34b26b98cac Tianjia Zhang : KVM: MIPS: clean up redundant 'kvm_run' parameters eric van tassell (4): KVM:MMU: Introduce the set_spte_notify() callback KVM:SVM: Introduce set_spte_notify support KVM:SVM: Pin sev_launch_update_data() pages via sev_get_page() KVM:SVM: Remove struct enc_region and associated pinned page tracking. arch/x86/include/asm/kvm_host.h | 3 + arch/x86/kvm/mmu/mmu.c | 31 ++++- arch/x86/kvm/mmu/paging_tmpl.h | 27 ++-- arch/x86/kvm/svm/sev.c | 232 ++++++++++++++++---------------- arch/x86/kvm/svm/svm.c | 2 + arch/x86/kvm/svm/svm.h | 4 +- 6 files changed, 169 insertions(+), 130 deletions(-) -- 2.17.1
